Know Your Environment. Protect Your Health.

Diquat

Whitehall Twp Authority

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

 

20

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
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
2020-05-1922274546.00ND
2020-05-1922274426.00ND
2020-05-1922274516.00ND
2020-05-1922274486.00ND
2020-05-1922274456.00ND
2020-08-0422857088.00ND
2020-08-0422857118.00ND
2020-08-0422857058.00ND
2020-08-0422857028.00ND
2020-08-0422856998.00ND
2023-05-0228962462.00ND
2023-05-0228962463.00ND
2023-05-0228962461.00ND
2023-05-0228962459.00ND
2023-05-0228962460.00ND
2023-08-0129558726.00ND
2023-08-0129558724.00ND
2023-08-0129558727.00ND
2023-08-0129558725.00ND
2023-08-0129558728.00ND