Published April 2026 — Updated Regularly

PFAS Contamination in Drinking Water 2026: Latest Affected Areas and What You Can Do

Last updated: May 2026

PFAS contamination in drinking water is one of the most serious public health crises in the United States right now. These "forever chemicals" have been found in the drinking water of communities across all 50 states. In 2026, new federal limits and expanded testing have revealed that the problem is even larger than anyone wanted to admit.

This page covers which areas are most affected, what the new EPA standards actually mean, how to find out if your water is contaminated, and what legal options may be available if you've been exposed.

What Is PFAS and Why Is It in Drinking Water?

PFAS is a group of over 12,000 synthetic chemicals that have been used in manufacturing and consumer products since the 1940s. They were valued by industry because they are extraordinarily resistant to heat, water, and grease — but that same chemical stability is what makes them dangerous to human health. They do not break down in the environment or in the human body, which is why they are called "forever chemicals."

PFAS get into drinking water through several main pathways:

• Industrial discharge: Factories making PFAS-containing products (Teflon, Gore-Tex, food packaging) released chemicals into local water supplies
• Firefighting foam (AFFF): Aqueous film-forming foam used at military bases and airports contains massive concentrations of PFAS that leach into groundwater
• Landfill leachate: PFAS-containing products in landfills leach chemicals into groundwater over time
• Agricultural application: Some biosolids (treated sewage) spread on farmland contain PFAS that enter soil and water
• Stormwater runoff: Rainwater carries PFAS from contaminated surfaces into rivers, lakes, and groundwater

The 2024 EPA PFAS Limits: A Turning Point

In April 2024, the EPA finalized the first-ever federal drinking water limits for PFAS compounds. These legally enforceable Maximum Contaminant Levels (MCLs) require public water systems across the country to test for PFAS and reduce levels to comply with the new standards.

These limits are extraordinarily stringent — parts per trillion is roughly one drop in 500 Olympic swimming pools. This reflects the EPA's assessment of how toxic PFAS actually are. When the previous advisory level of 70 ppt was set back in 2016, many researchers argued it was already too high. The new limits are nearly 18 times more restrictive.

Think about that for a second. The old "safe" level was already considered unsafe by scientists.

Water utilities now have until 2029 to comply with these standards — which means testing data flowing in right now is revealing how many communities are out of compliance.

Which Areas Are Most Affected in 2026?

PFAS contamination has been found in communities in all 50 states. The most heavily contaminated areas tend to be near:

Military Bases

Military installations that used AFFF (aqueous film-forming foam) for firefighting training and emergencies are among the most heavily contaminated sites in the country. The Department of Defense has identified over 700 military bases with known or suspected PFAS contamination.

Some of the most severely affected communities include areas near:

• Camp Lejeune, NC — also subject to separate water contamination litigation
• Pease Air Force Base, NH
• Willow Grove Naval Air Station, PA
• Vandenberg Space Force Base, CA
• Patrick Space Force Base, FL
• Military installations in Michigan, Colorado, Alabama, and dozens of other states

Industrial Manufacturing Areas

Regions with historical chemical manufacturing have high PFAS levels in water, soil, and air. Key areas include:

• The Cape Fear River basin in North Carolina (Chemours/DuPont's GenX contamination)
• West Virginia near DuPont's Washington Works plant (subject of a major legal case depicted in the film Dark Waters)
• Southeastern Michigan near 3M's manufacturing operations
• Decatur, Alabama — one of the most contaminated cities in the country
• Various New Jersey communities near chemical plants

Agricultural Areas

States that allowed heavy biosolid (sewage sludge) application to farmland have found widespread PFAS contamination in private wells. Maine in particular declared a state of emergency over PFAS-contaminated farms, and multiple states have found contamination affecting both wells and food crops.

Major Cities With Known Issues

Expanded testing under the EPA's new rules has revealed PFAS in water systems serving major urban areas. Data released in 2025 showed detectable PFAS levels in water serving portions of:

• New York City (certain source water locations)
• Miami, FL
• Philadelphia, PA
• Tucson, AZ
• Minneapolis/St. Paul, MN
• Multiple communities in Michigan, Ohio, and Texas

This is not a complete list — PFAS have been found in water systems serving an estimated 200+ million Americans.

