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EWG's Tap Water Database — 2019 UPDATE

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cis-1,2-Dichloroethylene

Holden Water Division, DPW

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.

 

49

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.421 ppb83ND - 1.41 ppb
20130.611 ppb83ND - 2.00 ppb
20140.975 ppb84ND - 2.40 ppb
20150.875 ppb84ND - 2.10 ppb
20161.13 ppb95ND - 2.40 ppb
20170.751 ppb84ND - 1.91 ppb

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
2012-01-051.18 ppb
2012-05-08ND
2012-05-08ND
2012-05-08ND
2012-05-08ND
2012-06-11ND
2012-08-220.780 ppb
2012-11-201.41 ppb
2013-02-20ND
2013-05-161.25 ppb
2013-05-16ND
2013-05-16ND
2013-05-16ND
2013-05-16ND
2013-08-211.64 ppb
2013-11-182.00 ppb
2014-02-182.40 ppb
2014-05-20ND
2014-05-202.00 ppb
2014-05-20ND
2014-05-20ND
2014-05-20ND
2014-08-201.40 ppb
2014-11-192.00 ppb
2015-02-182.10 ppb
2015-05-19ND
2015-05-191.70 ppb
2015-05-19ND
2015-05-19ND
2015-05-19ND
2015-08-181.80 ppb
2015-11-171.40 ppb
2016-02-022.30 ppb
2016-02-162.40 ppb
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-171.80 ppb
2016-09-061.60 ppb
2016-11-152.08 ppb
2017-02-211.91 ppb
2017-05-161.50 ppb
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-08-151.10 ppb
2017-11-211.50 ppb