Endothall
Vivian Water System
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 | 4 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 3 | 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 |
|---|---|---|
| 2019-02-18 | 35449625001 | ND |
| 2019-02-18 | 35449625001 | ND |
| 2019-07-25 | 35485237001 | ND |
| 2019-07-25 | 35485237001 | ND |
| 2020-02-11 | 35530385001 | ND |
| 2020-08-04 | 35567924001 | ND |
| 2020-08-04 | 35567926001 | ND |
| 2020-09-21 | 35579697001 | ND |
| 2021-01-05 | 35602530001 | ND |
| 2021-08-10 | 35655130001 | ND |
| 2022-02-14 | 35697796001EF | ND |
| 2023-01-30 | 35776976005 | ND |
| 2023-08-15 | 35821489001 | ND |
| 2023-12-12 | 35848285001 | ND |