Know Your Environment. Protect Your Health.

Diquat

Logansport Water System

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
2018ND40ND
2019ND40ND
2020ND20ND
2021ND20ND
2022ND20ND
2023ND20ND

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
2018-01-2335370034001ND
2018-01-2335370034001ND
2018-08-0635409596001ND
2018-08-0635409596001ND
2019-03-1335454724001ND
2019-03-1335454724001ND
2019-07-3135486401001ND
2019-07-3135486401001ND
2020-02-0335528230001ND
2020-09-2235579690001ND
2021-01-1335604986001ND
2021-08-1735657244003ND
2022-02-2235699238002EFND
2022-08-2235742155003ND
2023-02-0735778295006ND
2023-08-2135823290001ND