Endothall
State College Boro Water Auth.
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 | 10 | 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 |
|---|---|---|
| 2020-05-13 | 22292186.00 | ND |
| 2020-05-13 | 22292159.00 | ND |
| 2020-05-13 | 22292267.00 | ND |
| 2020-05-13 | 22292213.00 | ND |
| 2020-05-13 | 22292240.00 | ND |
| 2020-08-17 | 23069129.00 | ND |
| 2020-08-17 | 22876894.00 | ND |
| 2020-08-17 | 22876871.00 | ND |
| 2020-08-17 | 22876914.00 | ND |
| 2020-08-31 | 23069152.00 | ND |
| 2023-05-15 | 28981622.00 | ND |
| 2023-05-15 | 28981613.00 | ND |
| 2023-05-15 | 28981636.00 | ND |
| 2023-05-15 | 28981650.00 | ND |
| 2023-05-15 | 28981604.00 | ND |
| 2023-08-14 | 29577849.00 | ND |
| 2023-08-16 | 29578215.00 | ND |
| 2023-08-16 | 29578157.00 | ND |
| 2023-08-16 | 29578244.00 | ND |
| 2023-08-16 | 29578186.00 | ND |