PFAS Contamination by State: Where Forever Chemicals Are Worst
PFAS & Forever Chemicals
PFAS Contamination by State: Where Forever Chemicals Are Worst
PFAS contamination has been confirmed in all 50 states, but certain regions face far greater exposure risks than others. Military bases, industrial facilities, and aging municipal water systems are the primary sources. This guide breaks down which states are most affected, what your actual risk level is, and what you can do about it right now.
For a deep dive into removal technology, see our PFAS Water Filter Buyer's Guide.
The Short Version
PFAS (per- and polyfluoroalkyl substances) contamination is a nationwide problem, but some states are significantly worse than others. Here is what you need to know:
- 9,728 confirmed contamination sites across all 50 states as of March 2026, according to the EWG PFAS contamination map.
- 176 million Americans are served by water systems with detectable PFAS levels.
- Highest-risk states include New Jersey, Michigan, North Carolina, California, Florida, and the broader Mid-Atlantic/Southeast corridor.
- EPA's federal limit for PFOA and PFOS is 4 parts per trillion (ppt), set in April 2024. Several states adopted stricter limits years earlier.
- Private well owners are unprotected by federal PFAS regulations. Testing is your responsibility. A USGS study found PFAS in approximately 45% of U.S. tap water samples, including private wells.
- The fix: Activated carbon filtration, ion exchange, or reverse osmosis can remove PFAS from your drinking water. A whole-house carbon filter or a point-of-use reverse osmosis system ($595) are the most practical options for homeowners.
Check Your PFAS Risk Level
Answer 3 quick questions to assess your household's exposure risk.
What is your water source?
This determines which regulations protect you.
Check Your PFAS Risk Level
Question 2 of 3
Do you live within 5 miles of any of these?
Select the option that best describes your area.
Check Your PFAS Risk Level
Question 3 of 3
Which region are you in?
Some regions have significantly higher contamination rates.
Recommended next steps:
1. Test your water immediately. Standard water tests do not include PFAS. You need a specific PFAS panel from a certified lab.
2. Install a point-of-use filter while you wait for results. A reverse osmosis system removes 90%+ of PFAS compounds.
3. Consider whole-house protection with an activated carbon or ion exchange system for comprehensive coverage.
Recommended next steps:
1. Request your water utility's Consumer Confidence Report (CCR) to see if PFAS has been tested for and detected.
2. Consider proactive testing if your report does not include PFAS data.
3. A point-of-use reverse osmosis system provides reliable protection at the kitchen tap.
Recommended next steps:
1. Stay informed. Check the EWG contamination map periodically as new sites are identified.
2. Consider a carbon filter for general peace of mind. Activated carbon reduces PFAS along with chlorine, VOCs, and other contaminants.
3. If you are on a private well, test at least once since wells are not monitored by any agency.
The National PFAS Picture: How Bad Is It?
PFAS contamination in the United States is not a localized issue. It is a nationwide crisis that has been building for decades. Per- and polyfluoroalkyl substances (commonly called "forever chemicals" because they do not break down in the environment) have been used since the 1940s in nonstick coatings, firefighting foam, food packaging, and hundreds of industrial applications. For a comprehensive overview of PFAS, including health effects, testing, and treatment options, see our Complete PFAS Guide.
The numbers tell a sobering story:
- 9,728 confirmed contamination sites across all 50 states, the District of Columbia, and four U.S. territories (EWG, March 2026).
- 176 million people live in communities where drinking water has tested positive for PFAS.
- 45% of U.S. tap water contains at least one PFAS compound, according to a 2023 USGS study that sampled 716 locations including both public water systems and private wells.
- 678 military installations have known or suspected PFAS contamination from AFFF (aqueous film-forming foam) used in firefighting training.
- 2,501 industrial facilities are known to produce, use, or discharge PFAS compounds.
Why "Forever Chemicals" Are Different
Unlike most water contaminants, PFAS do not break down naturally. They persist in the environment for thousands of years and accumulate in the human body over time. The EPA has linked PFAS exposure to cancer, thyroid disease, immune system suppression, reproductive problems, and developmental delays in children. For a full breakdown of the science, see our PFAS Health Effects guide. This is not a contaminant you can wait out.
