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EWG's Tap Water Database — 2019 UPDATE

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trans-1,2-Dichloroethylene

Marshall Waterworks

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
2012ND40ND
2013ND80ND
2014ND40ND
2015N/A00N/A
2016N/A00N/A
2017ND20ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 60 ppb

The EWG Health Guideline of 60 ppb for trans-1,2-dichloroethylene was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.

EPA Maximum Contaminant
Level (MCL) 100 ppb

The legal limit for trans-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
2012-06-19OW004720ND
2012-06-19OW004719ND
2012-09-10OX000854ND
2012-11-05OX001574ND
2013-02-12OX002419ND
2013-02-12OX002418ND
2013-02-12OX002417ND
2013-04-02OX002886ND
2013-07-01OY000002ND
2013-07-08OY000057ND
2013-07-08OY000055ND
2013-07-08OY000056ND
2014-02-05118447001ND
2014-02-11119095001ND
2014-02-19120152001ND
2014-07-15145217001ND
2017-07-181004617ND
2017-07-181004620ND