Diquat
Indiana American Water - Johnson County
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 |
---|---|---|---|---|
2014 | N/A | 0 | 0 | N/A |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 6 | 0 | ND |
2017 | N/A | 0 | 0 | N/A |
2018 | N/A | 0 | 0 | N/A |
2019 | ND | 6 | 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 |
---|---|---|
2016-04-13 | 317340RS28-1602 | ND |
2016-04-13 | 317342RS28-1602 | ND |
2016-04-13 | 317344RS28-1602 | ND |
2016-07-12 | 326366RS28-1603 | ND |
2016-07-12 | 326367RS28-1603 | ND |
2016-07-12 | 326368RS28-1603 | ND |
2019-04-03 | 43623901RS28-190 | ND |
2019-04-03 | 43624001RS28-190 | ND |
2019-04-03 | 43624101RS28-190 | ND |
2019-07-11 | 452431RS28-1903 | ND |
2019-07-11 | 452432RS28-1903 | ND |
2019-07-11 | 452433RS28-1903 | ND |