Methacrylonitrile

CAS # 126-98-7

1,289,875 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) -68% overall

Year	Total Released (lbs)	Reporting Facilities	vs Prior Year
2015	189,025	4	—
2016	263,114	6	+39%
2017	263,179	6	0%
2018	40,607	3	-85%
2019	34,010	1	-16%
2020	30,058	4	-12%
2021	128,307	4	+327%
2022	145,022	4	+13%
2023	136,659	5	-6%
2024	59,894	5	-56%

Top Releasing Industries

Industry Sector	Total Released (lbs)	Facilities
Manufacturing	1,246,816	5
Administrative and Support and Waste Management	43,060	4

Facility	Location	Year	Total (lbs)	Air	Water
GREEN BAY - NOURYON USA, LLC.	GREEN BAY, WI	2024	—	—	—
(VEOLIA) ELEMENTAL ENVIRONMENTAL SOLUTIONS LLC - GUM SPRINGS PLANT	ARKADELPHIA, AR	2024	43,047	0	—
ASCEND PERFORMANCE MATERIALS CHOCOLATE BAYOU PLANT	ALVIN, TX	2024	16,764	—	—
INEOS USA LLC	LIMA, OH	2024	83	—	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2024	0	0	—
GREEN BAY - NOURYON USA, LLC.	GREEN BAY, WI	2023	—	—	—
CORNERSTONE CHEMICAL CO LLC	WAGGAMAN, LA	2023	107,455	—	—
ASCEND PERFORMANCE MATERIALS CHOCOLATE BAYOU PLANT	ALVIN, TX	2023	29,125	—	—
INEOS USA LLC	LIMA, OH	2023	79	—	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2023	0	0	—
CORNERSTONE CHEMICAL CO LLC	WAGGAMAN, LA	2022	114,032	0	—
ASCEND PERFORMANCE MATERIALS CHOCOLATE BAYOU PLANT	ALVIN, TX	2022	30,902	—	—
INEOS USA LLC	LIMA, OH	2022	88	—	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2022	0	0	—
CORNERSTONE CHEMICAL CO LLC	WAGGAMAN, LA	2021	92,973	0	—
ASCEND PERFORMANCE MATERIALS CHOCOLATE BAYOU PLANT	ALVIN, TX	2021	35,239	—	—
INEOS USA LLC	LIMA, OH	2021	95	—	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2021	0	0	—
ASCEND PERFORMANCE MATERIALS CHOCOLATE BAYOU PLANT	ALVIN, TX	2020	29,964	1	—
INEOS USA LLC	LIMA, OH	2020	94	—	—
CLEAN HARBORS ARAGONITE LLC	GRANTSVILLE, UT	2020	0	0	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2020	0	0	—
ASCEND PERFORMANCE MATERIALS CHOCOLATE BAYOU PLANT	ALVIN, TX	2019	34,010	1	—
ASCEND PERFORMANCE MATERIALS CHOCOLATE BAYOU PLANT	ALVIN, TX	2018	40,557	1	—
INEOS USA LLC	LIMA, OH	2018	50	—	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2018	0	0	—
MITSUBISHI CHEMICAL AMERICA	MEMPHIS, TN	2017	—	—	—
ASCEND PERFORMANCE MATERIALS CHOCOLATE BAYOU PLANT	ALVIN, TX	2017	263,138	1	—
INEOS USA LLC	LIMA, OH	2017	33	—	—
VEOLIA ES TECHNICAL SOLUTIONS	BEAUMONT, TX	2017	8	8	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2017	0	0	—
CLEAN HARBORS ARAGONITE LLC	GRANTSVILLE, UT	2017	0	0	—
INEOS USA LLC	LIMA, OH	2016	—	—	—
MITSUBISHI CHEMICAL AMERICA	MEMPHIS, TN	2016	—	—	—
ASCEND PERFORMANCE MATERIALS CHOCOLATE BAYOU PLANT	ALVIN, TX	2016	263,110	1	—
CLEAN HARBORS ARAGONITE LLC	GRANTSVILLE, UT	2016	2	2	—
VEOLIA ES TECHNICAL SOLUTIONS	BEAUMONT, TX	2016	2	2	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2016	0	0	—
MITSUBISHI CHEMICAL AMERICA	MEMPHIS, TN	2015	—	—	—
INEOS USA LLC	LIMA, OH	2015	—	—	—
ASCEND PERFORMANCE MATERIALS CHOCOLATE BAYOU PLANT	ALVIN, TX	2015	189,025	1	—
HERITAGE THERMAL SERVICES	EAST LIVERPOOL, OH	2015	0	0	—