Endothall
Ardmore 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 | N/A | 0 | 0 | N/A |
| 2019 | ND | 6 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | ND | 7 | 0 | ND |
| 2023 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2019-01-24 | 19010621-001G | ND |
| 2019-01-24 | 19010621-002G | ND |
| 2019-07-30 | 20114806001_ISOC | ND |
| 2019-07-30 | 20114806002_ISOC | ND |
| 2019-09-10 | 20120791001_ISOC | ND |
| 2019-10-29 | 20128009001_ISOC | ND |
| 2022-02-28 | 35699992001_ISOC | ND |
| 2022-02-28 | 35699992002_ISOC | ND |
| 2022-05-23 | 35719548001_ISOC | ND |
| 2022-05-23 | 35719549001_ISOC | ND |
| 2022-05-23 | 35719550001_ISOC | ND |
| 2022-11-28 | 35762267001A_ISOC | ND |
| 2022-11-28 | 35762267001_ISOC | ND |