EmissionsLookup
♦ Carcinogen

Isoprene

CAS # 78-79-5

1,337,241 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) +30% overall
Year Total Released (lbs) Reporting Facilities vs Prior Year
2015 121,145 54
2016 117,613 55 -3%
2017 146,833 60 +25%
2018 127,777 59 -13%
2019 82,177 30 -36%
2020 122,943 58 +50%
2021 165,510 61 +35%
2022 140,720 63 -15%
2023 154,575 63 +10%
2024 157,949 63 +2%
Top Releasing Industries
Industry Sector Total Released (lbs) Facilities
Professional, Scientific, and Technical Services 0 1
Manufacturing 1,299,071 68
Administrative and Support and Waste Management 28,474 7
Wholesale Trade 9,696 4
Facility Location Year Total (lbs) Air Water
NOVA CHEMICALS OLEFINS LLC - GEISMAR ETHYLENE PLANT GEISMAR, LA 2024
EXXONMOBIL OIL CORPORATION CHANNAHON, IL 2024
EASTMAN CHEMICAL COMPANY WEST ELIZABETH, PA 2024
CHALMETTE REFINING LLC CHALMETTE, LA 2024
EQUISTAR CHEMICALS, LP - MORRIS PLANT MORRIS, IL 2024
EXXONMOBIL BATON ROUGE REFINERY BATON ROUGE, LA 2024
CHEVRON PHILLIPS CHEMICAL SWEENY OLD OCEAN FACILITIES SWEENY, TX 2024
LACC LLC US - ETHYLENE & DERIVATIVES PLANT WESTLAKE, LA 2024
TESORO LOS ANGELES REFINERY AND CALCINER CARSON, CA 2024
UNION CARBIDE CORP - ST CHARLES PLANT HAHNVILLE, LA 2024
K-SOLV CHANNELVIEW, TX 2024
INDORAMA VENTURES OXIDES - PORT NECHES OPERATIONS PORT NECHES, TX 2024
PORT ARTHUR PLANT PORT ARTHUR, TX 2024
THE GOODYEAR TIRE & RUBBER COMPANY, BEAUMONT CHEMICAL PLANT BEAUMONT, TX 2024 77,483 77,483
LYONDELL CHEMICAL CHANNELVIEW CHANNELVIEW, TX 2024 19,021 19,021
VP RACING FUELS INC SAN ANTONIO, TX 2024 13,894 13,894
DIXIE CHEMICAL COMPANY PASADENA, TX 2024 10,184 10,184
EXXONMOBIL BATON ROUGE CHEMICAL PLANT BATON ROUGE, LA 2024 6,200 6,200
TSRC SPECIALTY MATERIALS LLC - RESEARCH & DEVELOPMENT PILOT PLANT PLAQUEMINE, LA 2024 4,300 4,300
SABINE RIVER OPERATIONS ORANGE, TX 2024 3,005 3,005
KRATON POLYMERS U.S. LLC BELPRE, OH 2024 2,610 2,610
SHELL CHEMICAL DEER PARK, TX 2024 2,376 2,360 16
GALENA PARK GALENA PARK, TX 2024 2,371 2,371
SEPTON COMPANY OF AMERICA PASADENA, TX 2024 2,125 2,125
THE DOW CHEMICAL COMPANY TEXAS OPERATIONS FREEPORT, TX 2024 1,750 1,750
FORMOSA PLASTICS CORPORATION, TEXAS POINT COMFORT, TX 2024 1,538 1,538
CHEVRON PHILLIPS CHEMICAL COMPANY LP - CEDAR BAYOU BAYTOWN, TX 2024 1,515 1,515
BAYTOWN TERMINAL BAYTOWN, TX 2024 1,197 1,197
PORT ALLEN REFINERY PORT ALLEN, LA 2024 1,098 1,097 1
CHEVRON SALT LAKE CITY REFINERY AND MARKETING TERMINAL NORTH SALT LAKE, UT 2024 1,042 1,042
SHELL OPUS PUGET SOUND REFINERY ANACORTES, WA 2024 908 908
LINDAU CHEMICALS INC COLUMBIA, SC 2024 861 861
BAYTOWN OLEFINS PLANT BAYTOWN, TX 2024 736 670 66
EQUISTAR CHEMICALS-LAPORTE LAPORTE, TX 2024 578 578
BP PRODUCTS NORTH AMERICA, INC. WHITING, IN 2024 510 510
KMTEX - PORT ARTHUR FACILITY PORT ARTHUR, TX 2024 508 508
OCCIDENTAL CHEMICAL OXYCHEM- PORTLAND PLANT GREGORY, TX 2024 504 504
EXXONMOBIL BAYTOWN REFINERY BAYTOWN, TX 2024 413 23 390
SYNTHOMER ADHESIVE TEHCNOLOGIES EASTOFLEX AND EAST LONGVIEW, TX 2024 362 362
EXXONMOBIL BEAUMONT REFINERY BEAUMONT, TX 2024 191 191
EQUISTAR CHEMICALS CLINTON, IA 2024 125 125
CHEVRON MM PASCAGOULA PASCAGOULA, MS 2024 120 120
WESTLAKE VINYLS, INC. CALVERT CITY, KY 2024 113 113
THE DOW CHEMICAL COMPANY - LOUISIANA OPERATIONS PLAQUEMINE, LA 2024 73 73
EXXONMOBIL BEAUMONT CHEMICAL PLANT (BMCP) BEAUMONT, TX 2024 58 58
SYSTECH ENVIRONMENTAL FREDONIA, KS 2024 49 49
GULF COAST GROWTH VENTURES LLC GREGORY, TX 2024 27 27
NORCO MANUFACTURING COMPLEX & ASSOCIATED FACILITIES NORCO, LA 2024 20 20
TORRANCE REFINING COMPANY LLC TORRANCE, CA 2024 13 13
CHEVRON REFINERY RICHMOND RICHMOND, CA 2024 12 12