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EWG's Tap Water Database — 2021 UPDATE

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cis-1,2-Dichloroethylene

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1,2-Dichloroethylene, a neurotoxic solvent, exists in two different forms: trans-1,2-dichloroethylene and cis-1,2-dichloroethylene. A mixture of the two forms is used to manufacture other solvents and chemical products.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND10ND
2015ND10ND
2016ND10ND
2017ND50ND
2018ND20ND
2019ND20ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 70 ppb

The legal limit for cis-1,2-dichloroethylene, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s.

ppb = parts per billion

All test results

Date Lab ID Result
2014-05-06Q1414702004ND
2015-04-08Q1513081001ND
2016-01-13Q1601453002ND
2017-01-17Q1701998014ND
2017-01-17Q1701998012ND
2017-06-08Q1724257007ND
2017-07-25Q1730595001ND
2017-12-04Q1762060002ND
2018-04-30Q1817200003ND
2018-04-30Q1817200005ND
2019-06-19Q1937815003ND
2019-06-19Q1937815005ND