What Was Found in Your Water — And Why It Changes Everything
You opened a letter from your water company, or you heard it from a neighbor, or you saw the notice posted somewhere near where you live on Big Mountain. It said two of the six wells that supply your drinking water tested positive for “forever chemicals.” One of them — Well #3 — registered PFOA at 10 parts per trillion. The federal limit is 4.
That single number — 10 — is more than double what the Environmental Protection Agency says is safe. And the company that sent you that notice has already said, in writing, that it does not plan to shut that well off because it cannot meet summertime demand without it.
We are going to tell you everything we know about what this means for your family, what your legal rights are in Montana, and what to do in the next 72 hours. None of what follows is guesswork. Every number, every rule, every deadline comes from the federal regulations that govern your water supply and the law of the state you live in. Our firm handles toxic tort and environmental contamination cases — and when a water company delivers contaminated water to families and then says it cannot afford to stop, the law has something to say about that.
Here is what happened: On April 27, 2026, Big Mountain Water Co. sampled all six of its wells. Lab results showed detectable levels of two federally monitored per- and polyfluoroalkyl substances — PFOA and PFOS — in two of those wells. Well #3 returned a PFOA reading of 10 ng/L (nanograms per liter, the same as parts per trillion). Well #2 showed 2.4 ng/L of PFOA and 3.3 ng/L of PFOS. Both compounds in Well #2 were below the federal maximum contaminant level. Well #3’s PFOA was not. It was 2.5 times the legal ceiling. The other four wells showed no detectable PFAS.
On June 17, the water company sent its customers a public notice. It told you this is “not an emergency.” It told you that you “have a right to know about your drinking water.” It told vulnerable people — infants, pregnant women, the elderly, and anyone with liver disease — to use a different source of water. It told you not to boil your water, because boiling concentrates PFAS. And the person delivering all of this was not the water company’s own executive — it was a spokesperson for Whitefish Mountain Resort, the ski and summer destination that dominates Big Mountain.
That fact alone — a resort spokesperson managing communications for a water utility — tells you something about the corporate relationship between these two entities. It tells you something about who might be responsible for what is in your water. And it tells you that the story behind these numbers is longer and more complicated than a single test on a single day.
The EPA’s Safety Limit and What Big Mountain Water Co.’s Own Tests Showed
The federal government spent years studying these compounds before drawing a line. In April 2024, the EPA finalized the first-ever enforceable drinking water limits for PFOA and PFOS under the Safe Drinking Water Act. The rule is precise and it is law:
“EPA is finalizing… individual MCLs for PFOA and PFOS at 4.0 nanograms per liter (ng/L) or parts per trillion (ppt)… and is finalizing health-based Maximum Contaminant Level Goals (MCLGs) for PFOA and PFOS at zero.”
That second number — the health-based goal of zero — is the one the defense hopes you never focus on. The EPA did not set the health goal at 4. The EPA set the health goal at zero. Four parts per trillion is the enforceable limit, the line below which the agency believes the risk is low enough to tolerate in a public water system. Zero is the level at which no known health risk exists. The EPA found no safe threshold. Let that sink in: the federal government’s own health goal for these compounds in your drinking water is none. Zero. Not a trace.
So when Well #3 registered 10 ng/L of PFOA, it was not “slightly over” a limit. It was two and a half times the enforceable ceiling — and infinitely above the health goal, which is zero. And the water company knew this when it sent you the notice.
What does 4 parts per trillion actually mean in human terms? Picture twenty Olympic-sized swimming pools. One single drop of PFOA in all of that water would put you near the legal limit. The EPA drew the line there because these compounds do not break down in the environment or in your body. They are called “forever chemicals” for exactly that reason — the carbon-fluorine bonds that make them useful in nonstick coatings, stain-resistant fabrics, and firefighting foam are among the strongest bonds in organic chemistry. Your body cannot metabolize them. Your kidneys cannot fully clear them. They accumulate. And they persist.
Montana’s Department of Environmental Quality holds primary enforcement authority for the Safe Drinking Water Act under federal delegation. It was DEQ that recommended Big Mountain Water Co. post the public notice — which means the state regulator looked at these numbers and concluded that customers needed to be told. That is not a courtesy. That is a regulatory action triggered by an MCL exceedance.
The water company has said it plans to resample the affected wells. New test kits arrived, and sampling was planned after rainy weather subsided. Here is what you need to understand about that: resampling does not erase the April 27 results. Those results are a documented MCL violation. And resampling — especially after heavy rain, which can dilute groundwater concentrations — can produce lower numbers that the defense will wave around as proof the problem is gone. Rain dilutes. It does not clean. The contamination source is still there. The PFAS does not degrade. What matters is what was in your water on the days you drank it, not what is in it on the day the company chooses to retest.
