Know Your Environment. Protect Your Health.

Diquat

Schuylkill County. Municipal Authority

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

 

16

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
2020ND80ND
2021N/A00N/A
2022N/A00N/A
2023ND80ND

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
2020-04-2922281724.00ND
2020-04-2922281695.00ND
2020-04-2922281782.00ND
2020-04-2922281753.00ND
2020-07-2922864902.00ND
2020-07-2922864873.00ND
2020-07-2922864844.00ND
2020-08-0622864943.00ND
2023-05-0829175405.00ND
2023-05-0929175406.00ND
2023-05-1029175408.00ND
2023-05-1129175407.00ND
2023-08-0329762928.00ND
2023-08-0429762927.00ND
2023-08-0929763027.00ND
2023-08-0929763028.00ND