Endothall
Altoona 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 | 12 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 10 | 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 |
|---|---|---|
| 2020-05-18 | 22286929.00 | ND |
| 2020-05-18 | 22286902.00 | ND |
| 2020-05-18 | 22286956.00 | ND |
| 2020-05-21 | 22483931.00 | ND |
| 2020-05-21 | 22483985.00 | ND |
| 2020-05-21 | 22483957.00 | ND |
| 2020-07-15 | 22676312.00 | ND |
| 2020-07-15 | 22676339.00 | ND |
| 2020-07-15 | 22676145.00 | ND |
| 2020-07-16 | 22869586.00 | ND |
| 2020-07-16 | 22676393.00 | ND |
| 2020-07-16 | 22676366.00 | ND |
| 2023-04-27 | 28974671.00 | ND |
| 2023-04-27 | 28974651.00 | ND |
| 2023-05-03 | 28974811.00 | ND |
| 2023-05-03 | 28974778.00 | ND |
| 2023-05-04 | 28974716.00 | ND |
| 2023-08-02 | 29571007.00 | ND |
| 2023-08-02 | 29571028.00 | ND |
| 2023-08-03 | 29571067.00 | ND |
| 2023-08-03 | 29571088.00 | ND |
| 2023-08-22 | 29571217.00 | ND |