1,1,1-Trichloroethane

Eastern Municipal Water District

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
2013	N/A	0	N/A
2014	ND	5	ND
2015	ND	6	ND
2016	ND	6	ND
2017	ND	7	ND
2018	ND	5	ND
2019	ND	6	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
2014-04-28	4790-071-0800	ND
2014-08-18	4790-081-0850	ND
2014-08-18	4790-071-0900	ND
2014-08-26	4790-063-1308	ND
2014-12-01	4790-071-0734	ND
2015-02-17	4790-071-0839	ND
2015-05-11	4790-071-0405	ND
2015-08-04	4790-063-1015	ND
2015-08-04	4790-071-0830	ND
2015-08-04	4790-081-0820	ND
2015-11-02	4790-071-0833	ND
2016-01-18	4790-071-0000	ND
2016-04-11	4790-071-0850	ND
2016-08-01	4790-071-0835	ND
2016-08-01	4790-081-0830	ND
2016-08-02	4790-063-0840	ND
2016-10-19	4790-071-1145	ND
2017-01-10	4790-071-0848	ND
2017-04-10	4790-071-0902	ND
2017-07-10	4790-071-0950	ND
2017-08-01	4790-063-1030	ND
2017-08-01	4790-081-1126	ND
2017-08-02	4790-071-0815	ND
2017-10-09	4790-071-0744	ND
2018-01-08	4790-071-0845	ND
2018-04-23	4790-071-0845	ND
2018-07-02	4790-081-0814	ND
2018-07-02	4790-063-0856	ND
2018-10-01	4790-071-0632	ND
2019-01-07	4790-071-0626	ND
2019-04-22	4790-071-0620	ND
2019-06-18	4790-106-0930	ND
2019-07-08	4790-063-1515	ND
2019-07-11	4790-081-1418	ND
2019-10-08	4790-071-0817	ND