The Federal Response
In April 2024, the EPA established the first-ever enforceable limits for PFAS in drinking water:
PFOA
PFOS
PFHxS, PFNA, GenX
PFAS Mixtures
Source: EPA PFAS Drinking Water Regulation, April 2024
Important: The Rules Are Shifting
In May 2025, the EPA announced it will maintain the 4 ppt limits for PFOA and PFOS but extended the compliance deadline from 2029 to 2031. The agency also signaled intent to reconsider the regulations for PFHxS, PFNA, GenX, and the Hazard Index mixture. Water systems are required to begin monitoring by 2027, but full compliance may not be enforced until 2031 or later. If you are relying on your municipal water system to solve this, the timeline is uncertain.
States With the Worst PFAS Contamination
While PFAS has been detected in every state, contamination levels vary enormously based on the concentration of military bases, industrial facilities, and how aggressively each state has tested. The states below consistently rank among the most affected, based on data from the EWG, EPA UCMR 5 monitoring, and state environmental agencies.
New Jersey
CriticalWhy it is so bad: NJ was the first state to set its own PFAS limits (2018-2020), years ahead of the EPA, because contamination was already severe. Dense population, heavy industrial history, and multiple Superfund sites converge here.
Key sites: Chemours/DuPont facilities in Salem County, numerous military installations, and widespread municipal water detections across central and southern NJ.
State action: NJ MCLs of 14 ppt (PFOA) and 13 ppt (PFOS) set in 2018-2020. The "Protecting Against Forever Chemicals Act" signed January 2026 bans PFAS in cosmetics, carpets, and food packaging.
Sources: NJ DEP, EWG
Michigan
CriticalWhy it is so bad: Michigan has some of the highest PFAS groundwater concentrations ever recorded in the U.S. The former Wurtsmith Air Force Base measured groundwater PFAS at 213,000 ppt, more than 50,000 times the EPA limit.
Key sites: Former Wurtsmith AFB (Oscoda), Wolverine World Wide tannery sites (Kent County), Pall Corporation (Ann Arbor), and numerous AFFF-contaminated fire training areas.
State action: Michigan set its own MCLs in August 2020: PFOA 8 ppt, PFOS 16 ppt, PFNA 6 ppt. The state's PFAS Action Response Team (MPART) actively investigates sites statewide.
Sources: Michigan EGLE, MPART, EWG
North Carolina
CriticalWhy it is so bad: The Chemours facility (formerly DuPont) in Fayetteville discharged GenX and other PFAS into the Cape Fear River for decades, contaminating drinking water for hundreds of thousands of residents downstream. Camp Lejeune's PFAS contamination compounds the problem.
Key sites: Chemours Fayetteville Works, Camp Lejeune Marine Corps Base, multiple municipal systems along the Cape Fear River basin, and 111 total PFAS detections statewide.
State action: NC set a health goal of 140 ppt for GenX (non-enforceable). The state relies on the federal EPA MCLs for PFOA and PFOS.
Sources: NC DEQ, EWG, EPA
California
HighWhy it is so bad: California's combination of military bases (29 Palms, Camp Pendleton, Edwards AFB, many others), aerospace manufacturing, and massive population means widespread exposure. 103 PFAS detections statewide.
Key sites: Edwards Air Force Base, George AFB, multiple aerospace/defense manufacturing facilities, and municipal water systems in the Los Angeles basin, Orange County, and the San Francisco Bay Area.
State action: California set notification levels (not enforceable limits) of 5.1 ppt for PFOA and 6.5 ppt for PFOS in 2022. Response levels triggering mandatory action are 10 ppt (PFOA) and 40 ppt (PFOS).
Sources: CA State Water Board, EWG
Florida
HighWhy it is so bad: Florida has one of the highest state-level detection counts at 119 sites, driven by military bases (Naval Air Station Jacksonville, Eglin AFB, Tyndall AFB), fire training facilities, and landfill leachate in a state with high water tables.
