Know Your Environment. Protect Your Health.

Diquat

Cullman Utilities Board

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

 

19

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
2019ND20ND
2020ND20ND
2021ND40ND
2022ND70ND
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
2019-06-25L1112381-04ND
2019-09-09L1137160-06ND
2020-09-1420171269001_ISOCND
2020-10-2120176646001_ISOCND
2021-03-1235618627001_ISOCND
2021-05-2435635607001_ISOCND
2021-08-0935654106001_ISOCND
2021-11-1535678186001_ISOCND
2022-01-1935691430001_ISOCND
2022-03-1635704232001_ISOCND
2022-04-2035712316001_ISOCND
2022-09-2135748352001_ISOCND
2022-10-1935754173001_ISOCND
2022-10-1935754173003_ISOCND
2022-11-21DC09899-01ND
2023-01-1935773717001_ISOCND
2023-04-2535794896001_ISOCND
2023-07-2735815989001_ISOCND
2023-10-1735835047001_ISOCND