Know Your Environment. Protect Your Health.

Diquat

Santa Claus Water Utility

NOTE: Santa Claus Water Utility purchases water from Patoka Lake Regional Water which is required to test for diquat. Sample information shown below was taken by Patoka Lake Regional Water.

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

 

9

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
2022ND30ND
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: Santa Claus Water Utility purchases water from Patoka Lake Regional Water which is required to test for diquat. Sample information shown below was taken by Patoka Lake Regional Water.

Date Lab ID Result
2018-05-16416929RS28-1802ND
2018-08-16426574RS28-1803ND
2021-08-184990898ND
2021-11-101-810-7353-1ND
2022-05-101-810-24180-1ND
2022-08-161-810-34359-1_INND
2022-11-081-810-43880-1_INND
2023-05-091-810-62557-1_INND
2023-08-091-810-73252-1_INND