| Allen County Water District | .21 µg/L (on 10/31/2019) | KY |
|---|---|---|
| Hardin County Water District #1 | .059 µg/L (on 6/19/2019) | KY |
| Vineland Water & Sewer Utility | .047 µg/L (on 8/30/2018) | NJ |
| Henry County Water & Sewer Authority | .041 µg/L (on 8/6/2019) | GA |
| City of Newark | .0326 µg/L (on 5/8/2019) | OH |