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EWG's Tap Water Database — 2019 UPDATE

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cis-1,2-Dichloroethylene

Galveston County WCID 1

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.

 

18

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
2013ND30ND
2014ND30ND
2015ND30ND
2016ND50ND
2017ND40ND

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
2013-02-05AC09710ND
2013-02-05AC09706ND
2013-02-05AC09708ND
2014-06-03AC55813ND
2014-06-03AC55811ND
2014-06-03AC55805ND
2015-01-15AC76462ND
2015-01-15AC76456ND
2015-01-15AC76466ND
2016-01-26AD20090ND
2016-01-26AD20084ND
2016-06-27AD41911ND
2016-09-29AD52074ND
2016-11-29AD59385ND
2017-01-26AD67185ND
2017-01-26AD67177ND
2017-01-26AD67201ND
2017-04-25AD81207ND