Diquat
Forrest City Waterworks
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | ND | 2 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 4 | 0 | ND |
2017 | ND | 2 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2014-04-23 | 14114013808 | ND |
2014-08-27 | 14240000608 | ND |
2016-07-06 | 16189013608 | ND |
2016-07-06 | 16189013508 | ND |
2016-10-03 | 16279003207 | ND |
2016-10-03 | 16279003107 | ND |
2017-04-03 | 17096000208 | ND |
2017-07-31 | 17215001706 | ND |
2019-07-23 | 19206006708 | ND |
2019-07-23 | 19206006809 | ND |