“Forever Chemicals”: What PFOA and PFOS Do to the Human Body
The science on PFAS health effects is not new, and it is not ambiguous. The C8 Science Panel — a group of independent epidemiologists appointed as part of a class-action settlement between DuPont and thousands of exposed residents in the Ohio River Valley — spent years studying the health effects of PFOA exposure. In 2012, the panel published its “probable link” findings. It found a probable link between PFOA and six conditions:
- Kidney cancer
- Testicular cancer
- High cholesterol
- Thyroid disease
- Pregnancy-induced hypertension
- Ulcerative colitis
Those findings are not a lawyer’s theory. They are the product of a court-supervised scientific investigation involving tens of thousands of exposed individuals. More recent scientific reviews have called some of the cancer evidence “supportive but not definitive” — which means the science is still developing, not that it has been debunked. And the cancer classifications from the world’s leading authority tell you where the scientific consensus sits.
The International Agency for Research on Cancer — the World Health Organization’s cancer agency — classified PFOA as Group 1: carcinogenic to humans. That is the highest category. It is the same category as asbestos, tobacco smoke, and benzene. PFOS was classified as Group 2B: possibly carcinogenic to humans. The Group 1 designation for PFOA rested on sufficient animal evidence and strong mechanistic evidence, with human evidence described as “limited” for testicular and renal-cell cancer. What that means for you: the world’s top cancer-science body has put PFOA in its most serious category. The defense can argue about whether PFOA caused any specific individual’s cancer — that is a different question — but they cannot honestly argue that PFOA is not a known human carcinogen.
Beyond cancer, PFAS exposure is linked to a range of health effects that can affect you and your children right now, not decades from now:
- Immune system effects — reduced antibody response to vaccines, particularly in children
- Thyroid disruption — changes to thyroid hormone levels that affect metabolism, energy, and development
- Liver effects — elevated liver enzymes, changes to liver function
- Developmental effects — lower birth weight, potential effects on growth and development
- Cholesterol changes — elevated total and LDL cholesterol, increasing cardiovascular risk
- Pregnancy complications — pregnancy-induced hypertension, preeclampsia
The June 17 public notice specifically warned infants, pregnant women, elderly people, and people with liver disease to use alternative water sources. That warning was not boilerplate. It was targeted at the populations the science identifies as most vulnerable. If you are in one of those groups — or if you were pregnant, nursing, or preparing infant formula using Big Mountain Water Co. water before June 17 — your exposure was not just hypothetical. It was real, it was ongoing, and no one told you until the day that notice arrived.
PFAS have long human half-lives — measured in years, not days. Unlike many environmental contaminants that pass through the body relatively quickly, PFOA and PFOS bind to serum proteins and persist in your blood. This is why baseline blood testing matters so much: a serum PFAS level taken now establishes what was in your body at the time of documented exposure. That number is both medical information you need for your own care and evidence you need for your legal rights.
Who Is Affected: The Big Mountain Water Co. Service Area
Big Mountain is the prominent peak northwest of Whitefish, Montana, in Flathead County. It is home to Whitefish Mountain Resort — a major year-round destination that draws skiers in winter and hikers, mountain bikers, and tourists in summer. The water system that serves this area is not a large municipal utility. It is a small water company serving a mix of full-time residents, seasonal homeowners, lodge guests, and commercial operations.
That heterogeneous population matters. Some people on this system have been drinking its water every day for years. Some are seasonal visitors who may have consumed it only during week-long ski trips or summer vacations. Some are lodge guests who had no idea they were drinking well water, let alone contaminated well water. And some are the most vulnerable — infants whose formula was mixed with this water, pregnant women who drank it through their pregnancies, elderly residents with compromised liver function.
The water company’s public notice said samples were collected as source water directly at each well — not from distribution pipes, reservoirs, or consumer taps. That distinction matters enormously, and the defense will use it. The argument will be: “These are well-head numbers. By the time the water reached your kitchen faucet, it was mixed with water from the four clean wells, so the concentration you actually consumed was lower.”
Here is why that argument is both partially true and deeply misleading. Yes, water from multiple wells mixes in the distribution system. But mixing does not eliminate PFAS. It dilutes it. If Well #3 was producing water at 10 ng/L PFOA and that water entered the distribution system, every customer who received blended water from that well consumed PFOA. The concentration at the tap may have been lower than 10 — but the EPA’s health goal is zero. Any detectable level above zero is a health exposure. And the water company itself stated it cannot meet summertime demand without operating both affected wells — which means contaminated well water was flowing into the distribution system during the highest-consumption period of the year, when the most people were on the mountain and the most water was being drawn.
The service-area maps that show which properties were served by Wells #2 and #3 during the contamination period are among the most important evidence in any claim. Those maps identify who was exposed, for how long, and at what concentration. They are maintained by the water company — and they can be overwritten by system updates. This is why preservation matters.
Your Legal Rights When Your Drinking Water Is Contaminated
When a water utility delivers water that exceeds a federal maximum contaminant level, the law does not say “try to do better next time.” The law creates liability — multiple forms of it, each reaching a different aspect of what happened.
Negligence. A water utility owes its customers a duty of reasonable care to deliver potable water — water that is safe to drink. The utility’s own testing documented PFOA above the EPA MCL. Under Montana law, a violation of a statute or regulation designed to protect the class of persons affected can establish negligence per se — meaning the violation itself is presumptive evidence of negligence, not just something a jury is allowed to consider. The EPA’s Safe Drinking Water Act MCL is a regulation designed to protect exactly the people Big Mountain Water Co. serves: drinking water customers. A documented exceedance is a documented breach.
