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EWG's Tap Water Database — 2021 UPDATE

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Diquat

City of Pocatello

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

MORE ABOUT THIS CONTAMINANT

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018ND10ND
2019ND160ND

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2018-05-02SI80502301ND
2019-10-08SI91009201ND
2019-10-08SI91009208ND
2019-10-08SI91009207ND
2019-10-08SI91009206ND
2019-10-08SI91009205ND
2019-10-08SI91009204ND
2019-10-08SI91009203ND
2019-10-08SI91009202ND
2019-10-08SI91008801ND
2019-10-08SI91008808ND
2019-10-08SI91008807ND
2019-10-08SI91008806ND
2019-10-08SI91008805ND
2019-10-08SI91008804ND
2019-10-08SI91008803ND
2019-10-08SI91008802ND