Know Your Environment. Protect Your Health.

Diquat

Paw Blue Mountain Division

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

 

21

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
2019ND10ND
2020ND100ND
2021N/A00N/A
2022N/A00N/A
2023ND100ND

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
2019-07-1645238801ND
2020-04-2222086532.00ND
2020-04-2922278276.00ND
2020-04-2922278347.00ND
2020-05-1122278405.00ND
2020-05-1122278376.00ND
2020-07-2022668158.00ND
2020-07-2022668129.00ND
2020-08-1722861739.00ND
2020-08-1722861681.00ND
2020-08-1722861710.00ND
2023-04-1028766828.00ND
2023-04-1028766820.00ND
2023-04-1128766770.00ND
2023-04-1128766679.00ND
2023-06-0729172399.00ND
2023-07-1229363499.00ND
2023-07-1229363440.00ND
2023-07-2429363577.00ND
2023-07-2429363527.00ND
2023-07-2429363496.00ND