Know Your Environment. Protect Your Health.

Diquat

Duncannon Municipal Water

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

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019N/A00N/A
2020ND40ND
2021ND40ND
2022N/A00N/A
2023ND30ND

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
2018-11-138034793-01ND
2020-05-1122380579.00ND
2020-05-1822380555.00ND
2020-05-2622576467.00ND
2020-06-0122576496.00ND
2021-02-1524214602.00ND
2021-05-1124798790.00ND
2021-08-2425374674.00ND
2021-12-2825914328.00ND
2023-06-0629271833.00ND
2023-06-0629271806.00ND
2023-06-3029464796.00ND