1,2,4-Trichlorobenzene

Horsham Water&sewer Authority

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

106

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	23	ND
2015	ND	24	ND
2016	ND	22	ND
2017	ND	16	ND
2018	ND	8	ND
2019	ND	13	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
2014-01-09	AE19948	ND
2014-01-09	AE19956	ND
2014-01-09	AE19959	ND
2014-01-24	AE21287	ND
2014-02-19	AE24091	ND
2014-02-19	AE24093	ND
2014-02-19	AE24094	ND
2014-02-19	AE24099	ND
2014-02-19	AE24100	ND
2014-02-20	AE24092	ND
2014-04-16	AE29642	ND
2014-04-16	AE29643	ND
2014-04-16	AE29635	ND
2014-04-16	AE29638	ND
2014-04-16	AE29639	ND
2014-07-23	AE41288	ND
2014-07-23	AE41289	ND
2014-08-13	AE43999	ND
2014-08-13	AE44001	ND
2014-08-13	AE44009	ND
2014-10-08	AE51808	ND
2014-10-09	AE51797	ND
2014-10-09	AE51805	ND
2015-01-16	12286566	ND
2015-01-16	12286601	ND
2015-01-16	12286625	ND
2015-03-04	12514927	ND
2015-03-04	12514948	ND
2015-03-04	12514969	ND
2015-03-04	12514990	ND
2015-03-04	12515011	ND
2015-03-04	12515032	ND
2015-03-04	12515053	ND
2015-03-04	12515074	ND
2015-03-04	12515095	ND
2015-04-16	12632979	ND
2015-04-16	12633021	ND
2015-04-16	12633042	ND
2015-04-23	12633000	ND
2015-07-15	13012131	ND
2015-07-15	13012173	ND
2015-07-17	13012110	ND
2015-07-17	13012152	ND
2015-10-13	13388704	ND
2015-10-14	13388641	ND
2015-10-14	13388662	ND
2015-10-14	13388683	ND
2016-01-12	13752666	ND
2016-01-12	13752687	ND
2016-01-12	13752708	ND
2016-02-16	13869788	ND
2016-03-16	13985432	ND
2016-03-16	13985453	ND
2016-03-16	13985510	ND
2016-03-16	13985516	ND
2016-03-16	13985537	ND
2016-03-16	13985558	ND
2016-03-17	13985411	ND
2016-03-17	13985474	ND
2016-04-26	14102735	ND
2016-05-17	14250249	ND
2016-05-17	14250270	ND
2016-05-17	14250291	ND
2016-07-19	14569327	ND
2016-07-19	14569348	ND
2016-07-19	14569369	ND
2016-10-26	15075509	ND
2016-10-26	15075530	ND
2016-10-26	15075551	ND
2017-01-05	15517112	ND
2017-01-05	15517070	ND
2017-01-25	15517091	ND
2017-02-14	15655259	ND
2017-02-14	15655280	ND
2017-02-14	15655301	ND
2017-02-14	15655238	ND
2017-03-30	15795460	ND
2017-04-05	15936809	ND
2017-04-05	15936830	ND
2017-04-05	15936851	ND
2017-04-18	15936788	ND
2017-08-09	16565736	ND
2017-08-16	16565694	ND
2017-08-16	16565715	ND
2017-10-10	16880005	ND
2018-01-30	AF74814	ND
2018-01-30	AF74813	ND
2018-02-13	AF75932	ND
2018-03-23	AF79016	ND
2018-06-22	AF86999	ND
2018-08-30	AF94269	ND
2018-10-03	AF96985	ND
2018-12-27	AG04620	ND
2019-02-11	AG07771	ND
2019-02-11	AG07772	ND
2019-02-11	AG07773	ND
2019-02-11	AG07775	ND
2019-02-27	AG09179	ND
2019-04-11	AG13046	ND
2019-04-11	AG13047	ND
2019-05-09	AG16016	ND
2019-05-09	AG16019	ND
2019-05-23	AG16891	ND
2019-08-21	AG28299	ND
2019-09-18	AG31924	ND
2019-09-18	AG31925	ND