PFAS Contamination Map: Is Your Zip Code Affected?

PFAS Contamination Map: Is Your Zip Code Affected?

You've seen the headlines about "forever chemicals" in drinking water. You know PFAS contamination is a real problem affecting millions of Americans. But the question that actually matters to you is simpler: Is my water safe?

That used to be surprisingly hard to answer. Crystal Quest's free PFAS Contamination Map changes that. Search by zip code or address and see exactly what's been found near you, pulled from nearly 10,000 contamination sites across the country. It's one of the most detailed PFAS lookup tools available anywhere.

In this guide, we'll walk you through how to use the map, what your results actually mean, and what you can do right now to protect your household.

Key Takeaways

How to Check Your Zip Code for PFAS

Knowing what's in your water starts with looking. And the good news is, it takes about 30 seconds.

Use Crystal Quest's PFAS Contamination Map

Crystal Quest built a free interactive PFAS contamination map that pulls data from EPA UCMR 5 monitoring results and Department of Defense records. It covers nearly 10,000 known contamination sites across the United States.

Here's how to check your area:

1. Visit the Map

   Go to the Crystal Quest PFAS Map page.

2. Search Your Location

   Enter your zip code or street address in the search bar.

3. Browse the Results

   Each dot on the map represents a known contamination site. Toggle between heatmap view and state overlay to see patterns in your region.

4. Click for Details

   Click any dot to open a side panel showing the site name, location, specific PFAS compounds detected, concentration levels in parts per trillion (ppt), and how those levels compare to EPA limits.

The map includes four site categories:

• Military sites where AFFF firefighting foam was used
• Sites above the EPA MCL where PFAS exceeds federal limits
• Sites below the EPA MCL where PFAS was detected but under the limit
• Other known contamination sites from various sources

Check Supplementary Sources

The Crystal Quest map is your best starting point, but other sources can fill in gaps:

EPA UCMR 5 Data Portal: The EPA's Unregulated Contaminant Monitoring Rule required water systems to test for 29 PFAS compounds between 2023 and 2025. You can search by state and water system name on the EPA's data portal for the raw test results.

State Environmental Databases: Many states maintain their own contamination databases with local detail that may include more recent data.

Your Water Utility's Consumer Confidence Report (CCR): Your utility publishes an annual water quality report. Find your utility on your water bill, visit their website, and search for "PFAS" in the report. This gives you the most direct information about what's actually flowing through your pipes at home.

Understanding the Map Data

Pull up the map, and you'll see colored dots, concentration numbers, and acronyms. It can feel like reading a foreign language. Let's break down what you're actually looking at.

Current EPA Limits for PFAS in Drinking Water

The EPA finalized enforceable maximum contaminant levels (MCLs) for PFAS in April 2024. These replaced the old 70 ppt health advisory that had been the reference point for years.

The newer limits are dramatically stricter:

How small is 4 parts per trillion? Imagine filling a 25-meter lap pool with clean water, then squeezing in a single eyedropper's worth of PFAS. That's the neighborhood of 4 ppt. The EPA set the bar that low because decades of research have linked long-term PFAS exposure to cancer, thyroid disease, immune system effects, and reproductive issues. Even tiny concentrations add up when you're drinking the water every day.

Detected vs. Exceeds MCL

Two categories matter most when reading your results:

Detected but below the MCL: PFAS compounds were found, but at levels under the EPA limit. Your water system is currently in compliance. That said, any detection means PFAS is present in your source water, and those compounds don't break down on their own.

Exceeds the MCL: PFAS was found above federal limits. Water systems in this category must take action to reduce levels. If this is your area, don't wait for the utility to fix it. Point-of-use filtration gives you control over what reaches your glass right now.

Which PFAS Compounds Show Up

PFAS (per- and polyfluoroalkyl substances) isn't a single chemical. It's a family of over 14,000 synthetic compounds, all built around a carbon-fluorine bond that's one of the strongest in chemistry. That bond is exactly why these chemicals don't break down in nature, in water treatment plants, or in your body. Maps and test reports usually focus on the most studied ones:

• PFOA: Historically used in manufacturing non-stick coatings
• PFOS: Found in aqueous film-forming foams (AFFF) used by the military and at airports
• PFHxS, PFNA, PFBS, GenX: Newer replacements now showing up in water supplies

The Crystal Quest map's side panel shows you exactly which compounds were detected at each site, with their concentration in ppt and the applicable EPA MCL. Pay close attention to whether you're seeing one compound or several. Multiple detections at one site can trigger the Hazard Index rule even if each individual compound is technically below its own limit.

