Endothall
Stillwater
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 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 15 | 0 | ND |
| 2022 | ND | 17 | 0 | ND |
| 2023 | ND | 1 | 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 |
|---|---|---|
| 2021-08-18 | 4990855 | ND |
| 2021-08-18 | 4990853 | ND |
| 2021-08-18 | 4990851 | ND |
| 2021-08-18 | 4990849 | ND |
| 2021-08-18 | 4990740 | ND |
| 2021-08-18 | 4990738 | ND |
| 2021-08-18 | 4990736 | ND |
| 2021-08-18 | 4990734 | ND |
| 2021-11-19 | 8237-7 | ND |
| 2021-11-19 | 8237-6 | ND |
| 2021-11-19 | 8237-5 | ND |
| 2021-11-19 | 8237-4 | ND |
| 2021-11-19 | 8237-3 | ND |
| 2021-11-19 | 8237-2 | ND |
| 2021-11-19 | 8237-1 | ND |
| 2022-02-08 | 14223-2 | ND |
| 2022-02-08 | 14223-1 | ND |
| 2022-02-08 | 14226-1 | ND |
| 2022-02-08 | 14226-2 | ND |
| 2022-02-08 | 14226-3 | ND |
| 2022-04-21 | 22025-4 | ND |
| 2022-04-21 | 22025-1 | ND |
| 2022-04-21 | 22025-2 | ND |
| 2022-04-21 | 22025-3 | ND |
| 2022-04-21 | 22025-5 | ND |
| 2022-04-21 | 22025-6 | ND |
| 2022-06-08 | 27036-1 | ND |
| 2022-06-08 | 27036-2 | ND |
| 2022-09-20 | 38240-1 | ND |
| 2022-09-20 | 38240-2 | ND |
| 2022-09-20 | 38240-3 | ND |
| 2022-11-22 | 45402-1 | ND |
| 2023-03-07 | 55738-1 | ND |