Diquat
Aquarion Water Company of Connecticut - Valley System
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 | 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 |
---|---|---|
2016-02-03 | 201601674-SOC | ND |
2016-02-03 | 201601672-SOC | ND |
2016-02-03 | 201601668-SOC | ND |
2016-05-03 | 201605607-SOC | ND |
2016-05-03 | 201605605-SOC | ND |
2016-05-03 | 201605601-SOC | ND |
2019-02-05 | 201901652-SOC | ND |
2019-02-05 | 201901650-SOC | ND |
2019-09-17 | 201914877-SOC | ND |
2019-09-17 | 201914876-SOC | ND |
2019-09-17 | 201914878-SOC | ND |
2019-10-15 | 201916856-SOC | ND |