Key sites: NAS Jacksonville, Eglin AFB, Patrick Space Force Base, numerous fire departments, and municipal water systems throughout the state.
State action: Florida has not set state-specific PFAS limits. The state defers to federal EPA standards.
Sources: FL DEP, EWG, DoD
Massachusetts
HighWhy it is so bad: Military bases (Otis Air National Guard Base on Cape Cod), industrial manufacturing, and fire training facilities have contaminated groundwater in a state where many communities rely on well-sourced public water supplies.
Key sites: Otis ANGB/Joint Base Cape Cod, industrial sites in the Merrimack Valley, and numerous municipal water detections across eastern Massachusetts.
State action: Massachusetts set a combined MCL of 20 ppt for the sum of six PFAS compounds (PFAS6), effective October 2020. One of the earlier and more protective state standards.
Sources: MassDEP, EWG
New Hampshire
HighWhy it is so bad: The contamination at Pease Air Force Base in Portsmouth became one of the most publicized PFAS cases in the nation. Elevated PFAS levels were found in the base's water supply, affecting thousands of workers and nearby residents.
Key sites: Former Pease AFB (Portsmouth), Saint-Gobain Performance Plastics (Merrimack), and multiple public water system detections across southern New Hampshire.
State action: NH proposed MCLs of 12 ppt (PFOA), 15 ppt (PFOS), 18 ppt (PFHxS), and 11 ppt (PFNA) in 2019, but enforcement was blocked by court injunction. The federal EPA limits now apply.
Sources: NH DES, EWG, ATSDR
Pennsylvania
HighWhy it is so bad: The Willow Grove and Horsham military installations in Bucks and Montgomery counties contaminated drinking water for surrounding communities. Industrial PFAS use in manufacturing compounds the problem statewide.
Key sites: Former Naval Air Station Joint Reserve Base Willow Grove, Horsham Air Guard Station, multiple firefighting training sites, and industrial facilities.
State action: PA set MCLs of 14 ppt (PFOA) and 18 ppt (PFOS) in January 2023, ahead of the federal EPA rule.
Sources: PA DEP, EWG
New York
ElevatedWhy it is so bad: Dense population, heavy industrial history, military bases (Stewart Air National Guard Base), and fire training sites across Long Island and upstate New York.
Key sites: Hoosick Falls (industrial contamination), Newburgh (Stewart ANGB), and multiple Long Island water systems affected by AFFF contamination.
State action: NY set MCLs of 10 ppt each for PFOA and PFOS in August 2020.
Sources: NY DEC, EWG
Virginia
ElevatedWhy it is so bad: Home to some of the largest military installations in the country (Naval Station Norfolk, Joint Base Langley-Eustis, Fort Barfoot, Quantico), Virginia faces contamination from decades of AFFF firefighting foam use.
Key sites: Naval Station Norfolk, Langley AFB, the Pentagon, Quantico Marine Corps Base, and Fentress Naval Auxiliary Landing Field.
State action: Virginia defers to federal EPA MCLs. No state-specific PFAS drinking water standards as of 2026.
Sources: VA DEQ, DoD, EWG
Georgia
ElevatedWhy it is so bad: Georgia recorded 127 PFAS detections statewide, the second highest in the country. Robins Air Force Base, multiple industrial facilities, and contamination from carpet manufacturing in Dalton contribute.
Key sites: Robins AFB (Warner Robins), carpet manufacturing facilities in northwest Georgia, and multiple municipal systems in metro Atlanta.
State action: Georgia defers to federal EPA standards. No state-specific PFAS limits.
Sources: GA EPD, EWG, EPA UCMR 5
Ohio
ElevatedWhy it is so bad: Wright-Patterson Air Force Base, heavy industrial manufacturing, and municipal water contamination in multiple regions. Ohio's industrial legacy makes it one of the more affected Midwest states.
Key sites: Wright-Patterson AFB (Dayton), industrial facilities in the Ohio River valley, and municipal water systems in Columbus, Cincinnati, and Cleveland areas.
