Know Your Environment. Protect Your Health.

Diquat

Woodward Resource Center

NOTE: Woodward Resource Center purchases water from Xenia Rural Water District (woodward) which is required to test for diquat. Sample information shown below was taken by Xenia Rural Water District (woodward).

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

 

1

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020N/A00N/A
2021N/A00N/A
2022N/A00N/A
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

NOTE: Woodward Resource Center purchases water from Xenia Rural Water District (woodward) which is required to test for diquat. Sample information shown below was taken by Xenia Rural Water District (woodward).

Date Lab ID Result
2019-07-241G92110-01ND