Endothall
Newellton Water System
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 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 2 | 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 |
|---|---|---|
| 2018-04-16 | 35386967001 | ND |
| 2018-04-16 | 35386967001 | ND |
| 2018-07-30 | 35407879001 | ND |
| 2018-07-30 | 35407879001 | ND |
| 2019-01-14 | 35442603002 | ND |
| 2019-01-14 | 35442603002 | ND |
| 2019-07-31 | 35486738001 | ND |
| 2019-07-31 | 35486738001 | ND |
| 2020-01-06 | 35523110001 | ND |
| 2020-09-09 | 35577109001 | ND |
| 2021-01-18 | 35605842002 | ND |
| 2021-09-15 | 35664395001 | ND |
| 2022-01-18 | 35692112002 | ND |
| 2022-08-15 | 35741176002 | ND |
| 2023-02-06 | 35778177003 | ND |
| 2023-07-18 | 35814094001 | ND |