Endothall
Upper Hanover Water 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 | 7 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 13 | 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 |
|---|---|---|
| 2020-03-20 | 21847980.00 | ND |
| 2020-03-20 | 21847979.00 | ND |
| 2020-03-20 | 21847981.00 | ND |
| 2020-06-18 | 22417357.00 | ND |
| 2020-06-18 | 22417356.00 | ND |
| 2020-06-18 | 22417358.00 | ND |
| 2020-06-18 | 22417355.00 | ND |
| 2023-02-28 | 28350210.00 | ND |
| 2023-02-28 | 28350211.00 | ND |
| 2023-02-28 | 28350212.00 | ND |
| 2023-05-24 | 28901022.00 | ND |
| 2023-05-24 | 28901021.00 | ND |
| 2023-05-24 | 28901023.00 | ND |
| 2023-08-21 | 29498222.00 | ND |
| 2023-08-21 | 29498221.00 | ND |
| 2023-08-22 | 29498220.00 | ND |
| 2023-11-13 | 30072090.00 | ND |
| 2023-11-13 | 30072088.00 | ND |
| 2023-11-14 | 30072089.00 | ND |
| 2023-11-28 | 30072224.00 | ND |