♦ Carcinogen
Propylene oxide
CAS # 75-56-9
3,250,664 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)
-9% overall
| Year | Total Released (lbs) | Reporting Facilities | vs Prior Year |
|---|---|---|---|
| 2015 | 360,657 | 100 | — |
| 2016 | 323,553 | 97 | -10% |
| 2017 | 380,238 | 95 | +18% |
| 2018 | 344,183 | 93 | -9% |
| 2019 | 171,459 | 44 | -50% |
| 2020 | 336,516 | 93 | +96% |
| 2021 | 318,930 | 90 | -5% |
| 2022 | 315,742 | 94 | -1% |
| 2023 | 371,314 | 93 | +18% |
| 2024 | 328,071 | 94 | -12% |
Top Releasing Industries
| Industry Sector | Total Released (lbs) | Facilities |
|---|---|---|
| Manufacturing | 3,176,537 | 110 |
| Administrative and Support and Waste Management | 39,839 | 6 |
| Agriculture, Forestry, Fishing and Hunting | 33,391 | 1 |
| Wholesale Trade | 897 | 2 |
Worst Water Discharge Exceedances
Facilities that exceeded their permit limits for this chemical in discharge monitoring reports
| Facility | Reported | Limit | Exceedance | Period |
|---|---|---|---|---|
|
CELANESE POLYMER PRODUCTS LLC
WASHINGTON, WV
|
0.05 kg/d | 0.00 | +16,656% | Nov 2024 |
|
CELANESE POLYMER PRODUCTS LLC
WASHINGTON, WV
|
0.01 kg/d | 0.00 | +9,688% | Nov 2024 |
|
CELANESE POLYMER PRODUCTS LLC
WASHINGTON, WV
|
0.01 kg/d | 0.00 | +2,222% | Oct 2024 |
|
CELANESE POLYMER PRODUCTS LLC
WASHINGTON, WV
|
0.00 kg/d | 0.00 | +1,132% | Oct 2024 |
|
CELANESE POLYMER PRODUCTS LLC
WASHINGTON, WV
|
0.00 kg/d | 0.00 | +574% | Jan 2025 |
|
CELANESE POLYMER PRODUCTS LLC
WASHINGTON, WV
|
0.00 mg/L | 0.00 | +420% | Jul 2025 |
|
CELANESE POLYMER PRODUCTS LLC
WASHINGTON, WV
|
0.00 kg/d | 0.00 | +227% | Jan 2025 |
|
CELANESE POLYMER PRODUCTS LLC
WASHINGTON, WV
|
0.00 kg/d | 0.00 | +225% | Dec 2024 |
|
CELANESE POLYMER PRODUCTS LLC
WASHINGTON, WV
|
0.00 kg/d | 0.00 | +126% | Dec 2024 |
|
CELANESE POLYMER PRODUCTS LLC
WASHINGTON, WV
|
0.00 mg/L | 0.00 | +115% | Jul 2025 |
|
CELANESE POLYMER PRODUCTS LLC
WASHINGTON, WV
|
0.00 kg/d | 0.00 | +94% | Jul 2025 |
| Facility | Location | Year | Total (lbs) | Air | Water |
|---|---|---|---|---|---|
| US CHEMICAL | WATERTOWN, WI | 2024 | — | — | — |
| INEOS OXIDE - A DIVISION OF INEOS AMERICAS LLC | PLAQUEMINE, LA | 2024 | — | — | — |
| GRAIN PROCESSING CORPORATION | MUSCATINE, IA | 2024 | — | — | — |
| DIVERSEY INC. - FLORENCE | FLORENCE, KY | 2024 | — | — | — |
| RHO CHEMICALS CO | JOLIET, IL | 2024 | — | — | — |
| ELE CORPORATION | MCCOOK, IL | 2024 | — | — | — |
| LINDAU CHEMICALS INC | COLUMBIA, SC | 2024 | — | — | — |
| SOUTHWEST DISTRIBUTING CO | MESA, AZ | 2024 | — | — | — |
| LYONDELL CHEMICAL CHANNELVIEW | CHANNELVIEW, TX | 2024 | 94,712 | 84,847 | — |
| CARGILL, INC. | CEDAR RAPIDS, IA | 2024 | 50,863 | 50,863 | — |
| TATE & LYLE SAGAMORE | LAFAYETTE, IN | 2024 | 32,554 | 32,554 | — |
| NALCO CHAMPION | FREEPORT, TX | 2024 | 16,980 | 16,980 | — |
| LYONDELL CHEMICAL - BAYPORT PLANT | PASADENA, TX | 2024 | 15,147 | 15,147 | — |
