1,2,3-Trichloropropane

Gonzales County Water Supply Corporation

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	8	ND
2015	ND	5	ND
2016	ND	4	ND
2017	ND	8	ND
2018	ND	4	ND
2019	ND	3	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
2014-02-20	AC43885	ND
2014-02-20	AC43895	ND
2014-02-20	AC43883	ND
2014-02-20	AC43889	ND
2014-02-20	AC43897	ND
2014-02-20	AC43865	ND
2014-06-05	AC56103	ND
2014-09-05	AC66060	ND
2015-02-04	AC79291	ND
2015-02-04	AC79275	ND
2015-02-04	AC79273	ND
2015-02-04	AC79281	ND
2015-07-22	AD00644	ND
2016-01-19	AD18620	ND
2016-01-19	AD18688	ND
2016-01-19	AD18652	ND
2016-09-09	AD49182	ND
2017-03-13	AD75522	ND
2017-03-13	AD75528	ND
2017-03-13	AD75524	ND
2017-03-13	AD75526	ND
2017-03-13	AD75502	ND
2017-03-13	AD75498	ND
2017-03-13	AD75500	ND
2017-04-26	AD81253	ND
2018-02-08	AE13037	ND
2018-03-12	AE17864	ND
2018-03-12	AE17882	ND
2018-03-12	AE17842	ND
2019-01-09	AE49241	ND
2019-01-09	AE49237	ND
2019-03-05	AE57192	ND