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EWG's Tap Water Database — 2019 UPDATE

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Diquat

City of North Platte

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

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND140ND
2013ND10ND
2014N/A00N/A
2015ND20ND
2016ND10ND
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
2012-04-23166744ND
2012-07-23186763ND
2012-07-23166754ND
2012-07-23166753ND
2012-07-23166752ND
2012-07-23166756ND
2012-07-23166751ND
2012-07-23166750ND
2012-07-23166749ND
2012-07-23166748ND
2012-07-23166747ND
2012-07-23166746ND
2012-07-23166745ND
2012-07-23166755ND
2013-04-24231089ND
2015-04-22356640ND
2015-07-08375076ND
2016-05-02ND