1,1,1-Trichloroethane

Schwenksville Borough 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	6	ND
2015	ND	5	ND
2016	ND	4	ND
2017	ND	5	ND
2018	ND	8	ND
2019	ND	5	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
2014-03-13	140010537	ND
2014-03-13	140010536	ND
2014-03-13	140010540	ND
2014-03-13	140010539	ND
2014-03-13	140010538	ND
2014-10-07	140045435	ND
2015-02-05	12402640	ND
2015-02-05	12402662	ND
2015-02-05	12402685	ND
2015-02-05	12402714	ND
2015-06-04	12883397	ND
2016-03-03	13987026	ND
2016-03-03	13987001	ND
2016-03-03	13986985	ND
2016-06-02	14406551	ND
2017-01-26	15656676	ND
2017-01-26	15656675	ND
2017-06-01	16095935	ND
2017-12-18	17163158	ND
2017-12-18	17163136	ND
2018-01-31	8002367-04	ND
2018-01-31	8002367-01	ND
2018-01-31	8002367-02	ND
2018-01-31	8002367-03	ND
2018-04-16	8010173-01	ND
2018-05-04	8012268-01	ND
2018-07-16	8019952-01	ND
2018-10-15	8029253-01	ND
2019-02-01	9003521-04	ND
2019-02-01	9003521-01	ND
2019-02-01	9003521-02	ND
2019-02-01	9003521-03	ND
2019-05-01	9013602-01	ND