State action: Ohio adopted PFAS action levels (non-enforceable) of 70 ppt for PFOA and PFOS combined. Federal EPA MCLs now supersede this.
Sources: Ohio EPA, EWG
Not on this list?
PFAS has been detected in all 50 states. Even if your state is not listed above, contamination may exist in your area. The EWG's interactive PFAS contamination map and the USGS tap water dashboard let you search by location. States like Alabama (96 detections), Maryland (134 detections), South Carolina, and Louisiana also show significant contamination.
Where PFAS Comes From: Major Source Types
Understanding how PFAS enters the water supply helps you assess your personal risk. There are four primary contamination pathways, each associated with specific types of sites in your area.
Military Bases & Airports
The Department of Defense has identified 700+ contaminated military sites requiring cleanup. AFFF (aqueous film-forming foam) was used for decades in firefighting training exercises, crash response, and fuel fire suppression. This foam, loaded with PFOS and PFOA, was sprayed directly onto the ground and washed into groundwater. Bases like Wurtsmith AFB (MI), Camp Lejeune (NC), and Pease AFB (NH) are among the worst cases. Civilian airports with fire training areas face similar issues.
Industrial Manufacturing
EWG has mapped 2,501 industrial facilities that produce, use, or are suspected of discharging PFAS. These include chemical manufacturers (Chemours, 3M, DuPont), textile and carpet manufacturers, electronics factories, chrome plating facilities, and paper mills. Industrial PFAS enters water through direct discharge to rivers, air emissions that settle into soil and water, and wastewater treatment plants that cannot remove PFAS.
Landfills & Wastewater Plants
Landfills that accepted PFAS-containing products (nonstick cookware, treated fabrics, food packaging) leach PFAS into groundwater through rainfall percolation. Wastewater treatment plants are another pathway: they receive PFAS from household and industrial sources but cannot remove it with conventional treatment. The treated water discharged back into rivers and the biosolids (sludge) spread on agricultural land both carry PFAS into the environment.
Fire Departments & Training Sites
Municipal fire departments and industrial fire brigades used AFFF foam for decades. Fire training facilities where foam was repeatedly sprayed are concentrated contamination sources. Unlike military bases, these sites are scattered throughout communities, often near residential areas. Many local fire stations have measurable PFAS in nearby groundwater. Some states have now banned PFAS-containing firefighting foam, but the legacy contamination remains in the soil and groundwater.
The common thread: PFAS enters groundwater and surface water from the source, then migrates through aquifers and waterways, sometimes traveling miles from the original contamination site. A well or municipal water intake does not need to be directly adjacent to a contamination source to be affected.
How to Check If You Are Near a Contamination Site
Determining your actual exposure risk takes three steps: check the maps, check your water system's data, and (if necessary) test your own water.
Step 1: Check the Contamination Maps
These free tools let you search by address or ZIP code:
- EWG PFAS Contamination Map shows 9,728 confirmed sites including military bases, industrial facilities, water utilities, and other known contamination sources.
- USGS PFAS Tap Water Dashboard shows sampling results from the 2023 USGS study with risk probability estimates by region.
- EPA PFAS Analytic Tools provides data on PFAS dischargers, monitoring results, and enforcement actions from the EPA's compliance database.
- ATSDR PFAS Sites Map shows locations where the Agency for Toxic Substances and Disease Registry is investigating PFAS in the environment.
Step 2: Request Your Water Utility's Data
If you are on municipal water, your utility is required to publish an annual Consumer Confidence Report (CCR). Contact them directly and ask:
- Has the system been tested for PFAS under UCMR 5?
- What were the results (in parts per trillion)?
- What treatment, if any, is being implemented?
If your utility has not yet tested (UCMR 5 monitoring must be completed by 2027), you will need to test on your own.
