Hexachlorocyclopentadiene

CAS # 77-47-4

657 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) -95% overall

Year	Total Released (lbs)	Reporting Facilities	vs Prior Year
2015	325	8	—
2016	230	8	-29%
2017	15	6	-94%
2018	14	5	-7%
2019	1	2	-90%
2020	11	5	+751%
2021	12	6	+4%
2022	16	7	+38%
2023	16	6	+2%
2024	17	5	+3%

Top Releasing Industries

Industry Sector	Total Released (lbs)	Facilities
Manufacturing	657	7
Administrative and Support and Waste Management	0	2

Worst Water Discharge Exceedances Facilities that exceeded their permit limits for this chemical in discharge monitoring reports

Facility	Reported	Limit	Exceedance	Period
VITRO MEADVILLE FLAT GLASS MEADVILLE PLT/CRAWFORD COCHRANTON, PA	0.00 kg/d	0.00	+2,757%	Feb 2020
VITRO MEADVILLE FLAT GLASS MEADVILLE PLT/CRAWFORD COCHRANTON, PA	0.01 kg/d	0.00	+2,757%	Feb 2020
VITRO MEADVILLE FLAT GLASS MEADVILLE PLT/CRAWFORD COCHRANTON, PA	0.00 kg/d	0.00	+2,471%	Jan 2020
VITRO MEADVILLE FLAT GLASS MEADVILLE PLT/CRAWFORD COCHRANTON, PA	0.00 kg/d	0.00	+1,900%	May 2020
VITRO MEADVILLE FLAT GLASS MEADVILLE PLT/CRAWFORD COCHRANTON, PA	0.00 kg/d	0.00	+1,329%	May 2020
VITRO MEADVILLE FLAT GLASS MEADVILLE PLT/CRAWFORD COCHRANTON, PA	0.00 kg/d	0.00	+1,186%	Jan 2020
VITRO MEADVILLE FLAT GLASS MEADVILLE PLT/CRAWFORD COCHRANTON, PA	0.00 kg/d	0.00	+1,043%	Apr 2020
VITRO MEADVILLE FLAT GLASS MEADVILLE PLT/CRAWFORD COCHRANTON, PA	0.00 kg/d	0.00	+757%	Mar 2020
VITRO MEADVILLE FLAT GLASS MEADVILLE PLT/CRAWFORD COCHRANTON, PA	0.00 kg/d	0.00	+471%	Apr 2020
VITRO MEADVILLE FLAT GLASS MEADVILLE PLT/CRAWFORD COCHRANTON, PA	0.00 kg/d	0.00	+471%	Mar 2020
NOGALES INTERNATIONAL WASTEWATER TREATMENT PLANT RIO RICO, AZ	0.00 mg/L	0.00	+220%	Jun 2015
VITRO MEADVILLE FLAT GLASS MEADVILLE PLT/CRAWFORD COCHRANTON, PA	0.00 kg/d	0.00	+186%	Dec 2019
VITRO MEADVILLE FLAT GLASS MEADVILLE PLT/CRAWFORD COCHRANTON, PA	0.00 kg/d	0.00	+157%	Jun 2020
NOGALES INTERNATIONAL WASTEWATER TREATMENT PLANT RIO RICO, AZ	0.04 kg/d	0.02	+154%	Jun 2015
VITRO MEADVILLE FLAT GLASS MEADVILLE PLT/CRAWFORD COCHRANTON, PA	0.01 mg/L	0.00	+137%	Jan 2020
VITRO MEADVILLE FLAT GLASS MEADVILLE PLT/CRAWFORD COCHRANTON, PA	0.01 mg/L	0.00	+133%	Dec 2019
NOGALES INTERNATIONAL WASTEWATER TREATMENT PLANT RIO RICO, AZ	0.00 mg/L	0.00	+116%	Mar 2015
NOGALES INTERNATIONAL WASTEWATER TREATMENT PLANT RIO RICO, AZ	0.00 mg/L	0.00	+116%	Mar 2015
NOGALES INTERNATIONAL WASTEWATER TREATMENT PLANT RIO RICO, AZ	0.00 mg/L	0.00	+112%	Dec 2015
NOGALES INTERNATIONAL WASTEWATER TREATMENT PLANT RIO RICO, AZ	0.00 mg/L	0.00	+112%	Sep 2015

