1,1-Dichloroethane

Grafton Water District

1,1-Dichloroethane is used in industrial chemical synthesis; in plastics, paint, varnish and finish removers; and as a pesticide. It can cause cancer.

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	1.11 ppb	9	1	ND - 10.00 ppb
2015	0.525 ppb	16	1	ND - 8.40 ppb
2016	0.744 ppb	9	1	ND - 6.70 ppb
2017	1.13 ppb	9	2	ND - 7.30 ppb
2018	0.416 ppb	9	1	ND - 3.74 ppb
2019	ND	12	0	ND

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
2014-01-29	ND
2014-04-07	ND
2014-05-12	ND
2014-05-12	ND
2014-05-12	ND
2014-05-12	10.00 ppb
2014-05-12	ND
2014-07-15	ND
2014-11-03	ND
2015-01-21	ND
2015-03-16	ND
2015-03-16	ND
2015-03-16	ND
2015-04-14	ND
2015-04-14	ND
2015-04-14	8.40 ppb
2015-04-14	ND
2015-04-14	ND
2015-04-27	ND
2015-07-14	ND
2015-09-22	ND
2015-09-22	ND
2015-09-22	ND
2015-10-21	ND
2015-11-09	ND
2016-02-02	ND
2016-04-14	ND
2016-04-14	ND
2016-04-14	6.70 ppb
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	7.30 ppb
2017-05-03	ND
2017-05-03	ND
2017-05-03	2.87 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	ND
2018-04-19	3.74 ppb
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