Endothall
Aqua Pa Uwchlan
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 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 23 | 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 |
|---|---|---|
| 2022-08-03 | 27223924.00 | ND |
| 2022-10-12 | 27632673.00 | ND |
| 2023-02-07 | 28340596.00 | ND |
| 2023-02-07 | 28340536.00 | ND |
| 2023-02-07 | 28340566.00 | ND |
| 2023-02-07 | 28340656.00 | ND |
| 2023-02-07 | 28340626.00 | ND |
| 2023-02-14 | 28340893.00 | ND |
| 2023-04-17 | 28692518.00 | ND |
| 2023-04-20 | 28692457.00 | ND |
| 2023-04-20 | 28692487.00 | ND |
| 2023-04-20 | 28692427.00 | ND |
| 2023-04-26 | 28692553.00 | ND |
| 2023-04-26 | 28692583.00 | ND |
| 2023-07-11 | 29292747.00 | ND |
| 2023-07-11 | 29292746.00 | ND |
| 2023-07-17 | 29292749.00 | ND |
| 2023-07-17 | 29292748.00 | ND |
| 2023-07-17 | 29292750.00 | ND |
| 2023-07-17 | 29292751.00 | ND |
| 2023-10-16 | 29877671.00 | ND |
| 2023-10-18 | 29877673.00 | ND |
| 2023-10-18 | 29877672.00 | ND |
| 2023-10-31 | 30062514.00 | ND |
| 2023-10-31 | 30062515.00 | ND |