1,3-Dichloropropene

Westborough Water Department

1,3-Dichloropropene is a volatile cancer-causing chemical primarily used as a nematocide to fumigate agricultural soils. It exists in two different forms: cis-1,3-dichloropropene and trans-1,3-dichloropropene.

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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	12	ND
2015	ND	13	ND
2016	ND	12	ND
2017	ND	14	ND
2018	ND	16	ND
2019	ND	3	ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.2 ppb

The EWG Health Guideline of 0.2 ppb for 1,3-dichloropropene 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
2014-05-21	ND
2014-05-21	ND
2014-05-21	ND
2014-05-21	ND
2014-05-21	ND
2014-05-21	ND
2014-05-21	ND
2014-05-21	ND
2014-05-21	ND
2014-05-21	ND
2014-06-27	ND
2014-12-16	ND
2015-04-17	ND
2015-05-12	ND
2015-05-12	ND
2015-05-12	ND
2015-06-02	ND
2015-06-02	ND
2015-06-02	ND
2015-06-02	ND
2015-06-02	ND
2015-06-04	ND
2015-06-04	ND
2015-06-04	ND
2015-09-17	ND
2016-05-12	ND
2016-05-12	ND
2016-05-12	ND
2016-05-12	ND
2016-05-13	ND
2016-05-13	ND
2016-05-13	ND
2016-05-25	ND
2016-05-25	ND
2016-05-25	ND
2016-05-25	ND
2016-05-25	ND
2017-05-02	ND
2017-05-02	ND
2017-05-02	ND
2017-05-02	ND
2017-05-02	ND
2017-05-02	ND
2017-05-02	ND
2017-05-16	ND
2017-05-16	ND
2017-05-16	ND
2017-05-16	ND
2017-05-16	ND
2017-08-31	ND
2017-11-14	ND
2018-03-01	ND
2018-06-20	ND
2018-06-20	ND
2018-06-20	ND
2018-06-20	ND
2018-06-20	ND
2018-06-20	ND
2018-06-20	ND
2018-06-20	ND
2018-06-26	ND
2018-06-26	ND
2018-06-26	ND
2018-06-26	ND
2018-06-26	ND
2018-06-26	ND
2018-09-12	ND
2019-07-24	ND
2019-07-24	ND
2019-07-24	ND