Negligence per se. Well #3’s 10 ng/L PFOA reading is a documented MCL exceedance. That is not our characterization. That is the number. The EPA set the limit at 4. The well registered 10. In a state that recognizes negligence per se — and Montana law provides this avenue — the violation of the federal drinking water standard is presumptive negligence. The plaintiff does not have to prove the utility was careless. The utility has to prove it was not.
Private and public nuisance. PFAS contamination of a water supply constitutes an unreasonable interference with residents’ use and enjoyment of their property and with a public resource. Every customer on the system was affected. This supports both individual nuisance claims and public nuisance theories.
Trespass. PFAS compounds entered consumers’ plumbing, bodies, and property through the water delivery system. The intentional delivery of contaminated water to private connections can support a trespass theory — the physical intrusion of a harmful substance onto your property and into your body — distinct from the negligence claim.
Breach of implied warranty of merchantability. Water delivered to consumers is a product. PFAS-contaminated water exceeding federal MCLs is unfit for its ordinary purpose — consumption and domestic use. The implied warranty that goods supplied to consumers are fit for their ordinary purpose is breached when the water is not safe to drink.
Medical monitoring. PFAS exposure is linked to cancer, thyroid disease, immune dysfunction, and developmental harm. Affected customers need baseline blood serum testing and longitudinal health surveillance. Montana courts have recognized medical monitoring as a cognizable damage category in toxic exposure cases. Whether it stands as an independent cause of action or as a damages element is a question of current Montana law that we confirm at the time of filing — but the right to recover the cost of monitoring is real.
Products liability against PFAS manufacturers. This is a separate track from the claims against the water company. The companies that designed, manufactured, marketed, and distributed PFOA and PFOS compounds knew of their persistence and health risks for decades. National litigation has established design defect, failure to warn, and conspiracy to conceal theories against these manufacturers. Joining manufacturer defendants provides deep-pocket recovery independent of the local water company’s assets. The AFFF multidistrict litigation — MDL-2873, pending in the District of South Carolina before Judge Richard Gergel — had over 15,000 actions pending as of June 2026. If the Big Mountain contamination traces to firefighting foam used at the resort, the AFFF MDL track becomes directly relevant.
Montana’s constitutional environmental right. This is the weapon most states do not have.
Montana’s Constitutional Right to a Clean and Healthful Environment
Montana is one of the few states whose constitution contains an enforceable environmental right. Article IX, Section 1 of the Montana Constitution provides:
“The state and each person shall maintain and improve a clean and healthful environment in Montana for present and future generations.”
The Montana Supreme Court has interpreted this provision as both a substantive right and an enforceable cause of action. It is not aspirational language. It is law — law that creates an independent basis for holding parties accountable for environmental contamination that affects public health. Montana’s courts have historically been receptive to environmental plaintiff claims, and the state’s strong constitutional environmental protections create a favorable backdrop for PFAS litigation that does not exist in most other jurisdictions.
What this means in practice: a PFAS contamination claim in Montana carries a legal tool that a comparable claim in, say, Texas or Florida does not. The constitutional claim is an independent cause of action — separate from negligence, separate from nuisance, separate from products liability. It provides a distinct path to recovery and a distinctive settlement lever. When the water company and its insurer evaluate exposure, they must account for a constitutional claim that a Montana jury — drawn from Flathead County residents who tend to hold strong environmental values — may take seriously in a way that jurors in other states might not.
This is not a minor advantage. It is a structural one. And it is one of the reasons why PFAS contamination in Montana is, from a litigation perspective, potentially more valuable than the same contamination in a state without an analogous constitutional provision.
Who Is Responsible: The Defendant Map
A contamination case without an identified source is a monitoring case, not a recovery case. The litigation spine runs through source identification — tracing the PFAS in Wells #2 and #3 to a specific origin through hydrogeological modeling, contaminant fingerprinting, and historical land-use investigation. But the defendant map is broader than just the source.
Big Mountain Water Co. — the water utility operator of record. This entity owed you a duty to deliver water meeting federal Safe Drinking Water Act standards. It operated Well #3 at 2.5 times the PFOA MCL. Its public notice conceded it cannot meet demand if the affected wells are shut off — which means it made a knowing trade-off between contamination risk and operational continuity. That statement is a litigation fact, not just a public-relations line. It goes to knowledge, to priority, and to punitive damages exposure.
Whitefish Mountain Resort — the affiliated entity and potential PFAS source. The resort’s spokesperson is handling all public communications for the water company. That is not how independent companies behave. The corporate relationship between the water company and the resort must be established through discovery — ownership structure, shared personnel, shared facilities, and any common insurance coverage. Beyond the corporate link, resort operations may also be a PFAS source. Ski resorts commonly store and use aqueous film-forming foam (AFFF) — the leading PFAS source in many communities — for fuel-handling areas, lift-machinery fire suppression, and emergency response. If AFFF was used, stored, or trained with at the resort, it may have leached into the fractured-bedrock aquifer that feeds the wells. The hydrogeology of the Northern Rockies — fractured-bedrock aquifers with complex contaminant migration pathways — makes source identification challenging but not impossible. It requires sophisticated groundwater modeling by a qualified hydrogeologist.
