Know Your Environment. Protect Your Health.

Diquat

Aqua Pa Uwchlan

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

 

25

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
2020N/A00N/A
2021N/A00N/A
2022ND20ND
2023ND230ND

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
2022-08-0327224172.00ND
2022-11-2927814145.00ND
2023-02-0728340604.00ND
2023-02-0728340544.00ND
2023-02-0728340574.00ND
2023-02-0728340664.00ND
2023-02-0728340634.00ND
2023-02-1428340901.00ND
2023-04-1728692531.00ND
2023-04-2028692465.00ND
2023-04-2028692495.00ND
2023-04-2028692435.00ND
2023-04-2628692561.00ND
2023-04-2628692591.00ND
2023-07-1129487114.00ND
2023-07-1129487167.00ND
2023-07-1729487199.00ND
2023-07-1729487142.00ND
2023-07-1729487227.00ND
2023-07-1729487255.00ND
2023-10-1630062491.00ND
2023-10-1630062435.00ND
2023-10-1630062463.00ND
2023-10-1830062407.00ND
2023-10-1830062376.00ND