cis-1,2-Dichloroethylene

Lca Wlsa Central Division

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	13	ND
2015	ND	4	ND
2016	ND	3	ND
2017	ND	11	ND
2018	ND	4	ND
2019	ND	4	ND

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
2014-03-05	14022333-01	ND
2014-03-05	14022333-06	ND
2014-03-05	14022333-05	ND
2014-03-05	14022333-04	ND
2014-03-05	14022333-02	ND
2014-03-05	14022333-03	ND
2014-03-12	14030864-03	ND
2014-03-12	14030864-04	ND
2014-03-12	14030864-05	ND
2014-03-12	14030864-06	ND
2014-03-12	14030864-02	ND
2014-03-12	14030864-01	ND
2014-03-26	14032553-01	ND
2015-02-04	12435983	ND
2015-02-19	12436006	ND
2015-02-19	12436029	ND
2015-03-18	12550667	ND
2016-06-21	14455947	ND
2016-08-18	14786684	ND
2016-08-18	14786655	ND
2017-07-10	16459214	ND
2017-07-10	16459256	ND
2017-07-10	16459235	ND
2017-07-20	16613947	ND
2017-07-20	16613796	ND
2017-07-20	16613898	ND
2017-07-26	16613847	ND
2017-07-27	16614029	ND
2017-08-01	16613723	ND
2017-08-10	16614082	ND
2017-08-29	16772987	ND
2018-03-16	8032172-01	ND
2018-08-23	8074081-07	ND
2018-08-23	8074081-02	ND
2018-08-23	8074081-05	ND
2019-07-11	9072953-01	ND
2019-08-08	9076334-01	ND
2019-08-22	9076420-02	ND
2019-09-16	9076421-02	ND