Unknown upstream PFAS source contributors. PFAS in groundwater originates from man-made sources. Beyond AFFF, potential contributors include any entity that used or stored PFAS-containing materials in the Big Mountain recharge area — industrial coatings, stain-resistant treatments, chemical manufacturing, or even ski-wax products. Source identification through hydrogeological investigation and contaminant fingerprinting is the primary litigation target.
PFAS manufacturers — the national product-liability defendants. Companies like 3M, DuPont, Chemours, and Corteva designed, manufactured, marketed, and distributed PFOA and PFOS compounds for decades. The established products-liability track in national PFAS litigation includes design defect, failure to warn, and civil conspiracy theories. These manufacturers have already entered multi-billion-dollar settlements with public water systems — 3M agreed to pay approximately $10.3 billion in present value over 13 years, and DuPont, Chemours, and Corteva agreed to approximately $1.185 billion. Those settlements resolve municipal contamination claims and contain no admission of liability. They are separate from the personal-injury cases. But they demonstrate two things: the manufacturers have deep pockets, and the established liability tracks work. Joining manufacturer defendants provides recovery independent of the local water company’s assets.
The engineering firm that designed the water system. The water company has contacted the engineering firm that designed its water system to research remediation solutions. That firm’s prior design work — well placement, intake design, treatment specifications — is a discovery target. If the system design failed to account for known area contamination risks or did not incorporate available filtration technology, design negligence may attach.
The Evidence Clock: What Records Exist and How Fast They Can Disappear
Environmental contamination cases are won or lost on documents. The records that prove when the contamination started, who knew about it, and what they did or did not do about it already exist — but they are on clocks. Some of those clocks are short. Every one of them is faster than you think.
Historical water quality testing records from all six wells. The April 27 sampling was not necessarily the first time these wells were tested for anything. Historical testing records — for PFAS or for other contaminants that might have flagged a problem — establish when PFAS was first detectable and whether the utility should have tested earlier. The EPA’s PFAS rulemaking process spanned years before the 2024 final rule. A water company operating in that regulatory environment had reason to know PFAS testing was coming. Regulatory retention requirements may preserve these records, but internal communications about testing decisions may be subject to email auto-deletion policies. Preservation letters must go out within 30 to 60 days.
AFFF firefighting foam purchase, storage, usage, and training records from Whitefish Mountain Resort and any local fire districts. AFFF is a leading PFAS source. Ski resorts store and use firefighting foam for fuel-handling areas, lift-machinery fire suppression, and emergency response. Usage records can establish the contamination source and link the resort as a PFAS contributor to groundwater. Operational records may be discarded under routine document-retention schedules. Fire-department training foam records may already be years old. Preservation letters within 30 days.
Well construction permits, geological surveys, hydrogeological studies, and aquifer characterization data. These identify recharge zones, contaminant migration pathways, and the relationship between potential upgradient sources — resort operations, fuel storage, maintenance facilities — and the affected wells. This is foundational for source attribution. Engineering and permitting records are typically retained, but supplementary studies and consultant reports may be scattered across multiple files. Secure within 60 days.
Internal communications between Big Mountain Water Co., Whitefish Mountain Resort, and Montana DEQ. These reveal the knowledge timeline, the decision-making process around continued well operation, and any communications prioritizing operational continuity over immediate contamination response. This is central to negligence and punitive damages theories. Email retention policies may auto-purge after 30 to 90 days. Litigation holds must be issued immediately to prevent routine destruction.
Customer notification records, billing records, and service-area maps. These identify the exposed class, exposure duration for each consumer, and the geographic scope of distribution from affected wells. Service maps are maintained, but historical routing data showing which wells served which zones over time may be overwritten by system updates. Secure within 60 days.
The engineering firm’s original water system design reports, well placement studies, and subsequent modifications. These evaluate whether the system design accounted for area contamination risks and whether treatment was specified that could have addressed PFAS. Design firm records are typically archived but may be subject to professional liability retention limits. Preservation letter within 30 days.
When a defendant lets required evidence die after notice, the law answers. An adverse-inference instruction — where the jury may assume the lost record was as bad as the plaintiff says — is available in many jurisdictions. Sanctions are available. The leverage begins the moment the preservation letter is on file. But a preservation letter sent six months from now cannot freeze records that were destroyed three months ago. This is why the letter goes out the day you call — not the day you decide whether to file suit.
The Playbook: What the Water Company and Its Insurer Will Try
The other side has a playbook. It is not improvised. It is the same set of moves that water utilities and their insurers deploy in every contamination case, calibrated to minimize payout and maximize delay. Here are the plays and the counter to each.
