Diquat
Baraboo 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 | 5 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 7 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2014-04-08 | 4040374-01(77793 | ND |
2014-04-08 | 4040374-02(77930 | ND |
2014-08-12 | 4080426-03(81053 | ND |
2014-08-12 | 4080426-02 | ND |
2014-08-12 | 4080426-02(81053 | ND |
2017-06-05 | 995327 | ND |
2017-06-05 | 995326 | ND |
2017-08-22 | 1013083 | ND |
2017-08-22 | 1013091 | ND |
2017-08-22 | 1013094 | ND |
2017-08-22 | 1013079 | ND |
2017-08-22 | 1013087 | ND |