How to Check If Your Water Is Affected

There are several ways to find out if your drinking water has been tested for PFAS:

• EPA's PFAS Analytic Tools: The EPA has a mapping tool at epa.gov/pfas that shows PFAS monitoring data by location
• Your water utility's annual Consumer Confidence Report (CCR): All public water systems are required to send this annually; the 2025 and 2026 reports will include PFAS data
• Environmental Working Group's PFAS contamination map: ewg.org has a searchable map of PFAS detections
• State environmental agency websites: Most states have PFAS-specific pages with local data
• Independent water testing: For private wells, you must test your own water — see our guide on how to test for PFAS

What Are the Health Risks?

Long-term PFAS exposure through drinking water has been linked to serious health conditions. The EPA's new MCLs were set at such low levels precisely because the evidence shows health effects even at very low concentrations. Conditions linked to PFAS exposure include:

• Kidney cancer
• Testicular cancer
• Thyroid disease
• High cholesterol
• Ulcerative colitis
• Pregnancy-induced hypertension and preeclampsia
• Immune system suppression (including reduced vaccine effectiveness)
• Developmental effects in children and infants

Your Legal Rights

If you were exposed to PFAS through contaminated drinking water and have developed a related health condition, you may have legal claims against the companies that manufactured or used these chemicals.

Major PFAS litigation includes:

• 3M settlement: 3M agreed to pay up to $12.5 billion to settle PFAS water system contamination claims in 2023
• DuPont/Chemours/Corteva settlement: $1.185 billion settlement for water system contamination
• AFFF MDL 2873: Ongoing personal injury claims by individuals who developed cancer from PFAS exposure — in the District of South Carolina

Individual personal injury claims from people who developed cancer or serious illness from PFAS exposure are still actively being litigated. If you or a family member developed kidney cancer, testicular cancer, thyroid disease, or another PFAS-linked condition after years of exposure to contaminated water, you may qualify for compensation.

Find out if you qualify for a PFAS lawsuit →

Private Wells vs. Public Water: Different Risks

Whether your water comes from a public utility or a private well makes a big difference in what you know — and what you can do.

Public water (city or municipal): Utilities are now required to test for PFAS under the new EPA rules and must notify customers of results. Your annual Consumer Confidence Report will include PFAS data starting with the 2025 reporting cycle. If your utility finds PFAS above the new MCLs, it must take action to reduce levels. This process protects you — but utilities have until 2029 to fully comply, which means you could be drinking PFAS-contaminated public water for years while the utility works toward compliance.

Private wells: If you get your water from a private well, you have no legal protection. No agency is required to test your well. No utility will notify you. The only way to know if your water is contaminated is to test it yourself — and the only way to fix it is to take action yourself (filtration or bottled water). People on private wells near military bases, industrial sites, or farms where biosolids were applied face the highest unknown risk.

What to Do Right Now

Regardless of where you live, here are the steps to take if you are concerned about PFAS in your water:

1. Check the EWG database: Visit ewg.org/pfaswater and search your zip code for existing PFAS detection data
2. Get your Consumer Confidence Report: If on public water, request or download your utility's latest annual report
3. Test your well: If on a private well in a risk area, submit a sample to a state-certified lab (EPA Methods 533 or 537.1)
4. Use proper filtration while waiting: Reverse osmosis systems and NSF/ANSI 58-certified filters remove most PFAS. Standard pitcher filters do not.
5. Document everything: Save test results, utility notices, and any communication about PFAS. These records matter if you later develop a health condition and pursue legal action.
6. Talk to your doctor: If you have had long-term PFAS exposure, discuss monitoring for PFAS-linked conditions including kidney function, thyroid levels, and cholesterol.

Sources

• U.S. EPA. "PFAS National Primary Drinking Water Regulation." April 2024. epa.gov/sdwa/pfas-drinking-water-regulation
• U.S. Department of Defense. PFAS site contamination data, 2024.
• Environmental Working Group. PFAS Contamination in the U.S. ewg.org/pfaswater
• ATSDR. "PFAS: Per- and Polyfluoroalkyl Substances." atsdr.cdc.gov