Play 1: “This is not an emergency.” The public notice used those exact words. The purpose is to frame the contamination as routine — a regulatory technicality, not a health threat. The counter: the EPA set the health goal at zero. The enforceable limit is 4. The well registered 10. The notice itself warned vulnerable populations to find alternative water. If it is not an emergency, why did it tell pregnant women and infants to stop drinking the water? The gap between the language and the warning is the case.
Play 2: “Our situation is relatively isolated.” The resort’s spokesperson said this publicly. The purpose is to minimize — to compare your contamination to worse cases elsewhere and imply yours is not serious enough to act on. The counter: every customer’s cumulative PFAS exposure matters. “Relatively isolated” does not mean harmless. A community of families drinking water at 2.5 times the federal limit is not “isolated” to the families in it. And the comparison to worse contamination is not a defense — it is an admission that the company knows what PFAS does at higher levels and chose to keep delivering it at a lower level.
Play 3: “These are source-water samples, not tap-water samples.” The spokesperson emphasized that samples were collected directly at the wells, not from distribution pipes or consumer taps. The purpose is to argue that the concentrations customers actually consumed were lower than the well-head readings after mixing. The counter: the water company cannot produce tap-level readings it never took. The absence of distribution-system sampling is not a defense — it is a failure. The utility operated wells it knew were contaminated and did not monitor what reached customers’ faucets. And the utility itself stated it cannot meet demand without the affected wells, which means contaminated water was entering the distribution system. Dilution is not elimination. The health goal is zero.
Play 4: “We need to resample before we act.” The company ordered new test kits and planned resampling after rainy weather. The purpose is to stall — to push the timeline past the point where evidence can be preserved, where customers can establish baseline medical testing, and where a legal claim can be built on the original results. The counter: the April 27 results are a documented fact. Resampling after heavy rain — which dilutes groundwater concentrations — can produce lower numbers that the defense will use to argue the problem has resolved. Rain dilutes. It does not clean. The source is still there. The PFAS does not degrade. What was in your water on the days you drank it is what matters.
Play 5: “We’re working with DEQ on a remediation plan.” The purpose is to frame the company as cooperative and proactive — and to use regulatory cooperation as a shield against civil liability. The counter: working with the regulator does not immunize you from the people you harmed. DEQ’s recommended public notice is an acknowledgment of an MCL exceedance, not a clean bill of health. A remediation plan is what the company should do. Compensation for the people who drank the water is what the company must do. Those are different things.
Play 6: The quick-release check. In the weeks and months after a contamination notice, some affected customers may receive communication from the water company or its insurer offering a modest payment — perhaps a credit on a water bill, perhaps a small settlement — in exchange for signing a release. A release is a legal document that surrenders your right to sue. If you sign it, you cannot later bring a claim even if you develop cancer years from now. Do not sign anything from the water company or its insurer without speaking to a lawyer first. Not a waiver, not a release, not a settlement, not a “customer goodwill” document. Nothing.
Medical Monitoring: Your Single Most Important Immediate Action
If you or anyone in your household consumed water from the Big Mountain Water Co. system — especially if you are pregnant, nursing, have an infant, are elderly, or have liver disease — the single most protective thing you can do right now is establish a health baseline.
Serum PFAS blood testing. A blood test can measure the levels of PFOA, PFOS, and other PFAS compounds in your serum. This is called biomonitoring. It tells you what is in your body right now. Because PFAS persist for years, a test taken today reflects your cumulative exposure from the water you have been drinking. This number is both medical information — you and your doctor need to know it — and evidence. A serum PFAS level establishes a documented connection between your body and the contaminated water. That connection is what a legal claim is built on.
Baseline health screening. Depending on your exposure duration and individual risk factors, baseline screening may include:
– Kidney function testing — because kidney cancer is one of the C8 Science Panel’s probable-link conditions for PFOA exposure
– Thyroid panel — because thyroid disease is a documented PFAS-linked condition
– Liver enzyme testing — because liver effects are documented and the public notice itself flagged liver-compromised individuals as at-risk
– Cholesterol screening — because elevated cholesterol is a probable-link condition
– Blood pressure monitoring — because pregnancy-induced hypertension is a probable-link condition, relevant for pregnant women or women who were pregnant while consuming the water
– For men — discussion with your physician about testicular health, as testicular cancer is a probable-link condition
Longitudinal surveillance. A single baseline is a snapshot. PFAS-linked diseases are typically latent — they may not manifest for years or decades. What matters is establishing the baseline now so that changes over time can be tracked. This is what medical monitoring means as a legal concept: the cost of periodic testing, surveillance, and follow-up across the years between exposure and any potential disease manifestation. In a legal claim, medical monitoring is a recoverable damage — the defendant pays for the testing you need because the defendant put you in a position where you need it.
For parents of infants and young children. If you prepared infant formula with Big Mountain Water Co. water, or if your young children drank it regularly, tell your pediatrician. PFAS exposure in early life is of particular concern because of potential effects on development, immune response, and growth. Your child’s pediatrician can advise on appropriate monitoring.
Document your water consumption history. Write down when you lived on the system, which property you lived at, how long you consumed the water, whether you used filtration (and what kind — most standard filters do not remove PFAS), and any health concerns that have emerged. This personal exposure log is evidence. Keep it.
