Know Your Environment. Protect Your Health.

Diquat

Calif State Polytechnical Univ - Pomona

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
2018ND10ND
2019N/A00N/A
2020ND20ND
2021N/A00N/A
2022ND10ND
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
2018-12-04CA1910022_005_005-201812041250ND
2020-06-09CA1910022_005_005-202006091010ND
2020-12-08CA1910022_005_005-202012081210ND
2022-06-07CA1910022_005_005-202206071035ND
2023-03-07CA1910022_005_005-202303071225ND
2023-06-20CA1910022_005_005-202306201100ND
2023-09-26CA1910022_005_005-202309261135ND