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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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND10ND
2015ND20ND
2016ND40ND
2017ND40ND
2018ND30ND
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
2014-09-0214247003501ND
2015-07-2715211000201ND
2015-10-2615302000201ND
2016-01-2616028001201ND
2016-05-3016154000501ND
2016-08-0316217005201ND
2016-11-0816314006809ND
2017-02-0717039001701ND
2017-05-0117123001601ND
2017-08-0117215004001ND
2017-10-3017306001801ND
2018-02-2618060001401ND
2018-05-2218144006601ND
2018-08-2818242000601ND
2019-06-0319157001901ND
2019-09-1019255001201ND