What a PFAS Water Contamination Case Is Worth
We are not going to tell you a number and call it a promise. What we will do is tell you honestly what drives value in a case like this, and what the range looks like based on the variables that are currently unknown.
The case value range for this matter, based on what is documented and what is not yet known, runs from approximately $750,000 on the low end to $25,000,000 on the high end. That is an intentionally broad range because three variables — none of which is yet resolved — determine where any individual claim or group of claims falls within it.
Variable one: the size and exposure duration of the affected customer base. A small water system serving the Big Mountain/Whitefish resort area with a limited population and sub-MCL readings in most wells, with no currently reported injuries, sits at the lower end. A class action or mass joinder with hundreds of exposed consumers, full medical monitoring plus individual personal injury claims for diagnosed PFAS-linked conditions, property damage claims, and punitive damages sits at the upper end.
Variable two: whether the source is traceable to a deep-pocket defendant. If the contamination traces to resort operations that used AFFF firefighting foam, or if national PFAS manufacturers are joined as defendants under products-liability theories, the recovery ceiling rises substantially. A contamination case with no identified source is a monitoring case — valuable but limited. A contamination case with a traced source and joined manufacturer defendants is a recovery case.
Variable three: whether individual latent injuries develop within the limitations window. PFAS-linked diseases are latent. If diagnosed conditions emerge within the legal limitations period — measured from discovery, not exposure — individual personal injury claims carry significant value, particularly for cancer cases.
Upward modifiers specific to this case. Two factors push the value of this case upward compared to a generic PFAS contamination matter. First, Montana’s constitutional environmental right — Article IX, Section 1 — provides an independent cause of action that most states do not offer. This is a distinctive settlement lever. Second, Montana’s courts have historically been receptive to environmental plaintiff claims, and Flathead County’s jury pool — drawn from long-time Montana residents, agricultural communities, and an increasingly urbanized Whitefish-area population with strong environmental values — may be particularly receptive to clean-water claims. The combination of a constitutional right and a sympathetic jury pool increases the litigation risk for defendants, which increases the value of claims.
What punitive damages could add. If discovery reveals that the water company or the resort knew or should have known of PFAS contamination earlier and continued operating affected wells — or if PFAS manufacturers concealed health risks — the reckless-disregard standard for punitive damages may be satisfied. The water company’s own public statement that it cannot meet demand without the contaminated wells is, at minimum, evidence of a knowing operational choice. Whether that rises to the standard for punitive damages is a question for discovery and ultimately a jury. Montana’s punitive damages framework and any applicable caps are matters we confirm at the time of filing.
Past results depend on the facts of each case and do not guarantee future outcomes.
The First 72 Hours: What to Do Right Now
Day one.
Stop drinking the water if you have not already. This is not paranoia — it is the recommendation the water company itself made to vulnerable populations, and the EPA’s health goal for these compounds is zero. Use bottled water or water from a known-safe alternative source for drinking, cooking, and preparing infant formula. Do not boil the water — boiling concentrates PFAS because the water evaporates and the compounds remain behind. If you have a home water filter, check whether it is certified for PFAS reduction — most standard carbon filters are not certified for this purpose. Reverse osmosis systems and specific PFAS-certified filters are effective.
Do not sign anything from the water company or its insurer. Not a release, not a waiver, not a settlement offer, not a “customer goodwill” credit that comes with paperwork. If someone hands you a document, read it, keep it, and bring it to a lawyer. Do not sign it.
Day two.
Document your exposure. Write down: when you moved to the Big Mountain Water Co. service area, which property you live at, how long you have been consuming the water, whether you used any filtration, and the names and ages of everyone in your household who drank the water. Note any health concerns — new diagnoses, unexplained symptoms, changes in blood work, thyroid issues, cholesterol changes. If you were pregnant or nursing while consuming this water, document that with dates.
Contact your physician. Tell them you have been exposed to PFAS-contaminated drinking water at levels above the EPA MCL. Ask about serum PFAS blood testing and baseline health screening appropriate to your individual risk profile — kidney function, thyroid panel, liver enzymes, cholesterol. If you have an infant or were pregnant while consuming the water, tell your pediatrician or obstetrician specifically.
Day three.
Call a lawyer. Not because you are “suing” anyone yet — but because the evidence that proves your case is dying on a clock, and the only thing that stops that clock is a formal preservation demand. Internal emails between the water company, the resort, and DEQ may be auto-deleted within 30 to 90 days. AFFF usage records at the resort may be on routine retention schedules that allow destruction. Service-area maps showing which wells served which zones may be overwritten by system updates. The day you call is the day those records can be frozen. Every day you wait is a day the defense is counting on.
If you are reading this at 2 a.m. from a kitchen table in Whitefish, that call can wait until morning — but it should not wait past this week.
How a PFAS Contamination Claim Works in Montana
The process is not fast, but it is structured. Here is what to expect.
Intake and exposure documentation. We gather your water consumption history, residence dates on the system, household members, health history, and any diagnoses or symptoms. This is the foundation of your individual claim.
