Methyl tert-butyl ether
CAS # 1634-04-4
5,323,412 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)
-89% overall
| Year | Total Released (lbs) | Reporting Facilities | vs Prior Year |
|---|---|---|---|
| 2015 | 1,858,579 | 148 | — |
| 2016 | 1,726,073 | 144 | -7% |
| 2017 | 230,269 | 141 | -87% |
| 2018 | 219,611 | 135 | -5% |
| 2019 | 192,505 | 70 | -12% |
| 2020 | 233,030 | 129 | +21% |
| 2021 | 244,710 | 130 | +5% |
| 2022 | 215,310 | 130 | -12% |
| 2023 | 203,486 | 121 | -5% |
| 2024 | 199,839 | 109 | -2% |
Top Releasing Industries
| Industry Sector | Total Released (lbs) | Facilities |
|---|---|---|
| Administrative and Support and Waste Management | 3,480,522 | 24 |
| Manufacturing | 1,666,581 | 102 |
| Wholesale Trade | 136,716 | 94 |
| Professional, Scientific, and Technical Services | 20,379 | 2 |
| Utilities | 7,973 | 1 |
| Transportation and Warehousing | 7,070 | 1 |
| Mining, Quarrying, and Oil and Gas Extraction | 2,552 | 4 |
| Public Administration | 683 | 3 |
Worst Water Discharge Exceedances
Facilities that exceeded their permit limits for this chemical in discharge monitoring reports
| Facility | Reported | Limit | Exceedance | Period |
|---|---|---|---|---|
|
TRES AMIGOS CONVENIENCE STORE
COLEMAN, TX
|
0.01 mg/L | 0.15 | +99,999% | Nov 2016 |
|
TRES AMIGOS CONVENIENCE STORE
COLEMAN, TX
|
0.01 mg/L | 0.15 | +99,999% | Nov 2016 |
|
SALT LAKE INTERNATIONAL AIRPORT
SALT LAKE CITY, UT
|
2.00 mg/L | 0.20 | +900% | Mar 2016 |
|
SALT LAKE INTERNATIONAL AIRPORT
SALT LAKE CITY, UT
|
2.00 mg/L | 0.20 | +900% | Apr 2016 |
|
TRIDENT LOGISTICS CENTER
REVERE, MA
|
0.15 mg/L | 0.02 | +650% | Jan 2026 |
|
TERRIBLE HERBST # 225
LAS VEGAS, NV
|
0.12 mg/L | 0.02 | +500% | Jun 2017 |
|
REBEL STATION #8
LAS VEGAS, NV
|
0.10 mg/L | 0.02 | +400% | Jun 2024 |
|
CENTRAL DENVER RECREATION CENTER
DENVER, CO
|
0.10 mg/L | 0.02 | +393% | Mar 2016 |
|
TRIDENT LOGISTICS CENTER
REVERE, MA
|
0.09 mg/L | 0.02 | +350% | Dec 2025 |
|
COLONIAL PIPELINE COMPANY
GREENSBORO, NC
|
0.08 mg/L | 0.02 | +312% | Feb 2023 |
|
TRIDENT LOGISTICS CENTER
REVERE, MA
|
0.08 mg/L | 0.02 | +300% | Nov 2025 |
|
THE WATERHOLE
OVERTON, NV
|
0.05 mg/L | 0.02 | +145% | Mar 2018 |
|
COLONIAL PIPELINE COMPANY
GREENSBORO, NC
|
0.05 mg/L | 0.02 | +137% | Feb 2022 |
|
TRIDENT LOGISTICS CENTER
REVERE, MA
|
0.15 mg/L | 0.07 | +114% | Jan 2026 |
|
DANSVILLE TRAVEL CENTER
DANSVILLE, NY
|
0.01 mg/L | 0.01 | +100% | Jun 2021 |
|
DANSVILLE TRAVEL CENTER
DANSVILLE, NY
|
0.01 mg/L | 0.01 | +100% | Aug 2021 |
|
DANSVILLE TRAVEL CENTER
DANSVILLE, NY
|
0.01 mg/L | 0.01 | +100% | May 2021 |
|
PORT AUTHORITY OF NY & NJ - JFK INTERNATIONAL AIRPORT
JAMAICA, NY
|
0.10 mg/L | 0.05 | +100% | Mar 2016 |
|
DANSVILLE TRAVEL CENTER
DANSVILLE, NY
|
0.01 mg/L | 0.01 | +100% | Jul 2021 |
|
VELVIN OIL
HENDERSON, TX
|
0.27 mg/L | 0.15 | +78% | Oct 2019 |
| Facility | Location | Year | Total (lbs) | Air | Water |
|---|---|---|---|---|---|
| BASF AGRICULTURAL SOLUTIONS US LLC, BEAUMONT PLANT | BEAUMONT, TX | 2021 | 11,005 | — | — |
| CORDENPHARMA COLORADO, INC. | BOULDER, CO | 2021 | 6,200 | 6,200 | — |
| CAMBREX CHARLES CITY, INC | CHARLES CITY, IA | 2021 | 5,950 | 5,940 | 10 |
| BAYER CROPSCIENCE - KANSAS CITY FACILITY | KANSAS CITY, MO | 2021 | 5,530 | 2,030 | 3,500 |
| ALCAMI CORP (FORMERLY CAMBRIDGE MAJOR LABORATORIES) | GERMANTOWN, WI | 2021 | 4,974 | 4,974 | — |