Facility	Location	Year	Total (lbs)	Air	Water
HEIDELBERG MATERIALS CEMENT COMPANY LLC	LOGANSPORT, IN	2024	—	—	—
METTON AMERICA LA PORTE PLANT	LA PORTE, TX	2024	15	10	5
DDP SPECIALTY ELECTRONIC MATERIALS US 5, LLC (0868090072)	WEST ALEXANDRIA, OH	2024	2	2	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2024	0	0	—
WESTLAKE US 2 LLC	WESTLAKE, LA	2024	0	0	—
BLUE CUBE OPERATIONS LLC	PLAQUEMINE, LA	2023	—	—	—
HEIDELBERG MATERIALS CEMENT COMPANY LLC	LOGANSPORT, IN	2023	—	—	—
METTON AMERICA LA PORTE PLANT	LA PORTE, TX	2023	15	10	5
DDP SPECIALTY ELECTRONIC MATERIALS US 5, LLC (0868090072)	WEST ALEXANDRIA, OH	2023	1	1	—
WESTLAKE US 2 LLC	WESTLAKE, LA	2023	0	0	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2023	0	0	—
BLUE CUBE OPERATIONS LLC	PLAQUEMINE, LA	2022	—	—	—
HEIDELBERG MATERIALS CEMENT COMPANY LLC	LOGANSPORT, IN	2022	—	—	—
METTON AMERICA LA PORTE PLANT	LA PORTE, TX	2022	15	10	5
DDP SPECIALTY ELECTRONIC MATERIALS US 5, LLC (0868090072)	WEST ALEXANDRIA, OH	2022	1	1	—
WESTLAKE US 2 LLC	WESTLAKE, LA	2022	0	0	—
ARCWOOD ENVIRONMENTAL, LLC	ORANGE, TX	2022	0	0	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2022	0	0	—
BLUE CUBE OPERATIONS LLC	PLAQUEMINE, LA	2021	—	—	—
HEIDELBERG MATERIALS CEMENT COMPANY LLC	LOGANSPORT, IN	2021	—	—	—
METTON AMERICA LA PORTE PLANT	LA PORTE, TX	2021	10	10	0
DDP SPECIALTY ELECTRONIC MATERIALS US 5, LLC (0868090072)	WEST ALEXANDRIA, OH	2021	2	2	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2021	0	0	—
WESTLAKE US 2 LLC	WESTLAKE, LA	2021	0	0	—
BLUE CUBE OPERATIONS LLC	PLAQUEMINE, LA	2020	—	—	—
HEIDELBERG MATERIALS CEMENT COMPANY LLC	LOGANSPORT, IN	2020	—	—	—
METTON AMERICA LA PORTE PLANT	LA PORTE, TX	2020	10	10	0
DDP SPECIALTY ELECTRONIC MATERIALS US 5, LLC (0868090072)	WEST ALEXANDRIA, OH	2020	1	1	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2020	0	0	—
DDP SPECIALTY ELECTRONIC MATERIALS US 5, LLC (0868090072)	WEST ALEXANDRIA, OH	2019	1	1	—
WESTLAKE US 2 LLC	WESTLAKE, LA	2019	0	0	—
WESTLAKE US 2 LLC	WESTLAKE, LA	2018	—	—	—
HEIDELBERG MATERIALS CEMENT COMPANY LLC	LOGANSPORT, IN	2018	—	—	—
BLUE CUBE OPERATIONS LLC	PLAQUEMINE, LA	2018	—	—	—
METTON AMERICA LA PORTE PLANT	LA PORTE, TX	2018	12	10	2
DDP SPECIALTY ELECTRONIC MATERIALS US 5, LLC (0868090072)	WEST ALEXANDRIA, OH	2018	2	2	—
WESTLAKE US 2 LLC	WESTLAKE, LA	2017	—	—	—
THE DOW CHEMICAL COMPANY - LOUISIANA OPERATIONS	PLAQUEMINE, LA	2017	—	—	—
HEIDELBERG MATERIALS CEMENT COMPANY LLC	LOGANSPORT, IN	2017	—	—	—
METTON AMERICA LA PORTE PLANT	LA PORTE, TX	2017	12	10	2
DDP SPECIALTY ELECTRONIC MATERIALS US 5, LLC (0868090072)	WEST ALEXANDRIA, OH	2017	2	2	—
BLUE CUBE OPERATIONS LLC	PLAQUEMINE, LA	2017	1	1	—
HEIDELBERG MATERIALS CEMENT COMPANY LLC	LOGANSPORT, IN	2016	—	—	—
BLUE CUBE OPERATIONS LLC	PLAQUEMINE, LA	2016	—	—	—
THE DOW CHEMICAL COMPANY - LOUISIANA OPERATIONS	PLAQUEMINE, LA	2016	—	—	—
WESTLAKE US 2 LLC	WESTLAKE, LA	2016	—	—	—
OCCIDENTAL CHEMICAL CORP.	NIAGARA FALLS, NY	2016	213	212	1
METTON AMERICA LA PORTE PLANT	LA PORTE, TX	2016	15	10	5
DDP SPECIALTY ELECTRONIC MATERIALS US 5, LLC (0868090072)	WEST ALEXANDRIA, OH	2016	2	2	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2016	0	0	—