Preservation and investigation. Litigation-hold letters go out immediately to Big Mountain Water Co., Whitefish Mountain Resort, the engineering firm, and any other potential defendant or evidence custodian. These letters order the recipients to preserve all relevant records — emails, testing data, AFFF usage logs, well construction records, service maps, internal communications. We file public-records requests with Montana DEQ for all correspondence and inspection records related to the Big Mountain system. We pull historical water quality data. If the contamination may trace to AFFF, we investigate the resort’s fire-suppression practices and any local fire district training that may have used foam on or near the Big Mountain recharge area.
Source identification. This is the spine of the case. We deploy a hydrogeologist to model groundwater flow in the fractured-bedrock aquifer beneath Big Mountain, map recharge zones and contaminant migration pathways, and identify the relationship between potential upgradient sources and the affected wells. Contaminant fingerprinting — analyzing the specific PFAS compound profile in the well water — can distinguish between different source types. AFFF has a characteristic PFAS signature. Industrial sources have a different one. The fingerprint narrows the source.
Medical monitoring establishment. We work with a toxicologist to establish the dose-response relationship between the documented exposure levels and health risk, and with a life-care planner to build the cost of longitudinal medical surveillance. This is the medical monitoring damages stream.
Class or mass joinder evaluation. Depending on the size of the affected customer base and the uniformity of claims, we evaluate whether a class action or mass joinder structure is appropriate. The class is defined by the service-area maps — every customer who received water from the affected wells during the contamination period is a potential class member.
Manufacturer joinder. If the source traces to PFAS-containing products — AFFF, coatings, or other materials — we join the manufacturer defendants. The national PFAS litigation landscape provides both a template for manufacturer joinder and leverage in mediation. 3M, DuPont, Chemours, Corteva, and other manufacturers face thousands of claims and have already entered multi-billion-dollar settlements with public water systems. Individual injury claims are a separate track, but the established products-liability framework and the manufacturers’ deep pockets make this a critical component of the recovery architecture.
Discovery and depositions. Records come out. Internal communications between the water company, the resort, and DEQ reveal the knowledge timeline. Testing records show whether earlier monitoring should have been performed. AFFF records — if they exist — show whether the resort was a source. Engineering design records show whether the system was built to handle known contamination risks. Depositions put people under oath to explain the choices that were made — including the choice to keep operating contaminated wells because of “summertime demand.”
Mediation or trial. PFAS cases in Montana carry the constitutional environmental claim as a distinctive settlement lever. The combination of documented MCL exceedance, source identification, medical monitoring costs, manufacturer deep pockets, and Montana’s constitutional right creates a settlement posture that most defense teams recognize as serious. If mediation does not produce a fair resolution, the case is tried in Flathead County District Court before a jury of the reader’s neighbors — people who drink water, who understand Montana’s environmental values, and who may not look kindly on a company that delivered contaminated water and then said it could not afford to stop.
Frequently Asked Questions
Is my water safe to drink now?
If you are on the Big Mountain Water Co. system and the June 17 notice told you to use an alternative water source, use an alternative water source. The notice specifically warned infants, pregnant women, elderly people, and people with liver disease. But the EPA’s health goal for PFOA and PFOS is zero — not 4, zero. Any detectable level above zero is a health exposure. The enforceable limit of 4 ng/L is a regulatory ceiling, not a health-based safety guarantee. The decision of what level is acceptable for your family is yours to make with the best information. That information is: the EPA found no safe threshold, one well was at 2.5 times the enforceable limit, and the water company says it is still operating that well.
What does “10 ng/L” mean in plain language?
Ten nanograms per liter is the same as ten parts per trillion. Picture twenty Olympic-sized swimming pools filled with water. A single drop of PFOA dissolved across all of that water would put you near the EPA’s enforceable limit of 4 ppt. The well registered 10 — two and a half times that. The health goal is zero.
I have been drinking this water for years. Am I going to get cancer?
No one can answer that question with certainty for any individual. What the science says is that PFOA is classified as a Group 1 human carcinogen by the World Health Organization’s cancer agency, and that the C8 Science Panel found a “probable link” between PFOA and kidney cancer and testicular cancer. “Probable link” means the scientific evidence supports an association — it does not mean every exposed person will develop cancer. Your individual risk depends on your cumulative exposure, your genetics, your health history, and other factors. What you can do is establish a health baseline now through blood testing and screening, so that any change is caught as early as possible. Early detection is the single most protective action available.
Should I get my blood tested for PFAS?
Yes — if you consumed water from the Big Mountain Water Co. system, a serum PFAS blood test is the single most important medical step you can take. It measures what is in your body right now. Because PFAS persist for years, the test reflects your cumulative exposure. This is both medical information you and your doctor need and evidence that establishes a documented connection between your body and the contaminated water. Tell your physician you have been exposed to PFAS-contaminated drinking water above the EPA MCL and ask for serum PFAS testing.
Can I sue the water company?
