cis-1,2-Dichloroethylene

City of Lake Mary

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	10	ND
2015	ND	12	ND
2016	ND	12	ND
2017	ND	12	ND
2018	ND	12	ND
2019	ND	10	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	Result
2014-01-13	ND
2014-02-03	ND
2014-03-18	ND
2014-04-07	ND
2014-05-05	ND
2014-06-02	ND
2014-08-11	ND
2014-09-02	ND
2014-11-03	ND
2014-12-08	ND
2015-01-05	ND
2015-02-02	ND
2015-03-02	ND
2015-04-06	ND
2015-05-04	ND
2015-06-01	ND
2015-07-06	ND
2015-08-03	ND
2015-09-01	ND
2015-10-05	ND
2015-11-02	ND
2015-12-07	ND
2016-01-04	ND
2016-02-01	ND
2016-03-07	ND
2016-04-13	ND
2016-05-03	ND
2016-06-06	ND
2016-07-07	ND
2016-08-02	ND
2016-09-14	ND
2016-10-04	ND
2016-11-03	ND
2016-12-05	ND
2017-01-04	ND
2017-02-01	ND
2017-03-01	ND
2017-04-04	ND
2017-05-03	ND
2017-06-12	ND
2017-07-05	ND
2017-08-01	ND
2017-09-06	ND
2017-10-11	ND
2017-11-01	ND
2017-12-04	ND
2018-01-04	ND
2018-02-01	ND
2018-03-07	ND
2018-04-04	ND
2018-05-02	ND
2018-06-13	ND
2018-07-10	ND
2018-08-01	ND
2018-09-12	ND
2018-10-03	ND
2018-11-07	ND
2018-12-12	ND
2019-01-09	ND
2019-02-04	ND
2019-02-05	ND
2019-03-05	ND
2019-05-02	ND
2019-06-04	ND
2019-07-10	ND
2019-08-08	ND
2019-09-11	ND
2019-11-13	ND