| MONUMENT CHEMICAL LLC - HOUSTON FACILITY | HOUSTON, TX | 2021 | 4,187 | 4,142 | 45 |
| HENKEL US OPERATIONS CORPORATION | SALISBURY, NC | 2021 | 3,572 | 3,572 | — |
| PENN SPECIALTY CHEMICALS INC | MEMPHIS, TN | 2021 | 3,558 | 3,558 | — |
| CARGILL - VITAMIN E | EDDYVILLE, IA | 2021 | 3,548 | 3,548 | — |
| JAYHAWK FINE CHEMICALS CORP. | GALENA, KS | 2021 | 2,699 | 2,699 | — |
| ALDRICH CHEMICAL CO LLC - SHEBOYGAN FALLS FACILITY | SHEBOYGAN FALLS, WI | 2021 | 2,699 | 2,699 | — |
| SUPERIOR OIL COMPANY, INC. | INDIANAPOLIS, IN | 2021 | 2,678 | 2,678 | — |
| EXXONMOBIL BATON ROUGE CHEMICAL PLANT | BATON ROUGE, LA | 2021 | 2,599 | 2,520 | 79 |
| CURIA GLOBAL | SPRINGFIELD, MO | 2021 | 2,277 | 2,277 | — |
| SCOTT PETROLEUM | GREENWOOD, MS | 2021 | 1,965 | 1,965 | — |
| PUMA ENERGY PUERTO RICO INC | GUAYNABO, PR | 2021 | 1,549 | 1,549 | — |
| LACAMAS LABORATORIES, INC. | ALBANY, OR | 2021 | 1,530 | 1,530 | — |
| AMPAC FINE CHEMICALS LLC | RANCHO CORDOVA, CA | 2021 | 1,504 | 1,504 | — |
| EVONIK DEGUSSA CORP TIPPECANOE LABORATORIES | LAFAYETTE, IN | 2021 | 1,480 | 1,480 | — |
| SUPERIOR OIL COMPANY, INC. | OLD HICKORY, TN | 2021 | 1,469 | 1,469 | — |
| VP RACING FUELS INC. | TERRE HAUTE, IN | 2021 | 1,327 | 1,327 | — |
| K-SOLV | CHANNELVIEW, TX | 2021 | 1,152 | 1,152 | — |
| EXXONMOBIL BATON ROUGE REFINERY | BATON ROUGE, LA | 2021 | 1,110 | 1,110 | — |
| IAH FUEL BULK FUEL STORAGE FACILITY | HOUSTON, TX | 2021 | 1,000 | 1,000 | — |
| OCEAN POINT TERMINALS (FKA LIMETREE) | CHRISTIANSTED, VI | 2021 | 999 | 999 | — |
| SHELL PUERTO RICO TERMINAL SAIPAN | SAIPAN, MP | 2021 | 803 | 803 | — |
| VERMEER CORPORATION | PELLA, IA | 2021 | 800 | 800 | — |
| ROCHE CAROLINA INCORPORATED | FLORENCE, SC | 2021 | 754 | 754 | — |
| SUTERRA LLC | BEND, OR | 2021 | 749 | 749 | — |
| PATHEON WEST FLORENCE (WAS IRIX PHARMACEUTICALS) | FLORENCE, SC | 2021 | 687 | 687 | — |
| CLEAN HARBORS ENVIRONMENTAL SERVICES INC | KIMBALL, NE | 2021 | 680 | 680 | — |
| ABBOTT LABORATORIES - N. CHICAGO FAC. | NORTH CHICAGO, IL | 2021 | 669 | 669 | — |
| FARMERS OIL CORP INC | NEWPORT, AR | 2021 | 664 | 664 | — |
| AIR BP FUELING OPERATIONS INTERNATIONAL AIRPORT DULLES | STERLING, VA | 2021 | 637 | 637 | — |
| KMTEX - PORT ARTHUR FACILITY | PORT ARTHUR, TX | 2021 | 531 | 531 | — |
| SUN COAST RESOURCES | FREEPORT, TX | 2021 | 514 | 514 | — |
| NISSAN NA INC | DECHERD, TN | 2021 | 507 | 507 | — |
| CEDARBURG PHARMACEUTICALS INC | GRAFTON, WI | 2021 | 504 | 504 | — |
| SYSTECH ENVIRONMENTAL | FREDONIA, KS | 2021 | 500 | 500 | — |
| AMERICAN WOODMARK - KINGMAN PLANT | KINGMAN, AZ | 2021 | 437 | 437 | — |
| TOTAL GUAYNABO BULK TERMINAL | GUAYNABO, PR | 2021 | 379 | 379 | — |
| SUN COAST RESOURCES | HOUSTON, TX | 2021 | 373 | 373 | — |
| GREENCASTLE WDF FACILITY - BUZZI UNICEM USA | GREENCASTLE, IN | 2021 | 357 | 357 | — |
| POLYPEPTIDE LABORATORIES INC. | TORRANCE, CA | 2021 | 328 | 328 | — |
| 3M CHEMICAL OPERATIONS' COTTAGE GROVE FACILITY | COTTAGE GROVE, MN | 2021 | 316 | 312 | 4 |
| SUN COAST RESOURCES PECOS | PECOS, TX | 2021 | 278 | 278 | — |
| WESTLAKE PETROCHEMICAL LP | SULPHUR, LA | 2021 | 270 | 270 | — |
| NORTH REGIONAL TREATMENT PLANT | BEAUMONT, TX | 2021 | 265 | 225 | 40 |
| ASHLAND DISTRIBUTION CO | GARLAND, TX | 2021 | 255 | 255 | — |
| SUPERIOR SOLVENTS AND CHEMICALS - SPRINGFIELD FACILITY | SPRINGFIELD, MO | 2021 | 250 | 250 | — |