1,2,4-Trichlorobenzene

Southwest Alabama Water Authority

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
2014	N/A	0	N/A
2015	N/A	0	N/A
2016	ND	5	ND
2017	N/A	0	N/A
2018	ND	9	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
2016-01-12	AB09762	ND
2016-01-13	AB09759	ND
2016-01-13	AB09761	ND
2016-01-13	AB09760	ND
2016-12-19	16L0361-1V	ND
2018-01-10	AB25036	ND
2018-01-10	AB25037	ND
2018-04-09	AB26319	ND
2018-04-09	AB26320	ND
2018-08-07	AB29108	ND
2018-08-07	AB29109	ND
2018-08-07	AB29110	ND
2018-08-07	AB29111	ND
2018-10-11	AB30932	ND
2019-01-14	AB32581	ND
2019-01-14	AB32580	ND
2019-05-13	AB35068	ND
2019-05-13	AB35067	ND
2019-05-13	AB35069	ND
2019-05-13	AB35065	ND
2019-05-13	AB35063	ND
2019-05-13	AB35061	ND
2019-08-12	AB37568	ND
2019-08-12	AB37569	ND
2019-08-12	AB37567	ND
2019-12-11	AB40592	ND
2019-12-11	AB40593	ND