Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

1,1-Dichloroethylene

Wellesley Water Division (MWRA)

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

MORE ABOUT THIS CONTAMINANT

 

68

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND90ND
2015ND120ND
2016ND120ND
2017ND120ND
2018ND120ND
2019ND110ND

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 Result
2014-05-05ND
2014-05-05ND
2014-05-05ND
2014-08-04ND
2014-08-04ND
2014-08-04ND
2014-11-06ND
2014-11-06ND
2014-11-06ND
2015-03-11ND
2015-03-11ND
2015-03-11ND
2015-05-06ND
2015-05-06ND
2015-05-06ND
2015-08-06ND
2015-08-06ND
2015-08-06ND
2015-11-05ND
2015-11-05ND
2015-11-05ND
2016-02-03ND
2016-02-03ND
2016-03-08ND
2016-05-04ND
2016-05-04ND
2016-05-04ND
2016-08-03ND
2016-08-03ND
2016-08-03ND
2016-11-03ND
2016-11-03ND
2016-11-03ND
2017-02-01ND
2017-02-01ND
2017-02-01ND
2017-05-03ND
2017-05-03ND
2017-05-03ND
2017-08-29ND
2017-08-29ND
2017-08-29ND
2017-11-06ND
2017-11-06ND
2017-11-06ND
2018-02-08ND
2018-02-08ND
2018-02-08ND
2018-05-03ND
2018-05-03ND
2018-05-03ND
2018-08-01ND
2018-08-01ND
2018-08-01ND
2018-11-01ND
2018-11-01ND
2018-11-01ND
2019-02-04ND
2019-02-04ND
2019-02-04ND
2019-05-01ND
2019-05-01ND
2019-08-02ND
2019-08-02ND
2019-08-02ND
2019-11-07ND
2019-11-07ND
2019-11-07ND