1,1,2,2-Tetrachloroethane

California Water Service (CWS) - Selma

1,1,2,2-Tetrachloroethane is an industrial chemical which has been used as a metal degreaser, and in paint, paint removers, mothballs and pesticides. It damages the liver and nervous system, and may cause cancer.

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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	4	ND
2015	ND	2	ND
2016	ND	6	ND
2017	ND	4	ND
2018	ND	2	ND
2019	ND	7	ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for 1,1,2,2-tetrachloroethane was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-02-19	5701-038-1330	ND
2014-04-16	5701-013-0926	ND
2014-04-16	5701-005-0908	ND
2014-10-21	5701-014-1053	ND
2015-01-27	5701-021-0959	ND
2015-10-20	9590-004-1110	ND
2016-04-19	5701-023-0956	ND
2016-04-19	5701-018-1020	ND
2016-07-26	5701-001-0914	ND
2016-07-26	5701-022-0941	ND
2016-09-27	5701-036-1010	ND
2016-11-09	5701-010-1030	ND
2017-03-07	5810-038-1041	ND
2017-04-11	5701-005-1030	ND
2017-04-11	5701-013-1046	ND
2017-10-24	5701-014-1122	ND
2018-01-23	5701-021-0908	ND
2018-10-16	5810-004-0947	ND
2019-04-23	5701-018-1100	ND
2019-04-23	5701-023-1046	ND
2019-07-17	5701-022-0943	ND
2019-10-08	5701-018-1105	ND
2019-10-08	5701-023-1048	ND
2019-10-17	5701-010-1051	ND
2019-10-21	5701-036-1030	ND