Diquat
Lake In The Hills
Diquat is a herbicide used on potato crops and aquatic weeds.
28
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | ND | 14 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 14 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 6 ppb
The EWG Health Guideline of 6 ppb for diquat 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 cataracts.
EPA Maximum Contaminant
Level (MCL) 20 ppb
The legal limit for diquat, established in 1992, was based on a toxicity study in laboratory animals conducted in the 1980s.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2015-02-19 | 5022854-01 | ND |
| 2015-02-19 | 5022854-02 | ND |
| 2015-02-19 | 5022855-03 | ND |
| 2015-02-19 | 5022851-02 | ND |
| 2015-02-19 | 5022854-03 | ND |
| 2015-02-19 | 5022855-02 | ND |
| 2015-02-19 | 5022851-01 | ND |
| 2015-04-28 | 5044427-01 | ND |
| 2015-04-28 | 5044431-02 | ND |
| 2015-04-28 | 5044431-01 | ND |
| 2015-04-28 | 5044440-03 | ND |
| 2015-04-28 | 5044440-01 | ND |
| 2015-04-28 | 5044440-04 | ND |
| 2015-04-28 | 5044427-02 | ND |
| 2018-01-09 | 3850153 | ND |
| 2018-01-09 | 3850143 | ND |
| 2018-01-09 | 3850135 | ND |
| 2018-01-09 | 3849999 | ND |
| 2018-01-10 | 3851317 | ND |
| 2018-01-10 | 3851333 | ND |
| 2018-01-10 | 3851646 | ND |
| 2018-04-10 | 8041928-05 | ND |
| 2018-04-10 | 8041928-06 | ND |
| 2018-04-10 | 8041928-07 | ND |
| 2018-04-10 | 8041928-04 | ND |
| 2018-04-10 | 8041928-03 | ND |
| 2018-04-10 | 8041928-02 | ND |
| 2018-04-10 | 8041928-01 | ND |