Endothall
Pennsylvania American Water Company Warren
Endothall is a herbicide used to kill aquatic plants and algae. It's also used on potato and cotton crops.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 8 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 8 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 94 ppb
The EWG Health Guideline of 94 ppb for endothall was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to the stomach and intestines.
EPA Maximum Contaminant
Level (MCL): 100 ppb
The legal limit for endothall, established in 1992, was based on a toxicity study in laboratory animals conducted in the 1960s.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2019-08-27 | 46272501 | ND |
| 2020-04-06 | 22151828.00 | ND |
| 2020-04-15 | 22151856.00 | ND |
| 2020-05-06 | 22347209.00 | ND |
| 2020-05-13 | 22347281.00 | ND |
| 2020-07-08 | 22736942.00 | ND |
| 2020-07-15 | 22736870.00 | ND |
| 2020-08-13 | 22934654.00 | ND |
| 2020-08-19 | 22934682.00 | ND |
| 2023-04-03 | 28837797.00 | ND |
| 2023-04-11 | 28837768.00 | ND |
| 2023-06-06 | 29240273.00 | ND |
| 2023-06-13 | 29240327.00 | ND |
| 2023-08-15 | 29636950.00 | ND |
| 2023-08-16 | 29636979.00 | ND |
| 2023-09-05 | 29827566.00 | ND |
| 2023-09-12 | 29827595.00 | ND |