Diquat
Manchester Water Department
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 | 7 | 0 | ND |
2015 | ND | 7 | 0 | ND |
2016 | N/A | 0 | 0 | N/A |
2017 | N/A | 0 | 0 | N/A |
2018 | ND | 7 | 0 | ND |
2019 | ND | 10 | 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 |
---|---|---|
2014-05-05 | AA65112-SOC5 | ND |
2014-05-05 | AA65113-SOC5 | ND |
2014-05-05 | AA65105-SOC5 | ND |
2014-05-06 | AA65126-SOC5 | ND |
2014-05-06 | AA65127-SOC5 | ND |
2014-05-07 | AA65143-SOC5 | ND |
2014-05-07 | AA65144-SOC5 | ND |
2015-04-27 | AA69419-SOC5 | ND |
2015-04-27 | AA69420-SOC5 | ND |
2015-04-28 | AA69437-SOC5 | ND |
2015-04-28 | AA69438-SOC5 | ND |
2015-04-29 | AA69445-SOC5 | ND |
2015-04-29 | AA69452-SOC5 | ND |
2015-04-29 | AA69453-SOC5 | ND |
2018-06-13 | AA84270-SOC5 | ND |
2018-06-13 | AA84269-SOC5 | ND |
2018-06-26 | AA84433-SOC5 | ND |
2018-06-27 | AA84458-SOC5 | ND |
2018-06-27 | AA84459-SOC5 | ND |
2018-06-29 | AA84479-SOC5 | ND |
2018-06-29 | AA84480-SOC5 | ND |
2019-09-16 | AA90007-SOC2 | ND |
2019-09-16 | AA89985-SOC2 | ND |
2019-09-16 | AA89986-SOC2 | ND |
2019-09-16 | AA89986-SOC2 | ND |
2019-09-16 | AA90001-SOC2 | ND |
2019-09-16 | AA90001-SOC2 | ND |
2019-09-16 | AA89989-SOC2 | ND |
2019-09-17 | AA90002-SOC2 | ND |
2019-09-17 | AA89998-SOC2 | ND |
2019-09-17 | AA89998-SOC2 | ND |