Know Your Environment. Protect Your Health.

Diquat

Prairie Ronde Water System Inc.

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

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND100ND
2019N/A00N/A
2020N/A00N/A
2021ND50ND
2022N/A00N/A
2023N/A00N/A

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
2018-05-0735391146001ND
2018-05-0735391146001ND
2018-09-2435420585001ND
2018-09-2435420585002ND
2018-09-2435420585003ND
2018-09-2435420585004ND
2018-09-2435420585001ND
2018-09-2435420585002ND
2018-09-2435420585003ND
2018-09-2435420585004ND
2021-05-1735634489001ND
2021-05-1735634489002ND
2021-05-1735634489003ND
2021-05-1735634489004ND
2021-05-1735634489005ND