Endothall
Bryan County Rural Water District #9
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 | ND | 12 | 0 | ND |
| 2021 | ND | 6 | 0 | ND |
| 2022 | ND | 5 | 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 |
|---|---|---|
| 2020-03-02 | SDWA-1470003-00 | ND |
| 2020-03-02 | SDWA-1470003-08 | ND |
| 2020-03-02 | SDWA-1470004-00 | ND |
| 2020-03-02 | SDWA-1470004-08 | ND |
| 2020-03-02 | SDWA-1470005-00 | ND |
| 2020-03-02 | SDWA-1470005-08 | ND |
| 2020-03-02 | SDWA-1470054-00 | ND |
| 2020-03-02 | SDWA-1470054-14 | ND |
| 2020-09-01 | SDWA-1516099-00 | ND |
| 2020-09-01 | SDWA-1516100-00 | ND |
| 2020-09-01 | SDWA-1516101-00 | ND |
| 2020-09-01 | SDWA-1516075-00 | ND |
| 2021-09-09 | SDWA-1603650-00 | ND |
| 2021-09-09 | SDWA-1603649-00 | ND |
| 2021-09-09 | SDWA-1603648-00 | ND |
| 2021-11-02 | SDWA-1641421-00 | ND |
| 2021-11-02 | SDWA-1641423-00 | ND |
| 2021-11-02 | SDWA-1641422-00 | ND |
| 2022-03-07 | SDWA-1674251-00 | ND |
| 2022-04-20 | SDWA-1684781-00 | ND |
| 2022-04-20 | SDWA-1684808-00 | ND |
| 2022-04-20 | SDWA-1684832-00 | ND |
| 2022-04-20 | SDWA-1684848-00 | ND |
| 2023-12-15 | SDWA-1859120-00 | ND |