What the EPA limit means
No federal limit
The EPA has not set an enforceable numeric limit for this contaminant.
—
Health goal (MCLG) — the level with no known health effect. It is a goal, not a legal limit, and is often zero for carcinogens.
UCMR-5
Where these measurements come from. Hover the tag for the EPA programme and years.
Where PFHXS was found
The water suppliers reporting the highest levels, worst first. For lead and copper that is the 90th-percentile result the action level is written against; for Six-Year Review data, the 95th percentile of each system's samples.
| Supplier | City | State | Level vs EPA limit |
|---|---|---|---|
| Bayleaf Master | Raleigh | NC | 0.1526 µg/L No EPA limit set |
| Running Springs Water District | Running Springs | CA | 0.0955 µg/L No EPA limit set |
| Gwa Northern Water System | Tumon | GU | 0.0800 µg/L No EPA limit set |
| Tempe City of | Tempe | AZ | 0.0705 µg/L No EPA limit set |
| Great Bend, City of | Great Bend | KS | 0.0600 µg/L No EPA limit set |
| City of Atwater | Atwater | CA | 0.0590 µg/L No EPA limit set |
| Artondale | Tacoma | WA | 0.0558 µg/L No EPA limit set |
| Emerald Coast Utilities Authority (Ecua) | Pensacola | FL | 0.0553 µg/L No EPA limit set |
| Moses Lake City of | Moses Lake | WA | 0.0541 µg/L No EPA limit set |
| Yeshiva Farm Settlement | New Castle | NY | 0.0516 µg/L No EPA limit set |
| Augusta-Richmond Co Ws | Augusta | GA | 0.0512 µg/L No EPA limit set |
| Quistorff | Tacoma | WA | 0.0440 µg/L No EPA limit set |
| Ocala, City of (2 Wtps) | Ocala | FL | 0.0420 µg/L No EPA limit set |
| Hawley Wsc | Hawley | TX | 0.0364 µg/L No EPA limit set |
| Big Bear City Csd | Big Bear City | CA | 0.0360 µg/L No EPA limit set |
| Sioux City Water Supply | Sioux City | IA | 0.0350 µg/L No EPA limit set |
| Nashville, Town of | Nashville | NC | 0.0350 µg/L No EPA limit set |
| Sauk Rapids | Sauk Rapids | MN | 0.0342 µg/L No EPA limit set |
| Atascadero State Hospital | Atascadero | CA | 0.0340 µg/L No EPA limit set |
| Fort Campbell Water System | — | KY | 0.0336 µg/L No EPA limit set |
| Emmaus Borough Public Water | Emmaus | PA | 0.0332 µg/L No EPA limit set |
| City of Abilene | Abilene | TX | 0.0324 µg/L No EPA limit set |
| Duxbury Water Department | Duxbury | MA | 0.0310 µg/L No EPA limit set |
| Independence Township | Clarkston | MI | 0.0300 µg/L No EPA limit set |
| City of Fresno | Fresno | CA | 0.0300 µg/L No EPA limit set |
Frequently asked questions about PFHXS
What is PFHXS in drinking water?
PFHXS is monitored in US public drinking water under EPA rules. Each supplier's result is reported to the EPA and published here with its source and period.
Does the EPA limit PFHXS?
The EPA has not set a numeric Maximum Contaminant Level for PFHXS. It is still measured and reported, so levels can be compared between suppliers.
How common is PFHXS in US tap water?
Of the 9,676 water suppliers with results on file, 970 detected PFHXS — 10% of those tested.