♦ Carcinogen

Dichlorobenzene (mixed isomers)

CAS # 25321-22-6

4,295 lbs total reported releases across all facilities and years.

Facilities listed below reported releases of this chemical to the EPA Toxic Release Inventory (TRI). Quantities are self-reported annual totals in pounds, broken out by release pathway. Click any facility name for its full compliance profile.

National Release Trend (2015–2024) -8% overall

Year	Total Released (lbs)	Reporting Facilities	vs Prior Year
2015	328	12	—
2016	454	8	+38%
2017	363	11	-20%
2018	1,373	11	+278%
2019	84	5	-94%
2020	1,320	7	+1479%
2021	20	8	-99%
2022	16	9	-17%
2023	36	8	+120%
2024	302	10	+747%

Top Releasing Industries

Industry Sector	Total Released (lbs)	Facilities
Manufacturing	4,268	11
Administrative and Support and Waste Management	28	7
Transportation and Warehousing	0	1

Facility	Location	Year	Total (lbs)	Air	Water
HOLCIM (US) INC.	HOLLY HILL, SC	2024	—	—	—
BAYER MATERIALSCIENCE BAYTOWN	BAYTOWN, TX	2024	275	275	—
WESTLAKE US 2 LLC	WESTLAKE, LA	2024	16	16	—
LACC LLC US - ETHYLENE & DERIVATIVES PLANT	WESTLAKE, LA	2024	9	9	—
OCCIDENTAL CHEMICAL OXYCHEM- PORTLAND PLANT	GREGORY, TX	2024	2	2	—
GIANT CEMENT COMPANY	HARLEYVILLE, SC	2024	1	1	—
CLEAN HARBORS EL DORADO LLC	EL DORADO, AR	2024	0	0	—
CLEAN HARBORS DEER PARK LLC	LA PORTE, TX	2024	0	0	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2024	0	0	—
CLEAN HARBORS ARAGONITE LLC	GRANTSVILLE, UT	2024	0	0	—
HOLCIM (US) INC.	HOLLY HILL, SC	2023	—	—	—
WESTLAKE US 2 LLC	WESTLAKE, LA	2023	16	16	—
LACC LLC US - ETHYLENE & DERIVATIVES PLANT	WESTLAKE, LA	2023	10	10	—
BAYER MATERIALSCIENCE BAYTOWN	BAYTOWN, TX	2023	6	6	—
OCCIDENTAL CHEMICAL OXYCHEM- PORTLAND PLANT	GREGORY, TX	2023	3	3	—
GIANT CEMENT COMPANY	HARLEYVILLE, SC	2023	1	1	—
CLEAN HARBORS EL DORADO LLC	EL DORADO, AR	2023	0	0	—
CLEAN HARBORS DEER PARK LLC	LA PORTE, TX	2023	0	0	—
HOLCIM (US) INC.	HOLLY HILL, SC	2022	—	—	—
BAYER MATERIALSCIENCE BAYTOWN	BAYTOWN, TX	2022	—	—	—
WESTLAKE US 2 LLC	WESTLAKE, LA	2022	13	13	—
OCCIDENTAL CHEMICAL OXYCHEM- PORTLAND PLANT	GREGORY, TX	2022	2	2	—
GIANT CEMENT COMPANY	HARLEYVILLE, SC	2022	1	1	—
CLEAN HARBORS DEER PARK LLC	LA PORTE, TX	2022	0	0	—
CLEAN HARBORS EL DORADO LLC	EL DORADO, AR	2022	0	0	—
CLEAN HARBORS ARAGONITE LLC	GRANTSVILLE, UT	2022	0	0	—
ROSS INCINERATION SERVICES (GRAFTON, OH)	GRAFTON, OH	2022	0	0	—
BAYER MATERIALSCIENCE BAYTOWN	BAYTOWN, TX	2021	—	—	—
WESTLAKE US 2 LLC	WESTLAKE, LA	2021	16	16	—
OCCIDENTAL CHEMICAL OXYCHEM- PORTLAND PLANT	GREGORY, TX	2021	3	3	—
GIANT CEMENT COMPANY	HARLEYVILLE, SC	2021	1	1	—
CLEAN HARBORS DEER PARK LLC	LA PORTE, TX	2021	0	0	—
CLEAN HARBORS EL DORADO LLC	EL DORADO, AR	2021	0	0	—
CLEAN HARBORS ARAGONITE LLC	GRANTSVILLE, UT	2021	0	0	—
ROSS INCINERATION SERVICES (GRAFTON, OH)	GRAFTON, OH	2021	0	0	—
BAYER MATERIALSCIENCE BAYTOWN	BAYTOWN, TX	2020	1,257	1,257	—
WESTLAKE US 2 LLC	WESTLAKE, LA	2020	60	60	—
OCCIDENTAL CHEMICAL OXYCHEM- PORTLAND PLANT	GREGORY, TX	2020	2	2	—
GIANT CEMENT COMPANY	HARLEYVILLE, SC	2020	1	1	—
CLEAN HARBORS DEER PARK LLC	LA PORTE, TX	2020	0	0	—
CLEAN HARBORS EL DORADO LLC	EL DORADO, AR	2020	0	0	—
CLEAN HARBORS ARAGONITE LLC	GRANTSVILLE, UT	2020	0	0	—
WESTLAKE US 2 LLC	WESTLAKE, LA	2019	77	77	—
BAYER MATERIALSCIENCE BAYTOWN	BAYTOWN, TX	2019	3	3	—
CHEMTRON CORP	AVON, OH	2019	2	2	—
OCCIDENTAL CHEMICAL OXYCHEM- PORTLAND PLANT	GREGORY, TX	2019	2	2	—
ROSS INCINERATION SERVICES (GRAFTON, OH)	GRAFTON, OH	2019	0	0	—
SELEE CORPORATION	HENDERSONVILLE, NC	2018	—	—	—
JAYHAWK FINE CHEMICALS CORP.	GALENA, KS	2018	—	—	—
BAYER MATERIALSCIENCE BAYTOWN	BAYTOWN, TX	2018	1,302	1,300	2