1,2,4-Trichlorobenzene

City of Loma Linda

1,2,4-Trichlorobenzene is an industrial solvent that can harm the adrenal glands and may increase the risk of cancer.

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2013	N/A	0	N/A
2014	ND	4	ND
2015	ND	2	ND
2016	ND	8	ND
2017	N/A	0	N/A
2018	ND	7	ND
2019	ND	4	ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 5 ppb

The EWG Health Guideline of 5 ppb for 1,2,4-trichlorobenzene 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 hormone disruption.

EPA Maximum Contaminant
Level (MCL) 70 ppb

The legal limit for 1,2,4-trichlorobenzene, established in 1992, was based on a toxicity study in laboratory animals conducted in 1981. This limit may not fully protect against hormone disruption.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-02-05	3761-024-1020	ND
2014-03-04	3761-018-1430	ND
2014-04-02	3761-032-1015	ND
2014-04-02	3761-030-1440	ND
2015-06-30	3761-032-1050	ND
2015-06-30	3761-030-1025	ND
2016-04-05	3761-014-0940	ND
2016-04-05	3761-017-0645	ND
2016-04-05	3761-030-0710	ND
2016-04-05	3761-031-1020	ND
2016-05-04	3761-014-0750	ND
2016-05-04	3761-031-0720	ND
2016-05-04	3761-017-0710	ND
2016-06-09	3761-032-1030	ND
2018-09-05	3761-031-1335	ND
2018-09-05	3761-018-1405	ND
2018-09-05	3761-017-0830	ND
2018-09-05	3761-014-1315	ND
2018-09-06	3761-030-0900	ND
2018-09-06	3761-032-1230	ND
2018-09-18	3761-024-1040	ND
2019-05-02	3761-033-0730	ND
2019-05-14	3761-014-1340	ND
2019-12-19	3761-030-0845	ND
2019-12-19	3761-032-0910	ND