Diquat
Carlinville
Diquat is a herbicide used on potato crops and aquatic weeds.
9
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 | 1 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 1 | 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 |
|---|---|---|
| 2014-04-23 | 4043942-01 | ND |
| 2015-05-07 | 5051284-01 | ND |
| 2016-04-26 | 6044210-01 | ND |
| 2016-07-14 | 6072794-01 | ND |
| 2016-11-16 | 6113067-01 | ND |
| 2017-01-09 | 7011225-01 | ND |
| 2017-04-18 | 7042874-01 | ND |
| 2018-05-01 | 8050500-01 | ND |
| 2019-04-15 | 9043507-01 | ND |