National Drinking Water Database
National Drinking Water Database - Chemical Contaminants
Perfluorooctane Sulfonate (PFOS)
Status: Unregulated - EPA has not established a maximum legal limit in tapwater for this contaminant.
Detected |
Found above health guidelines |
Found above legal limit |
|
|---|---|---|---|
| States | 1 |
- |
- |
| Water utilities | 1 |
- |
- |
| People Served | 28,000 |
- |
- |
Perfluorooctane Sulfonate (PFOS) Exposure by State
Water utilities in 1 states have reported detecting Perfluorooctane Sulfonate (PFOS) in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.
| State | Water Suppliers with Perfluorooctane Sulfonate (PFOS) contamination | |
|---|---|---|
| Systems | Population | |
| Minnesota | 1 | 28,000 |
| Total | 1 | 28,000 |
The Most Polluted Communities
1 water utilities reported detecting Perfluorooctane Sulfonate (PFOS) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies
Ranked by highest average Perfluorooctane Sulfonate (PFOS) level
| Rank | System | Population Served | Positive test results of total reported tests | Average Level (Range) |
|---|---|---|---|---|
| 1 | Oakdale Oakdale, MN | 28,000 | 40 of 56 | 0.15 ppb (0 to 0.48 ppb) |
Testing Summary for Perfluorooctane Sulfonate (PFOS)
| Are tests routinely required for Perfluorooctane Sulfonate (PFOS) by federal law? | No |
| Water suppliers reporting tests for Perfluorooctane Sulfonate (PFOS) (2005-2008): | 24 of 47,576 |
| Average testing rate for water supplier reporting tests (2005-2008): | 2.1 per year |