| City of San Angelo | 654.24 µg/L (on 6/18/2019) | TX |
|---|---|---|
| Caseyville | 480.627 µg/L (on 9/26/2018) | IL |
| Village of Fredonia | 99.95 µg/L (on 8/28/2018) | NY |
| Lago Guajataca | 99.92 µg/L (on 9/10/2019) | PR |
| West Wise SUD | 99.89 µg/L (on 6/17/2019) | TX |
| Mayaguez | 99.82 µg/L (on 9/30/2019) | PR |
| Hamilton Waterworks & Sewer Board | 99.79 µg/L (on 6/25/2018) | AL |
| Aqua PA - Shenango Valley | 99.73 µg/L (on 7/18/2018) | PA |
| Augusta-Richmond Co. Water | 99.7 µg/L (on 3/16/2020) | GA |
| Northport Waterworks | 99.6 µg/L (on 5/27/2020) | AL |