Know Your Environment. Protect Your Health.

Diquat

Lehigh County Authority Allentown Division

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

 

18

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
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
2020-04-0822077915.00ND
2020-04-1422077871.00ND
2020-04-1422077835.00ND
2020-04-2222078449.00ND
2020-07-0822660555.00ND
2020-07-1622660595.00ND
2020-07-2222660669.00ND
2020-07-2222660631.00ND
2023-04-1128759078.00ND
2023-04-1128759079.00ND
2023-04-1928759255.00ND
2023-04-2628958428.00ND
2023-04-2628958427.00ND
2023-07-1129355944.00ND
2023-07-1129355943.00ND
2023-07-1829355881.00ND
2023-07-1829355882.00ND
2023-07-2529554452.00ND