Endothall
St Charles Water District 1 East Bank
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 | ND | 4 | 0 | ND |
| 2019 | ND | 8 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 5 | 0 | ND |
| 2023 | ND | 4 | 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 |
|---|---|---|
| 2018-01-23 | 35370117001 | ND |
| 2018-01-23 | 35370117001 | ND |
| 2018-07-17 | 35405500001 | ND |
| 2018-07-17 | 35405500001 | ND |
| 2019-01-22 | 35444037001 | ND |
| 2019-01-22 | 35444038001 | ND |
| 2019-01-22 | 35444037001 | ND |
| 2019-01-22 | 35444038001 | ND |
| 2019-07-25 | 35485229002 | ND |
| 2019-07-25 | 35485229001 | ND |
| 2019-07-25 | 35485229002 | ND |
| 2019-07-25 | 35485229001 | ND |
| 2020-03-05 | 35535509001 | ND |
| 2020-03-05 | 35535509002 | ND |
| 2020-11-10 | 35591297001 | ND |
| 2020-11-10 | 35591292001 | ND |
| 2021-01-28 | 35608065001 | ND |
| 2021-01-28 | 35608065002 | ND |
| 2021-10-25 | 35673766001 | ND |
| 2021-10-25 | 35673766002 | ND |
| 2022-02-02 | 35694868001 | ND |
| 2022-02-02 | 35694870001 | ND |
| 2022-08-24 | 35742576001 | ND |
| 2022-08-24 | 35742579001 | ND |
| 2022-08-24 | 35742769001 | ND |
| 2023-03-20 | 35787602001 | ND |
| 2023-03-20 | 35787604001 | ND |
| 2023-11-28 | 35844322001 | ND |
| 2023-11-28 | 35844330001 | ND |