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EWG's Tap Water Database — 2021 UPDATE

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1,1-Dichloroethylene

Acton Water Supply District

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

MORE ABOUT THIS CONTAMINANT

 

103

Samples

1

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.332 ppb192ND - 3.90 ppb
20151.11 ppb164ND - 10.8 ppb
20160.181 ppb181ND - 3.25 ppb
20170.165 ppb172ND - 1.90 ppb
20180.207 ppb152ND - 1.90 ppb
20190.0950 ppb181ND - 1.71 ppb

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
2014-02-20ND
2014-05-19ND
2014-07-16ND
2014-07-16ND
2014-07-16ND
2014-08-04ND
2014-08-04ND
2014-08-043.90 ppb
2014-08-04ND
2014-08-04ND
2014-08-04ND
2014-08-042.40 ppb
2014-08-15ND
2014-08-15ND
2014-08-15ND
2014-08-15ND
2014-08-15ND
2014-08-26ND
2014-10-20ND
2015-06-26ND
2015-08-03ND
2015-08-03ND
2015-08-03ND
2015-08-03ND
2015-08-03ND
2015-08-17ND
2015-08-175.96 ppb
2015-08-170.530 ppb
2015-08-17ND
2015-08-170.530 ppb
2015-08-1710.8 ppb
2015-09-14ND
2015-09-14ND
2015-09-14ND
2015-11-30ND
2016-02-10ND
2016-06-06ND
2016-07-14ND
2016-07-25ND
2016-07-29ND
2016-07-29ND
2016-07-29ND
2016-08-08ND
2016-09-07ND
2016-09-07ND
2016-09-07ND
2016-09-07ND
2016-09-07ND
2016-09-073.25 ppb
2016-09-22ND
2016-09-22ND
2016-09-22ND
2016-11-17ND
2017-02-01ND
2017-05-03ND
2017-07-12ND
2017-07-12ND
2017-07-12ND
2017-07-27ND
2017-07-27ND
2017-08-09ND
2017-08-090.900 ppb
2017-08-09ND
2017-08-09ND
2017-08-09ND
2017-08-091.90 ppb
2017-12-11ND
2017-12-11ND
2017-12-11ND
2017-12-11ND
2018-03-14ND
2018-06-11ND
2018-07-26ND
2018-07-26ND
2018-07-26ND
2018-09-05ND
2018-09-05ND
2018-09-05ND
2018-09-19ND
2018-09-191.20 ppb
2018-09-19ND
2018-09-19ND
2018-09-19ND
2018-09-191.90 ppb
2018-12-10ND
2019-03-26ND
2019-05-14ND
2019-07-24ND
2019-07-24ND
2019-07-25ND
2019-07-25ND
2019-07-25ND
2019-07-25ND
2019-07-31ND
2019-07-31ND
2019-09-10ND
2019-09-16ND
2019-09-16ND
2019-09-16ND
2019-09-16ND
2019-09-16ND
2019-09-161.71 ppb
2019-12-11ND