Know Your Environment. Protect Your Health.

Diquat

Belle Chasse Water District

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
2018ND40ND
2019ND40ND
2020ND20ND
2021ND20ND
2022ND20ND
2023ND20ND

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
2018-01-3035371297002ND
2018-01-3035371297002ND
2018-10-0235421769001ND
2018-10-0235421769001ND
2019-02-0535446735001ND
2019-02-0535446735001ND
2019-08-1435490418001ND
2019-08-1435490418001ND
2020-03-1835538514001ND
2020-10-2635587644001ND
2021-03-0135615730001ND
2021-12-0835683691001ND
2022-01-1335690757001ND
2022-08-0435737247001ND
2023-02-0135777178001ND
2023-10-3135838751001ND