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EWG's Tap Water Database — 2019 UPDATE

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Diquat

Loves Park

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

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND100ND
2013N/A00N/A
2014N/A00N/A
2015ND100ND
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
2012-09-10SI20387-01_01ND
2012-09-11SI20495-01_01ND
2012-09-12SI20572-01_01ND
2012-09-19SI20957-01_01ND
2012-09-26SI21328-01_01ND
2012-11-07SK20277-01_01ND
2012-11-12SK20417-01_01ND
2012-11-13SK20527-01_01ND
2012-11-28SK20943-01_01ND
2012-12-03SL20051-01_01ND
2015-07-135072916-04ND
2015-07-135072916-03ND
2015-07-135072916-02ND
2015-07-135072916-01ND
2015-07-145072916-05ND
2015-11-165113115-02ND
2015-11-165113115-01ND
2015-11-165113115-03ND
2015-11-165113115-04ND
2015-11-165113115-05ND