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EWG's Tap Water Database — 2021 UPDATE

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cis-1,2-Dichloroethylene

Aqua Pa Uwchlan

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.

MORE ABOUT THIS CONTAMINANT

 

37

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND60ND
2015ND60ND
2016ND60ND
2017ND60ND
2018ND60ND
2019ND70ND

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
2014-02-06AE22430ND
2014-02-14AE22387ND
2014-02-14AE22385ND
2014-02-21AE23943ND
2014-02-21AE23946ND
2014-04-23AE29861ND
2015-02-0312395450ND
2015-02-0312395492ND
2015-02-0312395513ND
2015-02-0312395534ND
2015-02-0412395429ND
2015-02-0412395471ND
2016-01-2213746274ND
2016-01-2213746253ND
2016-01-2213746211ND
2016-01-2213746232ND
2016-02-1013864178ND
2016-02-1013864199ND
2017-03-2815787972ND
2017-03-2815787951ND
2017-04-1915928758ND
2017-04-1915928779ND
2017-04-2115928737ND
2017-06-2116249802ND
2018-01-29AF74449ND
2018-01-31AF73819ND
2018-02-26AF76934ND
2018-02-26AF76935ND
2018-03-13AF77984ND
2018-03-13AF77985ND
2019-03-06AG10267ND
2019-03-06AG10268ND
2019-03-06AG10266ND
2019-03-12AG10439ND
2019-03-12AG10441ND
2019-03-27AG11746ND
2019-11-07AG37520ND