trans-1,2-Dichloroethylene

City of Plaquemine Water System

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.

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Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	ND	8	ND
2015	N/A	0	N/A
2016	ND	10	ND
2017	N/A	0	N/A
2018	N/A	0	N/A
2019	ND	10	ND

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
2014-05-19	AD91670	ND
2014-05-19	AD91670	ND
2014-05-21	AD91672	ND
2014-05-21	AD91671	ND
2014-05-21	AD91672	ND
2014-05-21	AD91673	ND
2014-05-21	AD91671	ND
2014-05-21	AD91673	ND
2016-06-20	35250786003	ND
2016-06-20	35250786004	ND
2016-06-20	35250786005	ND
2016-06-20	35250786002	ND
2016-06-20	35250786001	ND
2016-06-20	35250786005	ND
2016-06-20	35250786001	ND
2016-06-20	35250786002	ND
2016-06-20	35250786003	ND
2016-06-20	35250786004	ND
2019-05-20	35469857002	ND
2019-05-20	35469857001	ND
2019-05-20	35469857001	ND
2019-05-20	35469857002	ND
2019-05-21	35470500001	ND
2019-05-21	35470500002	ND
2019-05-21	35470500001	ND
2019-05-21	35470500002	ND
2019-06-12	35475393005	ND
2019-06-12	35475393005	ND