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EWG's Tap Water Database — 2019 UPDATE

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cis-1,2-Dichloroethylene

Pennsylvania American Royersford

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.

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND20ND
2014ND90ND
2015ND100ND
2016ND40ND
2017ND50ND

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
2012-02-0816353301ND
2012-02-0816353901ND
2013-04-2321984601ND
2013-04-2321984701ND
2014-04-0225340001ND
2014-04-0225341501ND
2014-04-0325340301ND
2014-04-0325340801ND
2014-06-2525340501ND
2014-08-0626818001ND
2014-08-0626818101ND
2014-10-0627104001ND
2014-10-0627103901ND
2015-01-0812283045ND
2015-01-0812283024ND
2015-04-0912628865ND
2015-04-0912628886ND
2015-04-0912628930ND
2015-04-0912628907ND
2015-07-1313008746ND
2015-09-1613260272ND
2015-10-0613385333ND
2015-10-0613385312ND
2016-04-0514097869ND
2016-04-0514097827ND
2016-04-0514097892ND
2016-04-0514097848ND
2017-04-1115931637ND
2017-04-1115931574ND
2017-04-1115931660ND
2017-04-1115931595ND
2017-04-1115931616ND