Know Your Environment. Protect Your Health.

Diquat

Cal Am Water Company - Ambler Park

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

 

7

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
2019ND10ND
2020ND30ND
2021N/A00N/A
2022N/A00N/A
2023ND30ND

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
2019-09-23CA2710006_004_004-201909231724ND
2020-04-08CA2710006_004_004-202004081440ND
2020-04-13CA2710006_006_006-202004131345ND
2020-04-14CA2710006_009_009-202004141100ND
2023-04-14CA2710006_009_009-202304141140ND
2023-04-20CA2710006_006_006-202304201316ND
2023-04-20CA2710006_004_004-202304201335ND