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 —