Know Your Environment. Protect Your Health.

Diquat

Elba Water Works

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

 

16

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
2019ND80ND
2020N/A00N/A
2021N/A00N/A
2022ND80ND
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
2019-03-2719030661-001HND
2019-03-2719030661-002HND
2019-03-2719030661-003HND
2019-07-3020114953001_ISOCND
2019-07-3020114953002_ISOCND
2019-07-3020114953003_ISOCND
2019-07-3020114953004_ISOCND
2019-11-0520128988001_ISOCND
2022-03-2935706623001_ISOCND
2022-03-2935706623002_ISOCND
2022-09-2235748612001_ISOCND
2022-09-2235748612002_ISOCND
2022-11-1735760584001_ISOCND
2022-11-1735760584002_ISOCND
2022-11-1735760584003_ISOCND
2022-11-1735760584004_ISOCND