Diquat
IL American - Peoria
Diquat is a herbicide used on potato crops and aquatic weeds.
18
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 1 | 0 | ND |
| 2015 | ND | 7 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 7 | 0 | ND |
| 2019 | ND | 1 | 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 |
|---|---|---|
| 2014-04-02 | 25168001 | ND |
| 2015-04-01 | 28599201 | ND |
| 2015-04-06 | 28599501 | ND |
| 2015-04-06 | 28599801 | ND |
| 2015-04-06 | 28600201 | ND |
| 2015-07-07 | 29623301 | ND |
| 2015-07-07 | 29623701 | ND |
| 2015-07-07 | 29624001 | ND |
| 2016-04-14 | 31717601 | ND |
| 2017-04-06 | 35213801 | ND |
| 2018-04-09 | 39116001 | ND |
| 2018-04-09 | 39116401 | ND |
| 2018-04-09 | 39116901 | ND |
| 2018-04-10 | 39115701 | ND |
| 2018-07-11 | 40365001 | ND |
| 2018-07-11 | 40365501 | ND |
| 2018-07-11 | 40365801 | ND |
| 2019-04-01 | 43820401 | ND |