Know Your Environment. Protect Your Health.

Diquat

Gettysburg Municipal Authority

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

 

29

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
2020ND150ND
2021N/A00N/A
2022N/A00N/A
2023ND140ND

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
2020-05-1222350009.00ND
2020-05-1222349980.00ND
2020-05-1222349922.00ND
2020-05-1822350041.00ND
2020-05-1822349954.00ND
2020-05-2022349867.00ND
2020-05-2022349896.00ND
2020-08-1822937362.00ND
2020-08-1822937304.00ND
2020-08-1922937333.00ND
2020-08-1922937391.00ND
2020-08-2423125293.00ND
2020-08-2423125264.00ND
2020-08-2423125322.00ND
2020-12-0223656067.00ND
2023-05-1629242394.00ND
2023-05-1629242338.00ND
2023-05-1629242366.00ND
2023-05-1729242803.00ND
2023-05-1729242775.00ND
2023-05-1729242747.00ND
2023-05-3029242724.00ND
2023-08-0129639337.00ND
2023-08-0129639257.00ND
2023-08-1529639302.00ND
2023-08-1629829433.00ND
2023-08-1629829408.00ND
2023-08-2229829494.00ND
2023-08-2229829466.00ND