| BASF CORP - GEISMAR SITE | GEISMAR, LA | 2024 | 12,470 | 12,470 | — |
| INGREDION INCORPORATED | INDIANAPOLIS, IN | 2024 | 12,174 | 12,174 | — |
| INDORAMA VENTURES OXIDES - PORT NECHES OPERATIONS | PORT NECHES, TX | 2024 | 11,647 | 11,647 | — |
| THE DOW CHEMICAL COMPANY TEXAS OPERATIONS | FREEPORT, TX | 2024 | 10,251 | 9,556 | 695 |
| INGREDION, INC NORTH KANSAS CITY | NORTH KANSAS CITY, MO | 2024 | 8,694 | 8,694 | — |
| E. R. CARPENTER L.P. - POWELL PLANT | PASADENA, TX | 2024 | 7,543 | 7,543 | — |
| GREAT LAKES CHEMICAL, SOUTH PLANT | EL DORADO, AR | 2024 | 7,023 | 7,023 | — |
| THE DOW CHEMICAL COMPANY - LOUISIANA OPERATIONS | PLAQUEMINE, LA | 2024 | 6,379 | 6,379 | — |
| HERCULES INC AN AQUALON DIV | KENEDY, TX | 2024 | 4,400 | 4,400 | — |
| UNION CARBIDE CORP -SO CHARLESTON FAC. | SOUTH CHARLESTON, WV | 2024 | 3,609 | 3,609 | — |
| HARCROS CHEMICALS INC. - KANSAS CITY | KANSAS CITY, KS | 2024 | 3,400 | 3,400 | — |
| SI GROUP SWMU 130 (FORMER BURN PIT AREA) | ORANGEBURG, SC | 2024 | 3,055 | 3,055 | — |
| ASHLAND SPECIALTY INGREDIENTS GP | HOPEWELL, VA | 2024 | 2,773 | 2,773 | — |
| BAKER PETROLITE CORP | SAND SPRINGS, OK | 2024 | 2,509 | 2,509 | — |
| MONUMENT CHEMICAL KENTUCKY LLC | BRANDENBURG, KY | 2024 | 2,162 | 2,152 | 10 |
| NUTRITION & BIOSCIENCES USA 1, LLC, MIDLAND | MIDLAND, MI | 2024 | 1,727 | 1,727 | — |
| TATE & LYLE INGREDIENTS AMERICAS LLC | HOULTON, ME | 2024 | 1,666 | 1,666 | — |
| BASF CORP | WYANDOTTE, MI | 2024 | 1,276 | 1,239 | 12 |
| SOLVAY USA LLC (VERNON, TEXAS FACILITY) | VERNON, TX | 2024 | 1,142 | 1,142 | — |
| LANXESS CORPORATION - CHARLESTON, SC PLANT | CHARLESTON, SC | 2024 | 1,075 | 1,075 | — |
| HUNTSMAN PETROCHEMICAL LLC | DAYTON, TX | 2024 | 1,001 | 1,001 | — |
| NUTRITION & BIOSCIENCES USA 1 LLC - PLAQUEMINE METHOCEL | PLAQUEMINE, LA | 2024 | 884 | 884 | — |
| COVESTRO LLC, SOUTH CHARLESTON | SOUTH CHARLESTON, WV | 2024 | 860 | 860 | — |
| BASF CORPORATION | SPARTANBURG, SC | 2024 | 855 | 855 | — |
| ELITE SPICE, INC | HANOVER, MD | 2024 | 765 | 765 | — |
| ICL-NORTH AMERICA INC - GALLIPOLIS FERRY PLANT | GALLIPOLIS FERRY, WV | 2024 | 687 | 687 | — |
| TRADEMARK | RENO, NV | 2024 | 662 | 662 | — |
| BRASKEM AMERICA SEADRIFT OPERATIONS | SEADRIFT, TX | 2024 | 624 | 624 | — |
| WATERLOO | JESSUP, MD | 2024 | 602 | 602 | — |
| CHEMSTAR PRODUCTS COMPANY | BROOKHAVEN, MS | 2024 | 562 | 562 | — |
| TRECORA WAX LLC | PASADENA, TX | 2024 | 370 | 370 | — |
| TRICAL INC. | MOJAVE, CA | 2024 | 366 | 366 | — |
| RUBICON LLC - GEISMAR FACILITY | GEISMAR, LA | 2024 | 317 | 317 | — |
| CHEMSTAR PRODUCTS COMPANY | CARLTON, MN | 2024 | 315 | 315 | — |
| ELITE SPICE INC. | SPARKS, NV | 2024 | 311 | 311 | — |
| ELITE SPICE | JESSUP, MD | 2024 | 292 | 292 | — |
| SEKISUI SPECIALTY CHEMICALS AMERICA LLC. - PASADENA PLANT | PASADENA, TX | 2024 | 255 | 255 | — |