Find PFAS-contaminated water near me

Are 'forever chemicals' in my water?

This map shows public drinking water systems that have recently submitted test results for forever chemicals to the Environmental Protection Agency. Larger spikes indicate higher concentrations.

No PFAS detected 6,758 systems found no detectable amount of 29 types of forever chemicals in their water.
PFAS detected 2,481 water systems detected PFAS, but the annual average wasn't over the limit or they detected only a type the EPA doesn't currently limit.

The following groups may need to act to comply with the EPA's new rule:
PFAS over limit 720 water systems measured chemicals up to three times above the limit when an entire year’s results were averaged.
PFAS well over limit 298 water systems measured forever chemicals from 3 to 86 times over the limit when an entire year’s test results were averaged.

Use two fingers to pan and zoom. Tap for details. Toggle systems with no detections and lower detections using the switches below.

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Sorted by customers served

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Tap a system below for details. Toggle systems with no detections and lower detections using the switches below.

Click on a system below for details. Toggle systems with no detections and lower detections using the switches below.

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Drinking water system	Customers served	Results
CITY OF HOUSTON Houston, TX 2,970,543 customers	2,970,543	PFAS detected Testing detected four chemicals at 16 locations.
MDWASA - MAIN SYSTEM Miami, FL 2,377,460 customers	2,377,460	PFAS well over limit On average, PFOS was measured 7.9 times over the limit at Hialeah WTP.
SAN ANTONIO WATER SYSTEM San Antonio, TX 2,113,151 customers	2,113,151	PFAS detected Testing detected three chemicals at four locations.
WASHINGTON SUBURBAN SANITARY COMMISSION Laurel, MD 1,900,000 customers	1,900,000	PFAS detected Testing detected two chemicals at one location.
CITY OF PHOENIX Phoenix, AZ 1,695,000 customers	1,695,000	PFAS detected Testing detected two chemicals at five locations.
PHILADELPHIA WATER DEPARTMENT Philadelphia, PA 1,600,000 customers	1,600,000	PFAS over limit On average, PFOA was measured 1.8 times over the limit at Queen Lane.
CITY OF BALTIMORE Baltimore, MD 1,600,000 customers	1,600,000	PFAS detected Testing detected one chemical at one location.
LAS VEGAS VALLEY WATER DISTRICT Las Vegas, NV 1,539,277 customers	1,539,277	PFAS detected Testing detected two chemicals at two locations.
EAST BAY MUD Oakland, CA 1,442,800 customers	1,442,800	PFAS detected Testing detected one chemical at two locations.
DALLAS WATER UTILITY Dallas, TX 1,356,479 customers	1,356,479	PFAS detected Testing detected eight chemicals at three locations. The highest single measurement was 1.6 times over the limit.

SOURCE: USA TODAY analysis of the EPA's UCMR 5 data, last updated Jan. 15, 2026

Credits

- Designed and developed by Austin Fast

- Edited by Doug Caruso

- Technical help by Suhail Bhat

Are 'forever chemicals' in my water?

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