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EWG's Tap Water Database — 2019 UPDATE

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Diquat

Kingman Municipal Water

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
2012ND150ND
2013N/A00N/A
2014N/A00N/A
2015ND120ND
2016ND20ND
2017N/A00N/A

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
2012-02-13PVB1003-06ND
2012-02-13PVB1003-05ND
2012-02-13PVB1003-04ND
2012-02-13PVB1003-03ND
2012-02-13PVB1003-02ND
2012-02-13PVB1003-01ND
2012-07-09PVG0619-03SND
2012-07-09PVG0619-03ND
2012-07-09PVG0619-02SND
2012-07-09PVG0619-02ND
2012-07-09PVG0619-01SND
2012-07-09PVG0619-01ND
2012-08-26PVH2032-01ND
2012-08-26PVH2032-03ND
2012-08-26PVH2032-02ND
2015-02-09550-39973-1ND
2015-02-09550-39972-1ND
2015-02-09550-39970-1ND
2015-02-17550-40405-1ND
2015-02-17550-40404-1ND
2015-02-17550-40403-1ND
2015-08-17550-49709-1ND
2015-08-17550-49708-1ND
2015-08-17550-49707-1ND
2015-08-17550-49706-1ND
2015-08-17550-49705-1ND
2015-08-17550-49703-1ND
2016-02-16550-59042-1ND
2016-07-12550-66385-1SND