Know Your Environment. Protect Your Health.

Diquat

Pajaro Community Services District

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

 

8

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019N/A00N/A
2020N/A00N/A
2021ND20ND
2022N/A00N/A
2023ND40ND

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
2018-08-13CA2710020_002_002-201808131300ND
2018-12-10CA2710020_002_002-201812101100ND
2021-06-07CA2710020_002_002-202106070750ND
2021-08-09CA2710020_002_002-202108090900ND
2023-03-27CA2710020_002_002-202303270820ND
2023-03-29CA2710020_DST_802-202303291003ND
2023-05-08CA2710020_002_002-202305081203ND
2023-08-07CA2710020_002_002-202308070805ND