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EWG's Tap Water Database — 2021 UPDATE

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cis-1,2-Dichloroethylene

Borough of Atglen

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
2014ND50ND
2015ND10ND
2016ND10ND
2017ND30ND
2018ND10ND
2019ND10ND

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
2014-03-191077387001ND
2014-06-232014203001ND
2014-07-292021224001ND
2014-09-152029178001ND
2014-12-082044696001ND
2015-06-2212876742ND
2016-11-2215221162ND
2017-04-1115930753ND
2017-05-0216088381ND
2017-12-1917156503ND
2018-05-018041270-01ND
2019-04-099041375-01ND