The Environmental Protection Agency (EPA) has released updated nationwide testing results for PFAS—commonly known as forever chemicals—and the numbers are troubling. According to the newest data, around 49.5 million people in the United States are drinking water that contains PFAS levels above what the EPA now considers safe. That is one out of every seven Americans.
This latest update, released in November, added more than a hundred new water systems that have recently exceeded federal safety limits.
What Exactly Are PFAS?
PFAS (per- and polyfluoroalkyl substances) are a large family of man-made chemicals used for decades in nonstick cookware, waterproof fabrics, food packaging, firefighting foam, and countless industrial products.
They are known as “forever chemicals” for a reason:
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They don’t break down naturally,
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They accumulate in soil, water, and the human body, and
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Studies link them to cancers, immune system problems, liver effects, developmental damage in children, and hormonal disruption.
Because of their persistence and health risks, PFAS in drinking water has become a major national concern.
Which Areas Have Newly Failed EPA Standards?
Since the EPA’s previous update in August, additional systems in Anaheim, San Jose, and Brownsville have reported yearly averages above the legal limits.
Locations Recently Added to the List of Non-Compliant Systems
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Anaheim, California
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San Jose, California
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Brownsville, Texas
These areas join 944 other water utilities across the country that have already reported PFAS levels above federal standards.
What Does the New Testing Show?
Anaheim, CA
Water samples collected between November 2024 and May 2025 reveal:
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PFOS: 17 ppt (limit is 4 ppt — over four times higher)
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PFOA: 8 ppt (limit is 4 ppt — double the limit)
Despite the new listing, Anaheim has been aware of PFAS contamination since 2019 and even notified residents years earlier.
San Jose, CA
A well operated by California Water Service Company averaged double the legal limit of PFOS between January and July 2025.
Brownsville, TX
Testing from two treatment plants between July 2024 and April 2025 showed PFOS slightly exceeding the limit. Officials say they are still assessing the data and planning next steps.
Why Are These Limits Changing So Much?
Originally, the EPA set enforceable limits for six PFAS chemicals under the Biden administration.
However, in May 2025, the agency announced it would rescind four of those limits, keeping only the two strictest (PFOS and PFOA) because:
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They have the strongest scientific evidence of harm
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They are most commonly found in drinking water
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They are tied to the highest health risks
The remaining limits are extremely stringent — 4 parts per trillion (ppt) for each chemical.
To put this in perspective:
4 ppt is like 4 droplets of water in an Olympic-size swimming pool.
What Happens to Cities That Exceed the Limits
Water systems that continue to test above these limits are required to:
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Develop new water sources,
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Install treatment systems such as ion-exchange filters or activated carbon,
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Or blend contaminated water with cleaner sources.
The original compliance deadline was 2029, but the EPA recently announced extensions because the cost and construction timelines are significant.
Major Costs for Local Governments
For example:
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Anaheim is spending $200 million to equip multiple wells with advanced filtration systems.
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Brownsville expects major expenses as well and may seek state or federal grants.
Residents might face increased water bills, although Brownsville officials say it is too early to know if rates will rise.
Why Is There a Lawsuit Against the EPA?
Many water utilities argue:
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They didn’t cause the pollution,
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PFAS manufacturers should be held responsible,
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And the federal standards were implemented too quickly and incorrectly.
In 2024, large water industry groups filed a lawsuit claiming the EPA did not follow proper scientific or administrative procedures.
Then politics complicated the situation:
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The lawsuit was paused during the early months of the Trump administration in 2025.
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In September 2025, the EPA itself told the court that parts of its earlier rule were flawed and should be overturned.
Environmental Groups Push Back
Environmental organizations disagree strongly and filed their own legal response, arguing that:
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Removing the four PFAS limits would put millions at risk,
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Communities have already invested millions to meet those limits,
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And letting the EPA reverse course would undermine drinking-water protections.
The case resumed after the six-week government shutdown, and all parties are expected to file new arguments soon.
Why This Matters
The number of people drinking contaminated water is expected to grow as the EPA completes its nationwide PFAS testing program, which requires nearly all public water systems to check their supplies by the end of the year.
The results so far paint a clear picture:
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PFAS contamination is widespread,
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Clean-up will require billions of dollars,
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And the science confirms that long-term exposure poses serious health risks.
The debate continues over who should be responsible — local utilities or the companies that manufactured these chemicals for decades.