Step 3: Test Your Water
Standard Water Tests Do Not Include PFAS
The typical well water or municipal water test checks for bacteria, minerals, pH, and common contaminants. PFAS requires a specialized panel that must be analyzed by a lab certified for EPA Method 533 or 537.1. These tests typically cost $200 to $400. Ask the lab specifically for PFAS analysis; do not assume a "comprehensive" water test includes it. For a complete walkthrough of testing options, costs, and how to read your lab report, see our PFAS Testing Guide.
Private well owners should be especially proactive. Federal PFAS regulations apply only to public water systems. If you are on a well, no government agency is monitoring your water for PFAS. The USGS study found that PFAS concentrations in private wells were statistically similar to those in public water supplies, meaning well water is just as likely to be contaminated.
State PFAS Regulations: Who Is Ahead of the EPA?
Several states established their own PFAS drinking water standards years before the EPA acted in 2024. The table below compares state limits against the federal standard. A lower number means stricter protection.
| State | PFOA Limit (ppt) | PFOS Limit (ppt) | Other PFAS | Year Enacted | Status |
|---|---|---|---|---|---|
| Federal EPA | 4 | 4 | 10 ppt each for PFHxS, PFNA, GenX | 2024 | Enforceable by 2029-2031 |
| New Jersey | 14 | 13 | PFNA: 13 ppt | 2018-2020 | Enforceable (federal now stricter) |
| Michigan | 8 | 16 | PFNA: 6 ppt, PFHxS: 51 ppt, GenX: 370 ppt | 2020 | Enforceable |
| Massachusetts | 20 ppt combined (sum of 6 PFAS) | Includes PFOA, PFOS, PFHxS, PFNA, PFHpA, PFDA | 2020 | Enforceable | |
| New Hampshire | 12 | 15 | PFHxS: 18 ppt, PFNA: 11 ppt | 2019 | Under court injunction; federal applies |
| New York | 10 | 10 | 1,4-Dioxane: 1 ppb (related contaminant) | 2020 | Enforceable |
| Pennsylvania | 14 | 18 | None yet | 2023 | Enforceable |
| California | 5.1 (NL) / 10 (RL) | 6.5 (NL) / 40 (RL) | Notification & Response levels only | 2022 | Advisory (not enforceable MCLs) |
| North Carolina | No state MCL for PFOA/PFOS | GenX: 140 ppt (health goal, non-enforceable) | 2017 | Advisory only; federal applies | |
NL = Notification Level. RL = Response Level. Sources: Individual state environmental agencies, EPA.
What This Means for You
If your state has its own enforceable PFAS limits, your water utility must comply with whichever standard is stricter: the state limit or the federal EPA limit. In most cases, the federal EPA's 4 ppt limit for PFOA and PFOS is now the strictest standard. But here is the catch: compliance enforcement may not begin until 2029 to 2031, depending on regulatory changes. Your water may exceed these limits today with no immediate requirement for your utility to fix it. Testing your own water and installing a home filtration system is the fastest path to protection.
What to Do If You Are in a High-Risk Area
If you are near known contamination sites, in a high-risk state, or your water test shows PFAS above 4 ppt, here is the practical action plan.
Am I at Risk? Quick Checklist
If two or more apply to you, water testing for PFAS is strongly recommended.
Treatment Options That Actually Remove PFAS
Not all water filters remove PFAS. Standard sediment filters, water softeners, UV purifiers, and boiling will do nothing for PFAS. The three treatment technologies proven to reduce PFAS are:
| Technology | PFAS Removal | Coverage | Best For | Cost Range |
|---|---|---|---|---|
| Activated Carbon Filtration | Removes longer-chain PFAS (PFOA, PFOS) effectively. Less effective on shorter-chain variants. | Whole house | General PFAS reduction combined with chlorine, taste, and odor improvement | $695 - $995 |
| Ion Exchange (PFAS-Specific Resin) | Removes broad spectrum of PFAS including shorter-chain compounds. 95%+ removal for most PFAS. | Whole house | Confirmed PFAS contamination, high-risk areas, broadest PFAS coverage | $1,695 |
| Reverse Osmosis | 90%+ removal of all PFAS compounds at the point of use. | Under-sink (drinking/cooking water) | Affordable first step, kitchen tap protection, renters | $595 |
For more detail on each approach, see our complete PFAS water filter guide. If you are not sure which system fits your situation, call Aidan at 800-460-5810 with your water test results and he will walk you through the options.
