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EWG's Tap Water Database — 2021 UPDATE

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1,1-Dichloroethylene

Pennsylvania American Royersford

1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.

MORE ABOUT THIS CONTAMINANT

 

36

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND90ND
2015ND100ND
2016ND40ND
2017ND50ND
2018ND40ND
2019ND40ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 7 ppb

The legal limit for 1,1-dichloroethylene, established in 1987, was based on a toxicity study conducted in laboratory animals in the 1980s.

ppb = parts per billion

All test results

Date Lab ID Result
2014-04-0225340001ND
2014-04-0225341501ND
2014-04-0325340301ND
2014-04-0325340801ND
2014-06-2525340501ND
2014-08-0626818001ND
2014-08-0626818101ND
2014-10-0627103901ND
2014-10-0627104001ND
2015-01-0812283052ND
2015-01-0812283031ND
2015-04-0912628872ND
2015-04-0912628937ND
2015-04-0912628893ND
2015-04-0912628914ND
2015-07-1313008753ND
2015-09-1613260279ND
2015-10-0613385319ND
2015-10-0613385340ND
2016-04-0514097855ND
2016-04-0514097876ND
2016-04-0514097834ND
2016-04-0514097899ND
2017-04-1115931667ND
2017-04-1115931623ND
2017-04-1115931602ND
2017-04-1115931581ND
2017-04-1115931644ND
2018-04-1139073401ND
2018-04-1139072901ND
2018-04-1139074201ND
2018-04-1139073001ND
2019-04-0843659301ND
2019-04-0843660501ND
2019-04-0843660601ND
2019-04-2343659401ND