Diquat
Az State Prison - Geo Group - Kingman
Diquat is a herbicide used on potato crops and aquatic weeds.
7
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 | ND | 4 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 1 | 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 |
|---|---|---|
| 2014-02-19 | 550-19953-1S | ND |
| 2014-05-30 | 550-25392-1S | ND |
| 2014-08-25 | 550-30542-1 | ND |
| 2014-12-22 | 550-37390-1 | ND |
| 2015-02-10 | 550-39976-1 | ND |
| 2015-08-25 | 550-50152-1 | ND |
| 2017-09-30 | 550-90849-1SOC | ND |