1,4-Dichloro-2-butene

CAS # 764-41-0

62,591 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) +61% overall

Year	Total Released (lbs)	Reporting Facilities	vs Prior Year
2015	5,168	5	—
2016	2,767	4	-46%
2017	8,514	4	+208%
2018	9,479	4	+11%
2019	5,331	1	-44%
2020	5,155	4	-3%
2021	5,713	4	+11%
2022	6,282	4	+10%
2023	5,864	4	-7%
2024	8,317	4	+42%

Top Releasing Industries

Industry Sector	Total Released (lbs)	Facilities
Manufacturing	62,591	4
Administrative and Support and Waste Management	0	1

Facility	Location	Year	Total (lbs)	Air	Water
WESTLAKE CHEMICALS & VINYLS LLC - PLAQUEMINE FACILITY	PLAQUEMINE, LA	2024	—	—	—
DENKA PERFORMANCE ELASTOMER LLC	LAPLACE, LA	2024	8,316	2,103	4
WESTLAKE CHEMICALS & VINYLS LLC	WESTLAKE, LA	2024	1	1	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2024	0	0	—
WESTLAKE CHEMICALS & VINYLS LLC - PLAQUEMINE FACILITY	PLAQUEMINE, LA	2023	—	—	—
DENKA PERFORMANCE ELASTOMER LLC	LAPLACE, LA	2023	5,863	2,383	1
WESTLAKE CHEMICALS & VINYLS LLC	WESTLAKE, LA	2023	1	1	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2023	0	0	—
WESTLAKE CHEMICALS & VINYLS LLC - PLAQUEMINE FACILITY	PLAQUEMINE, LA	2022	—	—	—
DENKA PERFORMANCE ELASTOMER LLC	LAPLACE, LA	2022	6,281	2,270	102
WESTLAKE CHEMICALS & VINYLS LLC	WESTLAKE, LA	2022	1	1	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2022	0	0	—
WESTLAKE CHEMICALS & VINYLS LLC - PLAQUEMINE FACILITY	PLAQUEMINE, LA	2021	—	—	—
DENKA PERFORMANCE ELASTOMER LLC	LAPLACE, LA	2021	5,712	2,444	98
WESTLAKE CHEMICALS & VINYLS LLC	WESTLAKE, LA	2021	1	1	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2021	0	0	—
WESTLAKE CHEMICALS & VINYLS LLC - PLAQUEMINE FACILITY	PLAQUEMINE, LA	2020	—	—	—
DENKA PERFORMANCE ELASTOMER LLC	LAPLACE, LA	2020	5,154	2,321	96
WESTLAKE CHEMICALS & VINYLS LLC	WESTLAKE, LA	2020	1	1	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2020	0	0	—
DENKA PERFORMANCE ELASTOMER LLC	LAPLACE, LA	2019	5,331	2,037	51
WESTLAKE CHEMICALS & VINYLS LLC - PLAQUEMINE FACILITY	PLAQUEMINE, LA	2018	—	—	—
DENKA PERFORMANCE ELASTOMER LLC	LAPLACE, LA	2018	9,478	1,925	53
WESTLAKE CHEMICALS & VINYLS LLC	WESTLAKE, LA	2018	1	1	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2018	0	0	—
WESTLAKE CHEMICALS & VINYLS LLC - PLAQUEMINE FACILITY	PLAQUEMINE, LA	2017	—	—	—
DENKA PERFORMANCE ELASTOMER LLC	LAPLACE, LA	2017	8,513	2,990	23
WESTLAKE CHEMICALS & VINYLS LLC	WESTLAKE, LA	2017	1	1	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2017	0	0	—
WESTLAKE CHEMICALS & VINYLS LLC - PLAQUEMINE FACILITY	PLAQUEMINE, LA	2016	—	—	—
DENKA PERFORMANCE ELASTOMER LLC	LAPLACE, LA	2016	2,765	2,649	22
WESTLAKE CHEMICALS & VINYLS LLC	WESTLAKE, LA	2016	2	2	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2016	0	0	—
WESTLAKE CHEMICALS & VINYLS LLC - PLAQUEMINE FACILITY	PLAQUEMINE, LA	2015	—	—	—
DUPONT PONTCHARTRAIN SITE	LA PLACE, LA	2015	4,973	654	19
DENKA PERFORMANCE ELASTOMER LLC	LAPLACE, LA	2015	194	181	3
WESTLAKE CHEMICALS & VINYLS LLC	WESTLAKE, LA	2015	1	1	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2015	0	0	0