Endothall
Okla Ordnance Works Authority
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 | 3 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 3 | 0 | ND |
| 2023 | ND | 2 | 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 |
|---|---|---|
| 2020-04-15 | CD15098-01RE1 | ND |
| 2020-07-29 | CG29059-01 | ND |
| 2020-10-07 | CJ07076-01 | ND |
| 2021-01-13 | DA13061-01 | ND |
| 2021-04-21 | DD21050-01 | ND |
| 2021-07-21 | DG21063-01 | ND |
| 2021-10-27 | DJ27031-01 | ND |
| 2022-02-22 | EB22113-01 | ND |
| 2022-05-04 | EE04051-01 | ND |
| 2022-08-03 | EH03080-01 | ND |
| 2023-02-22 | FB22042-01 | ND |
| 2023-08-16 | FH16083-01 | ND |