Endothall
Tesoro Viejo Master Mwc, Inc.
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 | 3 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 6 | 0 | ND |
| 2021 | ND | 5 | 0 | ND |
| 2022 | ND | 5 | 0 | ND |
| 2023 | ND | 5 | 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 |
|---|---|---|
| 2018-08-31 | CA2010017_002_002-201808310845 | ND |
| 2018-12-06 | CA2010017_006_006-201812061055 | ND |
| 2018-12-12 | CA2010017_001_001-201812121110 | ND |
| 2019-03-20 | CA2010017_001_001-201903200815 | ND |
| 2019-06-12 | CA2010017_006_006-201906121015 | ND |
| 2019-08-21 | CA2010017_002_002-201908210955 | ND |
| 2019-11-13 | CA2010017_006_006-201911131010 | ND |
| 2020-02-05 | CA2010017_006_006-202002051000 | ND |
| 2020-05-13 | CA2010017_006_006-202005131000 | ND |
| 2020-06-03 | CA2010017_002_002-202006031215 | ND |
| 2020-06-09 | CA2010017_001_001-202006090845 | ND |
| 2020-09-02 | CA2010017_001_001-202009020840 | ND |
| 2020-12-09 | CA2010017_001_001-202012090945 | ND |
| 2021-03-16 | CA2010017_001_001-202103161000 | ND |
| 2021-06-09 | CA2010017_001_001-202106090845 | ND |
| 2021-06-28 | CA2010017_002_002-202106280955 | ND |
| 2021-09-15 | CA2010017_001_001-202109151045 | ND |
| 2021-12-15 | CA2010017_001_001-202112151110 | ND |
| 2022-03-10 | CA2010017_001_001-202203100845 | ND |
| 2022-06-08 | CA2010017_001_001-202206080930 | ND |
| 2022-07-06 | CA2010017_002_002-202207060900 | ND |
| 2022-09-13 | CA2010017_001_001-202209131030 | ND |
| 2022-12-05 | CA2010017_001_001-202212051045 | ND |
| 2023-02-14 | CA2010017_006_006-202302141040 | ND |
| 2023-03-13 | CA2010017_001_001-202303131230 | ND |
| 2023-06-05 | CA2010017_001_001-202306051040 | ND |
| 2023-09-12 | CA2010017_001_001-202309120840 | ND |
| 2023-12-05 | CA2010017_001_001-202312050845 | ND |