Endothall
Lehigh County Authority Allentown Division
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 | 8 | 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 |
|---|---|---|
| 2020-04-08 | 22077902.00 | ND |
| 2020-04-14 | 22077858.00 | ND |
| 2020-04-22 | 22078436.00 | ND |
| 2020-05-12 | 22270483.00 | ND |
| 2020-07-08 | 22660542.00 | ND |
| 2020-07-16 | 22660582.00 | ND |
| 2020-07-22 | 22660656.00 | ND |
| 2020-07-22 | 22660618.00 | ND |
| 2023-04-11 | 28759080.00 | ND |
| 2023-04-11 | 28759081.00 | ND |
| 2023-04-19 | 28759256.00 | ND |
| 2023-04-26 | 28958430.00 | ND |
| 2023-04-26 | 28958429.00 | ND |
| 2023-07-11 | 29355946.00 | ND |
| 2023-07-11 | 29355945.00 | ND |
| 2023-07-18 | 29355883.00 | ND |
| 2023-07-18 | 29355884.00 | ND |
| 2023-07-25 | 29554453.00 | ND |