Know Your Environment. Protect Your Health.

Diquat

Dixie Overland Water System

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

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND80ND
2019N/A00N/A
2020N/A00N/A
2021ND40ND
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
2018-04-1635386971001ND
2018-04-1635386971002ND
2018-04-1635386971003ND
2018-04-1635386971004ND
2018-04-1635386971001ND
2018-04-1635386971002ND
2018-04-1635386971003ND
2018-04-1635386971004ND
2021-05-2035635248001ND
2021-05-2035635248002ND
2021-05-2035635248003ND
2021-05-2035635248004ND