Highest-Risk Areas for PFAS Contamination

PFAS contamination isn't random. It follows specific sources. If you live near any of the locations below, checking the map isn't just a good idea. It should be a priority.

Military Bases and Airfields

Military installations are some of the most heavily contaminated PFAS sites in the entire dataset. The reason is straightforward: for decades, the Department of Defense used AFFF (aqueous film-forming foam) for fire training exercises and emergency response. AFFF is incredibly effective at smothering jet fuel fires. It's also loaded with PFOS and PFOA.

The scale of this problem is staggering. The DoD has identified over 700 installations where AFFF was used or stored. At some sites, the contamination levels aren't just over the limit. They're orders of magnitude beyond it. Peterson Space Force Base in Colorado recorded PFOS levels above 200,000 ppt. Former England Air Force Base in Louisiana showed PFOS concentrations exceeding 20 million ppt in groundwater near fire training areas. For reference, the EPA limit is 4 ppt.

And these chemicals don't stay inside the fence line. PFAS from AFFF seeps into groundwater and can travel through aquifers for miles. Communities 5 to 10 miles from a base have found their drinking water wells contaminated. The Crystal Quest map flags military sites in their own category specifically because these locations carry the highest concentrations in the dataset.

Industrial Manufacturing Zones

Factories involved in electroplating, semiconductor production, textile treatment, and food packaging have used PFAS compounds in their processes for decades. Unlike a one-time spill, this was routine. PFAS went into the wastewater stream daily, year after year.

The result is contamination plumes that spread through soil and groundwater over large areas. Chemical manufacturing plants that actually produced PFAS compounds are the worst offenders: facilities in states like North Carolina, West Virginia, and Michigan have contaminated waterways and drinking water sources serving hundreds of thousands of people. But even factories that simply used PFAS in their manufacturing processes created significant contamination through discharge and disposal.

If you're near an industrial zone, especially one that's been operating since the 1970s or earlier, there's a good chance PFAS was part of the process. Check the map to see if testing has been done in your area.

Landfills and Waste Sites

Here's something most people don't think about: every stain-resistant carpet, every non-stick pan, every waterproof jacket that gets thrown away ends up in a landfill. PFAS doesn't disappear just because you tossed it in the trash. Rain percolates through landfill waste, picks up those PFAS compounds, and creates what's called leachate, a contaminated liquid that seeps downward.

Modern landfills have liner systems designed to capture leachate. Older landfills, especially those built before the 1990s, often don't. And even lined landfills aren't perfect. The EPA has documented PFAS in leachate at concentrations ranging from hundreds to tens of thousands of parts per trillion. That leachate can reach groundwater, which can reach your well or your community's water supply.

If there's a landfill within a few miles of your home, particularly an older one, the map is worth a careful look.

Why "Not Detected" Doesn't Mean "Not Present"

This might be the most important section of this entire guide. A blank spot on the map can feel reassuring. But a blank spot may just mean nobody has looked yet.

Testing Gaps Are Common

Small water systems serving fewer than 10,000 people weren't required to participate in UCMR 5 testing. Think about that for a moment. Thousands of rural and small-town water systems across the country have never tested for PFAS. If your area shows nothing on the map, it could simply mean no data exists yet. That's very different from a clean bill of health.

Private Wells Are Not Included

PFAS maps show data from public water systems. If you rely on a private well, your water isn't in any public database. Nobody is monitoring it for PFAS. Nobody is required to. You're responsible for your own testing.

That's not meant to scare you. It's meant to be clear: if you live near a military base, industrial site, or landfill and you're on a private well, testing your well water is one of the smartest things you can do. The map can tell you whether contamination sources are nearby. A test can tell you whether they've reached your tap.

Not All PFAS Compounds Are Tested

Most testing programs cover 6 to 29 PFAS compounds. Over 14,000 exist. That means current testing is like checking a few rooms in a very large building. Untested compounds may be present in your water but wouldn't show up in any report.

What to Do If PFAS Is Found in Your Area

Finding PFAS on the map can feel unsettling. But here's what matters: you now know. And knowing puts you in a position to do something about it. Effective solutions exist, and they're more accessible than most people realize.

