Endothall
Pendleton Water Association
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 | 2 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 2 | 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 |
|---|---|---|
| 2018-02-20 | 35375979001 | ND |
| 2018-02-20 | 35375979001 | ND |
| 2018-08-06 | 35409599001 | ND |
| 2018-08-06 | 35409599001 | ND |
| 2019-08-07 | 35488972001 | ND |
| 2019-08-07 | 35488972001 | ND |
| 2020-02-10 | 35529911001 | ND |
| 2020-09-22 | 35579669001 | ND |
| 2021-01-20 | 35606276002 | ND |
| 2021-03-08 | 35618673006 | ND |
| 2021-08-18 | 35657244005 | ND |
| 2022-02-21 | 35699244001 | ND |
| 2022-08-29 | 35743858002 | ND |
| 2023-02-27 | 35782747002 | ND |
| 2023-08-07 | 35819671001 | ND |