The Practical Approach
If you want protection now and are not sure what PFAS level you have, start with a reverse osmosis system at the kitchen sink ($595). It covers 90%+ of all PFAS compounds for your drinking and cooking water. If testing later confirms high levels or you want whole-house coverage, you can add a dedicated PFAS ion exchange system ($1,695) or a whole-house carbon filter to the main line.
Frequently Asked Questions
What states have the worst PFAS contamination?
Based on total contamination sites and severity, New Jersey, Michigan, and North Carolina consistently rank as the most affected. California, Florida, Massachusetts, New Hampshire, and Pennsylvania also have significant contamination. EWG data from March 2026 shows 9,728 confirmed PFAS contamination sites across all 50 states, with the Southeast and Mid-Atlantic regions showing especially high concentrations.
Does boiling water remove PFAS?
No. Boiling water does not remove PFAS. In fact, boiling concentrates PFAS because the water evaporates while the chemicals remain behind. The only proven home treatment methods for PFAS are activated carbon filtration, ion exchange resin systems, and reverse osmosis.
How do I test my water for PFAS?
Standard home water tests do not include PFAS. You need to send a sample to a lab certified for EPA Method 533 or Method 537.1. Testing typically costs $200 to $400. If you are on municipal water, you can also request your utility's UCMR 5 monitoring results or their annual Consumer Confidence Report. Private well owners must arrange their own testing since there is no federal PFAS monitoring requirement for private wells.
Are Brita or pitcher filters effective against PFAS?
Most standard pitcher filters provide minimal PFAS reduction. Some newer pitcher and faucet-mount filters with activated carbon or ion exchange media claim partial PFAS reduction, but they typically remove far less than a dedicated under-sink reverse osmosis system or a whole-house carbon filter. For confirmed PFAS contamination, a pitcher filter is not a reliable solution.
Is PFAS contamination getting better or worse?
The detection of PFAS contamination is increasing as more testing is conducted, but the contamination itself has been building for decades. EPA's UCMR 5 program (2023 to 2025) is the first nationwide monitoring effort, so many sites are being identified for the first time. Because PFAS does not break down naturally, existing contamination will persist indefinitely without active remediation. New PFAS production is being phased out in some applications, but legacy contamination in soil and groundwater will continue to affect water supplies for the foreseeable future.
What is the EPA PFAS limit for drinking water?
The EPA set the first enforceable PFAS limits in April 2024: 4 parts per trillion (ppt) for PFOA and 4 ppt for PFOS individually, plus 10 ppt each for PFHxS, PFNA, and GenX. In May 2025, the EPA confirmed it will maintain the PFOA/PFOS limits but extended the compliance deadline to 2031 and signaled it may reconsider the limits for the other three compounds. Public water systems must begin monitoring by 2027.
Does a whole-house carbon filter remove PFAS?
Yes, activated carbon filters are effective at removing longer-chain PFAS compounds like PFOA and PFOS. They are less effective against shorter-chain PFAS variants. For comprehensive PFAS removal across all compound types, an ion exchange resin system ($1,695) or reverse osmosis ($595) provides broader coverage. A whole-house carbon filter is still a strong choice because it also handles chlorine, VOCs, taste, and odor while reducing PFAS.
Can I get PFAS from my shower water?
PFAS exposure through skin absorption during showering is considered minimal compared to ingestion. The primary risk from PFAS is through drinking and cooking with contaminated water. That said, if you have confirmed high PFAS levels and want comprehensive protection, a whole-house filtration system treats all water entering your home, including showers, laundry, and kitchen taps.
About the Author: Aidan Walsh has over 30 years of experience in residential water treatment. He has helped thousands of homeowners across the United States identify contaminants in their water and select the right treatment systems. For personalized guidance on PFAS filtration, call Aidan directly at 800-460-5810.