Diquat
Tulsa
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 | N/A | 0 | 0 | N/A |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | N/A | 0 | 0 | N/A |
2018 | ND | 8 | 0 | ND |
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 |
---|---|---|
2018-02-13 | AB13007-01 | ND |
2018-02-13 | AB13007-02 | ND |
2018-04-17 | AD17018-01 | ND |
2018-04-17 | AD17018-02 | ND |
2018-07-24 | AG24096-01 | ND |
2018-07-24 | AG24096-02 | ND |
2018-10-09 | AJ09053-01 | ND |
2018-10-09 | AJ09053-02 | ND |
2019-02-19 | BB19011-01 | ND |
2019-02-19 | BB19011-02 | ND |