perfluorooctanesulfonic acid is a chemical contaminant that is a potential threat to human health.
| Commonwealth Utilities Corp. (Saipan) | 7 µg/L (on 2/22/2015) | MP |
|---|---|---|
| Artesian Water Company | 1.80 µg/L (on 1/28/2014) | DE |
| Security WSD | 1.30 µg/L (on 1/15/2014) | CO |
| Warminster Municipal Authority | 1.09 µg/L (on 6/9/2014) | PA |
| Horsham Water & Sewer Authority | 1 µg/L (on 6/24/2014) | PA |
| Warrington Township Water & Sewer Department | 0.666660 µg/L (on 11/11/2014) | PA |
| Issaquah Water System | 0.60 µg/L (on 7/22/2013) | WA |
| Suffolk County Water Authority | 0.53 µg/L (on 12/29/2014) | NY |
| NASHVILLE, TOWN OF | 0.49 µg/L (on 9/23/2024) | NC |
| Oakdale | 0.4390 µg/L (on 7/14/2015) | MN |
| Hyannis Water System | 0.43 µg/L (on 5/22/2014) | MA |
| GU Waterworks Authority - Northern System | 0.41 µg/L (on 9/27/2015) | GU |
| City of Cleveland Heights | 0.40 µg/L (on 12/9/2015) | OH |
| Emerald Coast Utilities Authority | 0.38 µg/L (on 11/11/2014) | FL |
| United Water PA | 0.3630 µg/L (on 2/4/2014) | PA |
| Oatman Water Company | 0.3 µg/L (on 4/22/2014) | AZ |
| Sanford Water District | 0.29 µg/L (on 4/9/2013) | ME |
| Liberty Water LPSCO | 0.22 µg/L (on 5/29/2014) | AZ |
| Widefield WSD | 0.21 µg/L (on 5/14/2014) | CO |
| Wright-Patterson AFB Area A/C | 0.21 µg/L (on 10/7/2014) | OH |
| VAW Water System, Inc. | 0.18 µg/L (on 2/18/2014) | AL |
| City of Stuart Water Plant | 0.18 µg/L (on 7/7/2014) | FL |
| Freeport | 0.18 µg/L (on 12/10/2014) | IL |
| City of Newburgh | 0.17 µg/L (on 12/30/2013) | NY |
| City of Zephyrhills | 0.16 µg/L (on 4/4/2014) | FL |
| Westfield Water Department | 0.16 µg/L (on 2/27/2013) | MA |
| CA American Water Co. - Suburban | 0.1560 µg/L (on 10/8/2014) | CA |
| ARTONDALE WATER SYSTEM | 0.1536 µg/L (on 4/17/2023) | WA |
| EMMAUS BOROUGH PUBLIC WATER | 0.153 µg/L (on 8/1/2024) | PA |
| City of Tempe | 0.15 µg/L (on 7/16/2013) | AZ |
| New Windsor Consolidated Water District | 0.14 µg/L (on 10/21/2014) | NY |
| La Crosse Waterworks | 0.14 µg/L (on 12/8/2014) | WI |
| Bemidji | 0.1330 µg/L (on 11/12/2014) | MN |
| West Morgan - East Lawrence Water Authority | 0.13 µg/L (on 2/5/2014) | AL |
| NEW MARTINSVILLE | 0.1218 µg/L (on 5/16/2023) | WV |
| Salt River Public Works | 0.12 µg/L (on 2/24/2015) | 09 |
| CA Water Service - Visalia | 0.12 µg/L (on 6/11/2014) | CA |
| Rome | 0.12 µg/L (on 11/11/2015) | GA |
| Dover Water Department | 0.12 µg/L (on 3/24/2014) | NH |
| YESHIVA FARM SETTLEMENT | 0.1060 µg/L (on 10/24/2023) | NY |
| City of Fountain | 0.10 µg/L (on 4/16/2013) | CO |
| Mahwah Water Department | 0.0980 µg/L (on 12/9/2015) | NJ |
| West Lawrence Water Co-op | 0.09 µg/L (on 5/26/2015) | AL |
| City of Greensboro | 0.09 µg/L (on 12/8/2014) | NC |
| City of Martinsburg | 0.0861 µg/L (on 5/14/2014) | WV |
| Eastern Municipal Water District | 0.0820 µg/L (on 6/18/2013) | CA |
| Hampton Bays Water District | 0.0820 µg/L (on 8/19/2014) | NY |
| CITY OF GRAND PRAIRIE | 0.0820 µg/L (on 8/13/2024) | TX |
| ORANGEWOOD WATER SYSTEM | 0.0808 µg/L (on 2/28/2023) | FL |
| Dyer Water Department | 0.0783 µg/L (on 8/13/2014) | IN |