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EWG's Tap Water Database — 2021 UPDATE

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Diquat

Phoenix Mobile Home Park of Lake Charles LLC W S

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

 

8

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND20ND
2015N/A00N/A
2016ND20ND
2017ND40ND
2018N/A00N/A
2019N/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
2014-09-02AD96339ND
2014-09-02AD96339ND
2016-03-1535234285005ND
2016-03-1535234285005ND
2017-06-1935319492005ND
2017-06-1935319492005ND
2017-06-2635320781006ND
2017-06-2635320781006ND