Endothall
Quint-mar 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 | ND | 10 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | ND | 10 | 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 |
|---|---|---|
| 2019-02-05 | AB32809 | ND |
| 2019-02-05 | AB32810 | ND |
| 2019-02-05 | AB32811 | ND |
| 2019-02-05 | AB32808 | ND |
| 2019-04-17 | AB34287 | ND |
| 2019-07-17 | AB36908-1 | ND |
| 2019-07-17 | AB36909 | ND |
| 2019-07-17 | AB36910 | ND |
| 2019-07-17 | AB36911 | ND |
| 2019-07-17 | AB36912 | ND |
| 2020-07-20 | AB43481 | ND |
| 2020-11-05 | AB46358 | ND |
| 2022-02-08 | AB56151 | ND |
| 2022-02-08 | AB56155 | ND |
| 2022-02-08 | AB56154 | ND |
| 2022-02-08 | AB56153 | ND |
| 2022-02-08 | AB56152 | ND |
| 2022-07-20 | AB60396 | ND |
| 2022-07-20 | AB60397 | ND |
| 2022-07-20 | AB60398 | ND |
| 2022-07-20 | AB60399 | ND |
| 2022-07-20 | AB60400 | ND |
| 2023-02-06 | AB65254 | ND |
| 2023-07-17 | AB69865 | ND |