Know Your Environment. Protect Your Health.

Diquat

Hazardville Water Company

Diquat is a herbicide used on potato crops and aquatic weeds.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020ND120ND
2021N/A00N/A
2022N/A00N/A
2023ND20ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2020-05-19CF98410ND
2020-05-19CF98413ND
2020-05-19CF98414ND
2020-05-20CF98411ND
2020-05-20CF98408ND
2020-05-20CF98409ND
2020-12-15CH32273ND
2020-12-15CH32270ND
2020-12-15CH32272ND
2020-12-15CH32275ND
2020-12-15CH32271ND
2020-12-15CH32276ND
2023-02-28CN51115ND
2023-09-12CO95278ND