1,2,3-Trichloropropane

City of South Houston

1,2,3-Trichloropropane is a potent carcinogen that contaminates drinking water in agricultural regions where it was historically used as soil fumigant. Click here to read more about carcinogenic VOCs.

MORE ABOUT THIS CONTAMINANT

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	5	ND
2015	ND	5	ND
2016	ND	5	ND
2017	ND	10	ND
2018	ND	5	ND
2019	ND	5	ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.0007 ppb

The EWG Health Guideline of 0.0007 ppb for 1,2,3-trichloropropane 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
2014-04-07	AC49480	ND
2014-04-07	AC49492	ND
2014-04-07	AC49486	ND
2014-04-07	AC49482	ND
2014-04-07	AC49502	ND
2015-01-21	AC77095	ND
2015-01-21	AC77101	ND
2015-01-21	AC77093	ND
2015-01-21	AC77099	ND
2015-01-21	AC77109	ND
2016-01-14	AD18215	ND
2016-01-14	AD18219	ND
2016-01-14	AD18221	ND
2016-01-14	AD18205	ND
2016-01-14	AD18207	ND
2017-01-06	AD63659	ND
2017-01-06	AD63617	ND
2017-02-10	AD70432	ND
2017-03-01	AD72837	ND
2017-03-01	AD72833	ND
2017-03-01	AD72835	ND
2017-03-01	AD72753	ND
2017-03-01	AD72765	ND
2017-03-01	AD72763	ND
2017-03-01	AD72785	ND
2018-01-30	AE11273	ND
2018-01-30	AE11277	ND
2018-01-30	AE11275	ND
2018-01-30	AE11281	ND
2018-01-30	AE11279	ND
2019-02-05	AE52937	ND
2019-02-05	AE52939	ND
2019-02-05	AE52913	ND
2019-02-05	AE52915	ND
2019-02-05	AE52943	ND