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EWG's Tap Water Database — 2019 UPDATE

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Diquat

City of Lexington

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
2012ND40ND
2013ND100ND
2014N/A00N/A
2015ND40ND
2016N/A00N/A
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
2012-04-09168286ND
2012-04-09168287ND
2012-07-09186905ND
2012-07-09186904ND
2013-02-25219524ND
2013-02-25219523ND
2013-02-25219522ND
2013-02-25219520ND
2013-02-25219519ND
2013-02-25219518ND
2013-02-25219517ND
2013-02-25219516ND
2013-02-25219515ND
2013-02-25219525ND
2015-04-20357165ND
2015-04-20357166ND
2015-07-13375234ND
2015-07-13375235ND