profenofos is a chemical contaminant that has a reference level of 0.3 µg/L.
| Allen County Water District | .848 µg/L (on 10/31/2019) | KY |
|---|---|---|
| Western Pulaski Co. Water District | .588 µg/L (on 7/13/2020) | KY |
| City of Elko | .52 µg/L (on 1/14/2019) | NV |
| City of North Ridgeville | .464 µg/L (on 3/13/2019) | OH |