| East Niles CSD | .38 µg/L (on 12/11/2018) | CA |
|---|---|---|
| Southgate | .103 µg/L (on 3/19/2019) | MI |
| Maysville Utility Commission | .0828 µg/L (on 11/13/2018) | KY |
| City of North Ridgeville | .0606 µg/L (on 3/13/2019) | OH |
| El Paso Water Utilities Public Service B | .059 µg/L (on 10/23/2018) | TX |
| Allen County Water District | .0558 µg/L (on 10/31/2019) | KY |
| Cullman County Water Department | .053 µg/L (on 10/15/2018) | AL |