Know Your Environment. Protect Your Health.

Diquat

Swisshome Village

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

 

7

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND10ND
2020N/A00N/A
2021ND10ND
2022N/A00N/A
2023ND10ND

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
2018-03-281803B56002-SND
2018-06-131806645001-SND
2018-09-051809175001-SND
2018-12-271812A69001-SND
2019-03-181903630002-SND
2021-04-272128492-SND
2023-10-2623101147-02A-SND