Know Your Environment. Protect Your Health.

Diquat

Brodhead Creek Reg Water Authority

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
2020ND40ND
2021ND10ND
2022ND30ND
2023ND60ND

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
2020-04-1322045754.00ND
2020-04-1522045669.00ND
2020-08-1722821832.00ND
2020-08-1722821866.00ND
2021-10-2025427405.00ND
2022-02-2326137323.00ND
2022-05-2326671969.00ND
2022-08-2227258422.00ND
2023-05-0528924577.00ND
2023-05-0528924617.00ND
2023-05-0528924657.00ND
2023-08-1429521937.00ND
2023-08-1429521970.00ND
2023-08-1629522007.00ND