You have legal rights against the water company — including claims for negligence, negligence per se based on the documented MCL exceedance, nuisance, trespass, breach of implied warranty, medical monitoring, and Montana’s constitutional right to a clean and healthful environment. Whether filing an individual lawsuit or joining a class action is the right strategy depends on the facts of your situation, the size of the affected population, and the claims that apply to you. The consultation is free. The answer is specific to your family.
How long do I have to file a claim?
Montana measures the deadline to file a personal injury claim from the date you discovered — or reasonably should have discovered — your injury and its cause, not from the date you were first exposed. For a family that received the June 17, 2026 public notice informing them that their drinking water exceeded federal PFAS safety limits, the clock may have just started. Montana’s personal injury limitations period is measured in years, not months. But the evidence that proves your case dies much faster than your legal rights do. The records that establish what was in your water, who knew about it, and when they knew it can be legally destroyed on retention schedules that run in months, not years. The statute of limitations is not the deadline you should worry about first. The evidence clock is.
Should I boil my water to make it safe?
No. Boiling water does not remove PFAS. Boiling concentrates PFAS — the water evaporates and the chemical compounds remain behind, leaving you with higher concentrations than you started with. The water company’s own public notice said this. The only effective home treatment for PFAS is a certified filtration system — specifically, reverse osmosis or a filter certified under NSF/ANSI standards for PFOA and PFOS reduction. Standard pitcher filters and refrigerator filters are generally not certified for PFAS.
What if I am pregnant or have an infant?
The June 17 notice specifically identified pregnant women and infants as at-risk populations and advised using alternative water sources for drinking and preparing food — including infant formula. The science supports this warning: PFAS can cross the placenta and are present in breast milk. Exposure during pregnancy and early life is of particular concern because of potential effects on development, immune function, and growth. If you are pregnant or nursing, contact your obstetrician or pediatrician immediately. Use bottled or known-safe water for all consumption and formula preparation. Ask your physician about serum PFAS testing for yourself and, if appropriate, your child.
Will my property value be affected?
Properties served by a water system with documented PFAS contamination above federal MCLs face potential property value diminution. The contamination affects the water supply — a fundamental attribute of the property — and the public record of the contamination is permanent. Property damage claims are a recognized component of PFAS contamination litigation. The extent of diminution depends on remediation outcomes, the duration of the contamination, and market conditions in the Whitefish/Big Mountain area.
Is the ski resort connected to this?
The public communications for Big Mountain Water Co. are being handled by a Whitefish Mountain Resort spokesperson. That fact alone suggests a corporate or operational relationship between the two entities that discovery must explore. Beyond the corporate link, resort operations may be a source of the PFAS contamination. Ski resorts commonly store and use aqueous film-forming foam (AFFF) — the leading PFAS source in many communities — for fuel-handling areas, lift-machinery fire suppression, and emergency response. If AFFF was used, stored, or trained with at the resort, it may have leached into the fractured-bedrock aquifer feeding the affected wells. Source identification through hydrogeological investigation is the primary litigation target.
Why Attorney911
Ralph Manginello has spent 27+ years in courtrooms, including federal court. He was a journalist before he was a lawyer — he understands that the story behind a contamination event is told in documents, and that those documents have to be found before they are destroyed. Ralph leads our trial team with the conviction that a company which delivers contaminated water to families and then says it cannot afford to stop has earned a fight. Read more about Ralph Manginello.
Lupe Peña spent years inside a national insurance-defense firm — the rooms where adjusters and their software decided how to deny, delay, and devalue claims exactly like yours. He knows how the water company’s insurer will value this claim, what the reserves will be set at, and what tactics the defense will deploy. Now he sits on your side of the table. Lupe is fluent in Spanish and conducts full client consultations in Spanish without an interpreter. Read more about Lupe Peña.
We handle toxic tort and environmental contamination cases because the people who drink contaminated water rarely have the resources to fight the company that delivered it. Our fee is contingency — 33.33% before trial, 40% if the case goes to trial. We do not get paid unless we win your case. The consultation is free. The call is confidential. And if we are not the right fit for your situation, we will tell you that plainly.
If someone you love has been diagnosed with a PFAS-linked condition — kidney cancer, testicular cancer, thyroid disease — and you consumed Big Mountain Water Co. water, the time to connect that disease to its cause may be now. Learn about our wrongful death and catastrophic injury work.
If Your Family Drank This Water
The notice said this is “not an emergency.” The EPA said the health goal is zero. The well registered 10. The company said it cannot meet demand without the well that produced that 10. Your family drank the water.
You have rights that are independent of whatever remediation the water company eventually undertakes. The company fixing the water does not undo the exposure you already received. It does not pay for the medical monitoring you now need. It does not compensate you for the fear of disease that every parent on that system is carrying right now. And it does not answer the question of who put the PFAS in your water in the first place — or whether they knew it was there before you did.
Call 1-888-ATTY-911. Free consultation. No fee unless we win your case. Hablamos Español. We are available 24/7 — live staff, not an answering service. Contact us.
The water company sent you a notice. Send us your story. The evidence is on a clock, and the day you call is the day that clock starts working for you instead of against you.
Past results depend on the facts of each case and do not guarantee future outcomes. This page is legal information, not legal advice. Contacting the firm is free and confidential.