Diquat
Franklin Water Utility
NOTE: Franklin Water Utility purchases water from Oak Creek Waterworks which is required to test for diquat. Sample information shown below was taken by Oak Creek Waterworks.
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | ND | 1 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 2 | 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
NOTE: Franklin Water Utility purchases water from Oak Creek Waterworks which is required to test for diquat. Sample information shown below was taken by Oak Creek Waterworks.
Date | Lab ID | Result |
---|---|---|
2014-04-08 | 778651 | ND |
2014-07-09 | 801946 | ND |
2017-04-11 | 982476 | ND |
2017-09-07 | 1016619 | ND |