1,1-Dichloroethane

Hudson Water Supply

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	0.412 ppb	6	4	ND - 0.760 ppb
2015	0.170 ppb	13	4	ND - 0.870 ppb
2016	0.200 ppb	6	1	ND - 1.20 ppb
2017	ND	5	0	ND
2018	0.127 ppb	6	1	ND - 0.760 ppb
2019	0.247 ppb	7	3	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
2014-06-10	0.580 ppb
2014-06-10	0.520 ppb
2014-06-10	ND
2014-06-10	0.610 ppb
2014-06-10	0.760 ppb
2014-06-10	ND
2015-03-25	ND
2015-04-30	0.390 ppb
2015-06-09	ND
2015-06-09	0.510 ppb
2015-06-09	ND
2015-06-09	0.870 ppb
2015-06-09	ND
2015-06-09	ND
2015-06-09	ND
2015-06-25	ND
2015-09-28	ND
2015-10-27	0.440 ppb
2015-12-23	ND
2016-06-14	ND
2016-06-14	ND
2016-06-14	ND
2016-06-14	1.20 ppb
2016-06-14	ND
2016-06-14	ND
2017-06-20	ND
2017-06-20	ND
2017-06-20	ND
2017-06-20	ND
2017-06-20	ND
2018-06-12	ND
2018-06-12	ND
2018-06-12	ND
2018-06-12	0.760 ppb
2018-06-12	ND
2018-06-12	ND
2019-04-16	ND
2019-04-16	0.550 ppb
2019-04-16	0.620 ppb
2019-04-16	0.560 ppb
2019-04-16	ND
2019-07-19	ND
2019-09-25	ND