1,1-Dichloroethane

Millis Water Department

1,1-Dichloroethane is used in industrial chemical synthesis; in plastics, paint, varnish and finish removers; and as a pesticide. It can 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	Detections	Range of results
2014	0.0744 ppb	9	1	ND - 0.670 ppb
2015	0.1000 ppb	7	1	ND - 0.700 ppb
2016	0.0950 ppb	8	1	ND - 0.760 ppb
2017	0.286 ppb	10	3	ND - 1.15 ppb
2018	0.0944 ppb	9	1	ND - 0.850 ppb
2019	0.0775 ppb	8	1	ND - 0.620 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 3 ppb

The EWG Health Guideline of 3 ppb for 1,1-dichloroethane 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	Result
2014-02-26	ND
2014-02-26	ND
2014-05-28	ND
2014-05-28	ND
2014-05-28	ND
2014-05-28	0.670 ppb
2014-05-28	ND
2014-08-28	ND
2014-11-25	ND
2015-02-24	ND
2015-05-27	ND
2015-05-27	ND
2015-05-27	0.700 ppb
2015-05-27	ND
2015-09-29	ND
2015-11-24	ND
2016-02-25	ND
2016-06-21	ND
2016-06-21	0.760 ppb
2016-06-21	ND
2016-06-21	ND
2016-06-21	ND
2016-08-30	ND
2016-11-21	ND
2017-02-21	ND
2017-03-13	ND
2017-06-20	ND
2017-06-20	ND
2017-07-20	ND
2017-09-29	ND
2017-09-29	1.15 ppb
2017-10-10	ND
2017-10-13	0.610 ppb
2017-10-13	1.10 ppb
2018-02-27	ND
2018-05-29	ND
2018-05-29	0.850 ppb
2018-05-29	ND
2018-05-29	ND
2018-05-29	ND
2018-05-29	ND
2018-12-11	ND
2018-12-20	ND
2019-02-27	ND
2019-05-30	ND
2019-05-30	ND
2019-05-30	ND
2019-05-30	ND
2019-05-30	0.620 ppb
2019-08-28	ND
2019-12-18	ND