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 Pfda 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 |
|---|---|---|---|
| Jayuya Urbano | Jayuya | PR | 0.0124 µg/L No EPA limit set |
| Metropolitano | — | — | 0.0075 µg/L No EPA limit set |
| Emmaus Borough Public Water | Emmaus | PA | 0.0070 µg/L No EPA limit set |
| Pico Rivera - City, Water Dept. | Pico Rivera | CA | 0.0056 µg/L No EPA limit set |
| Patillas Urbano | Patillas | PR | 0.0055 µg/L No EPA limit set |
| Pico Wd | Pico Rivera | CA | 0.0051 µg/L No EPA limit set |
| Veolia Water Delaware, Inc | Wilmington | DE | 0.0047 µg/L No EPA limit set |
| Lake Arrowhead Csd | Lake Arrowhead | CA | 0.0039 µg/L No EPA limit set |
| South Montebello Irrigation Dist. | Montebello | CA | 0.0037 µg/L No EPA limit set |
| Payson Town of | Payson | AZ | 0.0035 µg/L No EPA limit set |
| City of Clovis | Clovis | CA | 0.0031 µg/L No EPA limit set |
| Lafayette | La Fayette | GA | 0.0030 µg/L No EPA limit set |
| Manchester Water Department | Manchester | TN | 0.0030 µg/L No EPA limit set |
Frequently asked questions about Pfda
What is Pfda in drinking water?
Pfda 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 Pfda?
The EPA has not set a numeric Maximum Contaminant Level for Pfda. It is still measured and reported, so levels can be compared between suppliers.
How common is Pfda in US tap water?
Of the 9,676 water suppliers with results on file, 13 detected Pfda — 0.1% of those tested.