Endothall
Lafayette Utilities 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 | 18 | 0 | ND |
| 2019 | ND | 14 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 10 | 0 | ND |
| 2022 | ND | 8 | 0 | ND |
| 2023 | ND | 4 | 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 |
|---|---|---|
| 2018-03-05 | 35378308005 | ND |
| 2018-03-05 | 35378308001 | ND |
| 2018-03-05 | 35378308005 | ND |
| 2018-03-05 | 35378308004 | ND |
| 2018-03-05 | 35378308003 | ND |
| 2018-03-05 | 35378308002 | ND |
| 2018-03-05 | 35378308001 | ND |
| 2018-03-05 | 35378308002 | ND |
| 2018-03-05 | 35378308003 | ND |
| 2018-03-05 | 35378308004 | ND |
| 2018-05-14 | 35392629001 | ND |
| 2018-05-14 | 35392629001 | ND |
| 2018-06-19 | 35399735001 | ND |
| 2018-06-19 | 35399735002 | ND |
| 2018-06-19 | 35399735003 | ND |
| 2018-06-19 | 35399735003 | ND |
| 2018-06-19 | 35399735002 | ND |
| 2018-06-19 | 35399735001 | ND |
| 2019-01-14 | 35442609002 | ND |
| 2019-01-14 | 35442609001 | ND |
| 2019-01-14 | 35442609001 | ND |
| 2019-01-14 | 35442609002 | ND |
| 2019-08-12 | 35490056002 | ND |
| 2019-08-12 | 35490056001 | ND |
| 2019-08-12 | 35490056005 | ND |
| 2019-08-12 | 35490056003 | ND |
| 2019-08-12 | 35490056004 | ND |
| 2019-08-12 | 35490056005 | ND |
| 2019-08-12 | 35490056001 | ND |
| 2019-08-12 | 35490056002 | ND |
| 2019-08-12 | 35490056003 | ND |
| 2019-08-12 | 35490056004 | ND |
| 2020-07-20 | 35564847001 | ND |
| 2020-07-20 | 35564847002 | ND |
| 2020-07-20 | 35564847003 | ND |
| 2021-02-08 | 35610872001 | ND |
| 2021-02-08 | 35610872005 | ND |
| 2021-02-08 | 35610872004 | ND |
| 2021-02-08 | 35610872003 | ND |
| 2021-02-08 | 35610872002 | ND |
| 2021-06-21 | 35642603004 | ND |
| 2021-06-21 | 35642603003 | ND |
| 2021-06-21 | 35642603002 | ND |
| 2021-06-21 | 35642603001 | ND |
| 2021-06-21 | 35642603005 | ND |
| 2022-05-23 | 35720206002 | ND |
| 2022-05-23 | 35720206006 | ND |
| 2022-05-23 | 35720206005 | ND |
| 2022-05-23 | 35720206004 | ND |
| 2022-05-23 | 35720206003 | ND |
| 2022-05-23 | 35720206001 | ND |
| 2022-07-26 | 35735281007 | ND |
| 2022-07-26 | 35735281005 | ND |
| 2023-05-22 | 35801891002 | ND |
| 2023-05-22 | 35801891004 | ND |
| 2023-05-22 | 35801891005 | ND |
| 2023-05-22 | 35801891006 | ND |