cis-1,2-Dichloroethylene

Altoona Water Authority

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
2013	N/A	0	N/A
2014	ND	6	ND
2015	ND	6	ND
2016	ND	5	ND
2017	ND	6	ND
2018	ND	6	ND
2019	ND	5	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
2014-08-07	4H07065-01	ND
2014-08-07	4H07067-01	ND
2014-08-08	4H08030-01	ND
2014-08-08	4H08045-01	ND
2014-08-08	4H08031-01	ND
2014-08-08	4H08044-01	ND
2015-07-22	13058941	ND
2015-07-22	13058962	ND
2015-07-22	13058983	ND
2015-07-22	13059046	ND
2015-07-22	13059004	ND
2015-07-22	13059025	ND
2016-07-13	14631768	ND
2016-07-13	14631814	ND
2016-07-13	14631791	ND
2016-07-13	14631745	ND
2016-07-14	14632180	ND
2017-02-14	15705259	ND
2017-08-08	16624627	ND
2017-08-08	16624606	ND
2017-08-08	16624648	ND
2017-08-08	16624669	ND
2017-08-16	16624706	ND
2018-08-28	8H28047-01	ND
2018-08-28	8H28031-01	ND
2018-08-28	8H28032-01	ND
2018-08-28	8H28051-01	ND
2018-08-28	8H28044-01	ND
2018-08-28	8H28046-01	ND
2019-11-06	9K07058-03	ND
2019-11-06	9K07058-01	ND
2019-11-07	9K07074-01	ND
2019-11-07	9K07072-01	ND
2019-12-05	9L05126-01	ND