Know Your Environment. Protect Your Health.

Diquat

Pennsylvania American Royersford

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

 

21

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
2023ND100ND

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
2020-04-0822016230.00ND
2020-04-0822016114.00ND
2020-04-1522016315.00ND
2020-04-1522016287.00ND
2020-04-1522016259.00ND
2020-07-0722601604.00ND
2020-08-0422792308.00ND
2020-08-0522792293.00ND
2020-08-1122792237.00ND
2020-08-1122792265.00ND
2020-08-1822792678.00ND
2023-05-0128893351.00ND
2023-05-0128893379.00ND
2023-05-0128893311.00ND
2023-05-1128893349.00ND
2023-05-1128893407.00ND
2023-07-0629296056.00ND
2023-08-1029491104.00ND
2023-08-1029491071.00ND
2023-08-1029491127.00ND
2023-08-1029491040.00ND