Know Your Environment. Protect Your Health.

Diquat

Warminster Municipal Authority

NOTE: Warminster Municipal Authority purchases water from North Wales Water Authority which is required to test for diquat. Sample information shown below was taken by North Wales Water Authority.

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

 

34

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020ND110ND
2021N/A00N/A
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

NOTE: Warminster Municipal Authority purchases water from North Wales Water Authority which is required to test for diquat. Sample information shown below was taken by North Wales Water Authority.

Date Lab ID Result
2020-04-0122025478.00ND
2020-04-2022026083.00ND
2020-04-2022026173.00ND
2020-04-2022026113.00ND
2020-04-2022026143.00ND
2020-04-2722217305.00ND
2020-04-2722217275.00ND
2020-04-2722217335.00ND
2020-04-2722217394.00ND
2020-04-2722217365.00ND
2020-07-0622609701.00ND
2020-07-2722801142.00ND
2020-07-2722801169.00ND
2020-07-2722801112.00ND
2020-07-2722801202.00ND
2020-07-2722801082.00ND
2020-08-3123001503.00ND
2020-08-3123001475.00ND
2020-08-3123001419.00ND
2020-08-3123001447.00ND
2023-04-0328704928.00ND
2023-04-0328704927.00ND
2023-04-0328704931.00ND
2023-04-0328704930.00ND
2023-04-0328704929.00ND
2023-04-0428704932.00ND
2023-06-0529110379.00ND
2023-07-1029304293.00ND
2023-07-1029304292.00ND
2023-07-1029304290.00ND
2023-07-1029304289.00ND
2023-07-1129304294.00ND
2023-07-1129304291.00ND
2023-07-1129304295.00ND