Step 1: Get Your Water Tested

If you want to know exactly what's in your water, a lab test is the clearest path. Crystal Quest offers water testing kits that identify specific PFAS compounds and their concentrations. For private well owners, this step isn't optional. It's essential.

If you're on municipal water, your utility's annual report is a useful starting point. But keep in mind: that report shows what leaves the treatment plant, not necessarily what arrives at your kitchen faucet. Aging pipes and distribution system issues can affect what you're actually drinking. An independent test at the tap removes the guesswork.

Step 2: Understand Your Filtration Options

Two technologies have proven most effective at removing PFAS from drinking water:

Reverse osmosis (RO) pushes water through a membrane with pores so fine that if a human hair were a highway, these pores would be a hairline crack in the sidewalk. Only water molecules are small enough to slip through. Everything else, including PFAS, gets left behind. RO systems remove 90 to 99% of PFAS compounds. Crystal Quest offers both under-sink RO systems for drinking water and whole-house RO systems for total home coverage.

Activated carbon filtration works through adsorption: as water flows through the carbon media, PFAS molecules stick to the surface, similar to how a magnet pulls iron filings from sand. High-quality carbon block filters are effective against many PFAS compounds, especially PFOA and PFOS. Learn more about how carbon filters handle PFAS.

For a deeper comparison, our PFAS filtration guide breaks down which technology fits different situations. You can also read about why reverse osmosis is effective for PFAS if you want the technical details.

Step 3: Choose the Right System for Your Situation

Not sure which direction is right for your home? Crystal Quest's filter recommendation tool can narrow it down based on your specific water concerns. And our water specialists are always available to review your test results and recommend the right setup. They've helped thousands of homeowners work through exactly this decision.

Take Control of Your Water Quality

PFAS contamination is a serious issue. But it's not one where you're stuck waiting for someone else to solve it. The first step is knowing what's in your water. The second is choosing the right protection. You can do both today.

Start by checking your area on Crystal Quest's PFAS Contamination Map. Then explore Crystal Quest's PFAS water filtration systems, built in the USA with over 30 years of water treatment experience.

Need help figuring out the right solution for your home? Our water specialists can walk you through your options and match a system to your test results. Contact Crystal Quest to get personalized guidance.

Frequently Asked Questions

How accurate is the Crystal Quest PFAS map?

The map pulls directly from EPA UCMR 5 monitoring data and Department of Defense records covering nearly 10,000 sites. It reflects official testing results reported to federal agencies. Keep in mind that the map shows what's been tested and reported. Areas without data may simply lack testing coverage, not contamination.

Can PFAS from one area contaminate a neighboring zip code?

Absolutely. PFAS moves through groundwater over time and can travel miles from the original source. If a contamination site shows up near the edge of your zip code, your water supply could still be affected, especially if you share the same aquifer or water system. Zip code boundaries don't stop groundwater flow.

What is the difference between PFOA and PFOS?

Both are legacy PFAS compounds, but they come from different uses. PFOA was primarily used in manufacturing non-stick coatings. PFOS was the main compound in AFFF firefighting foams used at military bases and airports. Both have individual EPA MCLs of 4 ppt, and both are among the most commonly detected PFAS in drinking water.

Will boiling water remove PFAS?

No. PFAS are extremely heat-stable, which is exactly why they're called "forever chemicals." Boiling actually makes the problem worse by concentrating PFAS as water evaporates. You need filtration, either reverse osmosis or quality activated carbon, to reduce PFAS levels in your drinking water. Learn more about PFAS in drinking water.

How much does private well PFAS testing cost?

PFAS testing typically runs $250 to $500 per sample, depending on how many compounds are included. Some states offer subsidized testing for private well owners. Crystal Quest also offers water testing options to help you identify what's in your water. Given the potential health implications, it's one of the most worthwhile investments a well owner can make.

Are pitcher filters effective against PFAS?

Standard pitcher filters aren't designed for PFAS removal. Some newer models with specialized media can reduce certain PFAS compounds, but they don't match the performance of reverse osmosis or high-quality carbon block systems. If PFAS is your concern, a dedicated filtration system is the more reliable choice. See our PFAS filtration guide for a full comparison.

What are the signs that PFAS might be in my water?

There aren't any visible signs. PFAS is odorless, tasteless, and invisible. You can't see it, smell it, or taste it. That's what makes it so difficult to detect without testing. The only reliable way to know is to check the contamination map for nearby sources and then get your water tested. Read more about signs of PFAS in tap water to understand the risk factors for your area.