Diquat
Kenilworth
NOTE: Kenilworth purchases water from Wilmette which is required to test for diquat. Sample information shown below was taken by Wilmette.
Diquat is a herbicide used on potato crops and aquatic weeds.
Samples
Samples exceeding legal limit (MCL)
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 | 1 | 0 | ND |
| 2017 | ND | 1 | 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
NOTE: Kenilworth purchases water from Wilmette which is required to test for diquat. Sample information shown below was taken by Wilmette.
| Date | Lab ID | Result |
|---|---|---|
| 2014-04-21 | 4043723-01 | ND |
| 2015-04-20 | 5043660-01 | ND |
| 2016-04-18 | 6043501-02 | ND |
| 2017-04-17 | 7042646-01 | ND |
| 2018-04-16 | 8042855-01 | ND |
| 2019-04-15 | 9043395-01 | ND |