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EWG's Tap Water Database — 2021 UPDATE

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cis-1,2-Dichloroethylene

Shannon

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND30ND
2015ND10ND
2016ND20ND
2017ND10ND
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
2014-02-11SB40241-01_01ND
2014-06-10SF40505-01_01ND
2014-08-05SH40335-01_01ND
2015-05-19SE50790-01_01ND
2016-05-2416E1004-01_01ND
2016-09-1316I0465-01_01ND
2017-05-3117F0005-01_01ND
2018-05-2218E0945-01ND
2019-08-1319H0556-01ND