Know Your Environment. Protect Your Health.

Diquat

Tipton

NOTE: Tipton purchases water from Frederick which is required to test for diquat. Sample information shown below was taken by Frederick.

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

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND30ND
2020ND20ND
2021ND40ND
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

NOTE: Tipton purchases water from Frederick which is required to test for diquat. Sample information shown below was taken by Frederick.

Date Lab ID Result
2018-07-24AG25016-01ND
2018-10-09AJ10025-01ND
2019-01-17BA18010-01ND
2019-04-10BD11004-01ND
2019-08-13BH14007-01ND
2020-05-19CE20009-01ND
2020-07-28CG29004-01ND
2021-06-08DF09018-01ND
2021-09-13DI14006-01ND
2022-06-13EF14012-01ND
2022-11-15EK15105-01ND
2023-03-21FC21108-01ND
2023-06-26FF26014-01ND