Diquat
Dona Ana MDWCA
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 | ND | 6 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 5 | 0 | ND |
2018 | ND | 4 | 0 | ND |
2019 | ND | 2 | 0 | ND |
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 |
---|---|---|
2014-07-29 | 1408060-005A | ND |
2014-07-29 | 1408063-005A | ND |
2014-07-29 | 1408057-005A | ND |
2014-07-29 | 1408062-005A | ND |
2014-07-29 | 1408061-005A | ND |
2014-09-03 | 1409282-005A | ND |
2017-03-07 | 1703473-001 | ND |
2017-03-07 | 1703474-001 | ND |
2017-03-07 | 1703472-001 | ND |
2017-03-07 | 1703471-001 | ND |
2017-10-03 | 1710331-001 | ND |
2018-01-09 | 1801603-005 | ND |
2018-01-09 | 1801604-005 | ND |
2018-01-09 | 1801605-002 | ND |
2018-01-16 | 1801921-005 | ND |
2019-07-09 | 1907439-005 | ND |
2019-10-21 | 1910C28-002 | ND |