Diquat
Arizona Water Company - Lakeside
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 | N/A | 0 | 0 | N/A |
2015 | ND | 10 | 0 | ND |
2016 | N/A | 0 | 0 | N/A |
2017 | N/A | 0 | 0 | N/A |
2018 | ND | 10 | 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 |
---|---|---|
2015-05-19 | 5051551-04S | ND |
2015-05-19 | 5051551-03S | ND |
2015-05-19 | 5051551-02 | ND |
2015-05-19 | 5051551-01S | ND |
2015-06-22 | 5061965-01S | ND |
2015-10-20 | 5102168-01 | ND |
2015-10-20 | 5102168-05 | ND |
2015-10-20 | 5102168-04 | ND |
2015-10-20 | 5102168-03 | ND |
2015-10-20 | 5102168-02 | ND |
2018-05-21 | 18E2210-05 SOC | ND |
2018-05-21 | 18E2210-04 SOC | ND |
2018-05-21 | 18E2210-03 SOC | ND |
2018-05-21 | 18E2210-02 SOC | ND |
2018-05-21 | 18E2210-01 SOC | ND |
2018-10-15 | 18J1763-01 | ND |
2018-10-15 | 18J1763-05 | ND |
2018-10-15 | 18J1763-04 | ND |
2018-10-15 | 18J1763-03 | ND |
2018-10-15 | 18J1763-02 | ND |