Diquat
Aqua Pa Superior Main System
Diquat is a herbicide used on potato crops and aquatic weeds.
10
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | N/A | 0 | 0 | N/A |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 2 | 0 | ND |
2017 | ND | 5 | 0 | ND |
2018 | ND | 3 | 0 | ND |
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 |
---|---|---|
2016-09-29 | 14913263 | ND |
2016-12-02 | 15376945 | ND |
2017-03-22 | 15800719 | ND |
2017-03-22 | 15800755 | ND |
2017-03-22 | 15800791 | ND |
2017-03-22 | 15800827 | ND |
2017-03-22 | 15800863 | ND |
2018-04-13 | 2309267001 | ND |
2018-06-22 | 2322580001 | ND |
2018-08-09 | 2331923001 | ND |