| Allen County Water District | 2.81 µg/L (on 10/31/2019) | KY |
|---|---|---|
| Buckeye Water District - Ohio River | 1.04 µg/L (on 1/16/2019) | OH |
| Conneaut | .657 µg/L (on 1/9/2019) | OH |
| Aqua NJ - Eastern Division | .287 µg/L (on 5/23/2019) | NJ |
| Pottstown Borough Water Auth. | .257 µg/L (on 10/15/2019) | PA |