1,1,1-Trichloroethane

East Hempfield Water Authority

1,1,1-Trichloroethane is a solvent and a degreasing agent used for manufacturing metal products and as ingredient in cleaners and aerosols. Exposure to 1,1,1-trichloroethane can harm the nervous system, liver and circulatory system.

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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	7	ND
2015	ND	4	ND
2016	ND	4	ND
2017	ND	13	ND
2018	ND	5	ND
2019	ND	4	ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 200 ppb

The legal limit for 1,1,1-trichloroethane, established in 1987, was based on toxicity studies conducted in laboratory animals in the 1970s and 1980s.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-09-30	14032956-01	ND
2014-09-30	14032956-02	ND
2014-09-30	14032956-03	ND
2014-09-30	14032956-04	ND
2014-12-29	14122146-01	ND
2014-12-29	14122146-02	ND
2014-12-29	14122146-03	ND
2015-09-15	13360712	ND
2015-09-15	13360733	ND
2015-09-15	13360691	ND
2015-09-15	13360754	ND
2016-12-27	15481339	ND
2016-12-27	15481318	ND
2016-12-27	15481360	ND
2016-12-27	15481297	ND
2017-03-16	15901262	ND
2017-03-16	15901283	ND
2017-03-16	15901511	ND
2017-03-16	15901304	ND
2017-03-16	15901241	ND
2017-05-23	16218719	ND
2017-05-23	16218740	ND
2017-05-23	16218470	ND
2017-05-23	16218449	ND
2017-08-30	16844205	ND
2017-08-30	16844226	ND
2017-11-15	17129207	ND
2017-11-15	17129186	ND
2018-02-28	7104860-01	ND
2018-06-06	8044976-01	ND
2018-06-06	8044976-02	ND
2018-06-06	8044976-03	ND
2018-11-19	8015122-01	ND
2019-05-20	9045072-01	ND
2019-05-20	9045072-02	ND
2019-05-20	9045072-03	ND
2019-08-21	9085002-03	ND