Diquat
Lakeside WD
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 | 3 | 0 | ND |
2015 | ND | 3 | 0 | ND |
2016 | ND | 3 | 0 | ND |
2017 | ND | 3 | 0 | ND |
2018 | ND | 3 | 0 | ND |
2019 | ND | 3 | 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 |
---|---|---|
2014-12-15 | 9588-016-1300 | ND |
2014-12-15 | 9588-009-1300 | ND |
2014-12-15 | 9588-002-1300 | ND |
2015-12-14 | 9588-002-0800 | ND |
2015-12-14 | 9588-009-0900 | ND |
2015-12-14 | 9588-016-0830 | ND |
2016-12-19 | 5867-002-1100 | ND |
2016-12-19 | 5867-016-1100 | ND |
2016-12-19 | 5867-009-1100 | ND |
2017-12-18 | 9588-009-1130 | ND |
2017-12-18 | 9588-016-1200 | ND |
2017-12-18 | 9588-002-1100 | ND |
2018-11-26 | 9588-009-1430 | ND |
2018-11-26 | 9588-016-1430 | ND |
2018-11-26 | 9588-002-1430 | ND |
2019-12-17 | 9588-009-0915 | ND |
2019-12-17 | 9588-016-1041 | ND |
2019-12-18 | 9588-002-0826 | ND |