Diquat
Los Angeles CWWD 40, R24, 27,33-Pearblsm
Diquat is a herbicide used on potato crops and aquatic weeds.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | N/A | 0 | 0 | N/A |
2015 | ND | 6 | 0 | ND |
2016 | N/A | 0 | 0 | N/A |
2017 | N/A | 0 | 0 | N/A |
2018 | ND | 8 | 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 |
---|---|---|
2015-06-18 | 5442-005-1114 | ND |
2015-06-18 | 5442-019-1150 | ND |
2015-06-18 | 5442-020-1020 | ND |
2015-08-19 | 5442-005-0927 | ND |
2015-08-19 | 5442-019-0905 | ND |
2015-08-19 | 5442-020-0954 | ND |
2018-08-27 | 9590-002-1003 | ND |
2018-08-27 | 9590-014-1047 | ND |
2018-08-28 | 9590-005-1022 | ND |
2018-08-28 | 9590-020-1111 | ND |
2018-10-09 | 9590-005-0931 | ND |
2018-10-09 | 9590-020-1023 | ND |
2018-10-10 | 9590-002-1053 | ND |
2018-10-10 | 9590-014-1013 | ND |