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EWG's Tap Water Database — 2021 UPDATE

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cis-1,2-Dichloroethylene

Marshall Waterworks

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
2014ND90ND
2015ND10ND
2016ND90ND
20170.190 ppb103ND - 0.700 ppb
20180.280 ppb52ND - 0.700 ppb
20190.233 ppb31ND - 0.700 ppb

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
2014-01-14E131200005ND
2014-02-10E141204239ND
2014-04-07E140304239ND
2014-07-08E140601326ND
2014-07-08E140601325ND
2014-07-08E140601332ND
2014-08-0438295ND
2014-10-28E140802398ND
2014-10-28E140802403ND
2015-07-14VA010-DCLSND
2016-02-10E151204276ND
2016-02-10E151204275ND
2016-05-11E160303032ND
2016-05-11E160303031ND
2016-07-19E160703075ND
2016-07-19E160703077ND
2016-07-19E160703076ND
2016-12-01E160901673ND
2016-12-01E160901674ND
2017-02-28E161201879ND
2017-02-28E161201878ND
2017-06-20E1703028230.600 ppb
2017-06-20E170302822ND
2017-08-29E170600341ND
2017-08-30E170600336ND
2017-08-30E1706003400.600 ppb
2017-08-30E170600333ND
2017-12-06E1708055030.700 ppb
2017-12-06E170805508ND
2018-03-14E171205668ND
2018-03-14E1712056710.700 ppb
2018-06-20E1803050180.700 ppb
2018-06-20E180305019ND
2018-07-10E180606190ND
2019-06-11E1903067470.700 ppb
2019-06-11E190306749ND
2019-07-09E190606453ND