1,1,1-Trichloroethane

Grafton 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.

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	1.89 ppb	9	1	ND - 17.0 ppb
2015	2.00 ppb	10	1	ND - 20.0 ppb
2016	1.89 ppb	9	1	ND - 17.0 ppb
2017	2.97 ppb	9	2	ND - 20.0 ppb
2018	1.02 ppb	9	1	ND - 9.19 ppb
2019	ND	12	0	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	Result
2014-01-29	ND
2014-04-07	ND
2014-05-12	ND
2014-05-12	ND
2014-05-12	ND
2014-05-12	17.0 ppb
2014-05-12	ND
2014-07-15	ND
2014-11-03	ND
2015-01-21	ND
2015-04-14	20.0 ppb
2015-04-14	ND
2015-04-14	ND
2015-04-14	ND
2015-04-14	ND
2015-04-27	ND
2015-07-14	ND
2015-10-21	ND
2015-11-09	ND
2016-02-02	ND
2016-04-14	17.0 ppb
2016-04-14	ND
2016-04-14	ND
2016-04-14	ND
2016-04-14	ND
2016-06-09	ND
2016-07-20	ND
2016-10-07	ND
2017-02-22	ND
2017-02-22	20.0 ppb
2017-05-03	ND
2017-05-03	ND
2017-05-03	6.75 ppb
2017-05-31	ND
2017-05-31	ND
2017-05-31	ND
2017-10-17	ND
2018-02-14	ND
2018-04-19	ND
2018-04-19	ND
2018-04-19	9.19 ppb
2018-04-19	ND
2018-04-19	ND
2018-06-27	ND
2018-08-02	ND
2018-11-06	ND
2019-01-16	ND
2019-02-26	ND
2019-05-08	ND
2019-05-08	ND
2019-05-08	ND
2019-05-20	ND
2019-05-28	ND
2019-05-28	ND
2019-08-06	ND
2019-08-20	ND
2019-09-04	ND
2019-10-22	ND