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EWG's Tap Water Database — 2019 UPDATE

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cis-1,2-Dichloroethylene

Holliston Water Department

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.

 

27

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014ND90ND
2015ND60ND
2016ND60ND
2017ND60ND

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 Result
2014-03-12ND
2014-06-12ND
2014-06-12ND
2014-06-16ND
2014-06-16ND
2014-06-16ND
2014-06-16ND
2014-09-09ND
2014-11-04ND
2015-05-05ND
2015-05-05ND
2015-05-12ND
2015-05-19ND
2015-05-19ND
2015-05-19ND
2016-05-03ND
2016-05-03ND
2016-05-03ND
2016-05-03ND
2016-05-24ND
2016-05-24ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND