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EWG's Tap Water Database — 2019 UPDATE

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cis-1,2-Dichloroethylene

Waterloo Water Works

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.0756 ppb91ND - 0.680 ppb
2013ND40ND
20140.590 ppb110.590 ppb
20151.03 ppb111.03 ppb
2016N/A00N/A
2017N/A00N/A

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 Lab ID Result
2012-10-231942201ND
2012-10-231942204ND
2012-10-231942205ND
2012-10-231942206ND
2012-10-231942198ND
2012-10-2319421990.680 ppb
2012-10-231942200ND
2012-10-231942203ND
2012-10-231942202ND
2013-03-271968434ND
2013-06-191985833ND
2013-07-231993063ND
2013-12-052023801ND
2014-10-2220881660.590 ppb
2015-10-131J51068-011.03 ppb