EPA Air · stack tests by state and year
Air-emissions stack tests in Illinois, 2025
- 264Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every stack test below was recorded against a source in Illinois during 2025; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in Illinois, 2025
- McHenry County 20
- Cook County 18
- Kane County 17
- Williamson County 16
- Montgomery County 15
- DuPage County 13
- Will County 13
- Lake County 12
- Randolph County 10
- Ogle County 10
- Clinton County 9
- Bureau County 8
- Kankakee County 8
- Madison County 7
- Christian County 6
- Grundy County 6
- Vermilion County 6
- La Salle County 6
- Massac County 5
- Moultrie County 5
- White County 5
- Jasper County 5
- Carroll County 4
- Champaign County 4
- McDonough County 4
- St. Clair County 4
- Livingston County 4
- Monroe County 3
Illinois, other years
Air-emissions stack tests recorded in Illinois, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-12-17 | NORTHERN BORDER PIPELINE CO | CHANNAHON, Will, IL | Pass | State |
| 2025-12-16 | GRAND VICTORIA CASINO | ELGIN, Kane, IL | Pass | State |
| 2025-12-16 | GRAND VICTORIA CASINO | ELGIN, Kane, IL | Pass | State |
| 2025-12-16 | GRAND VICTORIA CASINO | ELGIN, Kane, IL | Pass | State |
| 2025-12-16 | ANR PIPELINE CO | SANDWICH, Kendall, IL | Pass | State |
| 2025-12-16 | US SILICA CO | OTTAWA, La Salle, IL | Pass | State |
| 2025-12-16 | CITY WATER LIGHT & POWER | SPRINGFIELD, Sangamon, IL | Pass | State |
| 2025-12-16 | BUCKEYE TERMINALS LLC | ROCKFORD, Winnebago, IL | Pass | State |
| 2025-12-09 | GRAIN CRAFT CORN LLC — high-priority violation on file | DANVILLE, Vermilion, IL | Fail | State |
| 2025-12-09 | GRAIN CRAFT CORN LLC — high-priority violation on file | DANVILLE, Vermilion, IL | Fail | State |
| 2025-12-03 | ID CASTINGS OF ILLINOIS LLC — high-priority violation on file | MARTINSVILLE, Clark, IL | Pass | State |
| 2025-12-02 | NORTH SHORE GAS CO | LIBERTYVILLE, Lake, IL | Pass | State |
| 2025-12-02 | NORTH SHORE GAS CO | LIBERTYVILLE, Lake, IL | Pass | State |
| 2025-12-02 | NORTH SHORE GAS CO | LIBERTYVILLE, Lake, IL | Pass | State |
| 2025-12-02 | NORTH SHORE GAS CO | LIBERTYVILLE, Lake, IL | Pass | State |
| 2025-12-02 | NORTH SHORE GAS CO | LIBERTYVILLE, Lake, IL | Pass | State |
| 2025-12-02 | US MINERALS | COFFEEN, Montgomery, IL | Fail | State |
| 2025-11-25 | HINSDALE HOSPITAL | HINSDALE, DuPage, IL | Pass | State |
| 2025-11-25 | HINSDALE HOSPITAL | HINSDALE, DuPage, IL | Pass | State |
| 2025-11-25 | HINSDALE HOSPITAL | HINSDALE, DuPage, IL | Pass | State |
| 2025-11-25 | HINSDALE HOSPITAL | HINSDALE, DuPage, IL | Pass | State |
| 2025-11-25 | RIVERSIDE HOSPITAL | KANKAKEE, Kankakee, IL | Pass | State |
| 2025-11-25 | RIVERSIDE HOSPITAL | KANKAKEE, Kankakee, IL | Pass | State |
| 2025-11-25 | RIVERSIDE HOSPITAL | KANKAKEE, Kankakee, IL | Pass | State |
| 2025-11-20 | KINCAID GENERATION LLC | KINCAID, Christian, IL | Pass | State |
| 2025-11-19 | BLUE MOUND COMPRESSOR STATION | BLUE MOUND, Christian, IL | Pass | State |
| 2025-11-19 | SOUTHERN ILLINOIS POWER COOP | MARION, Williamson, IL | Pass | State |
| 2025-11-18 | BLUE MOUND COMPRESSOR STATION | BLUE MOUND, Christian, IL | Pass | State |
| 2025-11-18 | BLUE MOUND COMPRESSOR STATION | BLUE MOUND, Christian, IL | Pass | State |
| 2025-11-18 | MISSISSIPPI LIME CO | PRAIRIE DU ROCHER, Randolph, IL | Pass | State |
| 2025-11-17 | BLUE MOUND COMPRESSOR STATION | BLUE MOUND, Christian, IL | Pass | State |
| 2025-11-17 | BLUE MOUND COMPRESSOR STATION | BLUE MOUND, Christian, IL | Pass | State |
| 2025-11-12 | LIGHTNING RENEWABLE LLC | DESOTO, Jackson, IL | Pass | State |
| 2025-11-12 | LIGHTNING RENEWABLE LLC | DESOTO, Jackson, IL | Pass | State |
| 2025-11-11 | ALLIED TUBE & CONDUIT CORP | HARVEY, Cook, IL | Pass | State |
| 2025-11-11 | HOFFER PLASTICS CORP | SOUTH ELGIN, Kane, IL | Pass | State |
| 2025-11-11 | HOFFER PLASTICS CORP | SOUTH ELGIN, Kane, IL | Pass | State |
| 2025-11-11 | HOFFER PLASTICS CORP | SOUTH ELGIN, Kane, IL | Pass | State |
| 2025-11-11 | HOFFER PLASTICS CORP | SOUTH ELGIN, Kane, IL | Pass | State |
| 2025-11-11 | HOFFER PLASTICS CORP | SOUTH ELGIN, Kane, IL | Pass | State |
| 2025-11-11 | HOFFER PLASTICS CORP | SOUTH ELGIN, Kane, IL | Pass | State |
| 2025-11-11 | HOFFER PLASTICS CORP | SOUTH ELGIN, Kane, IL | Pass | State |
| 2025-11-11 | HOFFER PLASTICS CORP | SOUTH ELGIN, Kane, IL | Pass | State |
| 2025-11-11 | HOFFER PLASTICS CORP | SOUTH ELGIN, Kane, IL | Pass | State |
| 2025-11-11 | ADKINS ENERGY LLC | LENA, Stephenson, IL | Pass | State |
| 2025-11-06 | ILLINOIS CEMENT CO | LASALLE, La Salle, IL | Pass | State |
| 2025-11-06 | PERRY RIDGE LANDFILL | DU QUOIN, Perry, IL | Pass | State |
| 2025-10-21 | NICOR GAS | ANCONA, Livingston, IL | Pass | State |
| 2025-10-21 | NICOR GAS | ANCONA, Livingston, IL | Pass | State |
| 2025-10-21 | NICOR GAS | ANCONA, Livingston, IL | Pass | State |
| 2025-10-17 | SUL4R-PLUS LLC | MARISSA, St. Clair, IL | Pass | State |
| 2025-10-16 | ILLINOIS CEMENT CO | LASALLE, La Salle, IL | Pass | State |
| 2025-10-16 | ILLINOIS CEMENT CO | LASALLE, La Salle, IL | Pass | State |
| 2025-10-14 | ARGONNE NATIONAL LABORATORY | LEMONT, DuPage, IL | Pass | State |
| 2025-10-09 | ILLINOIS POWER GENERATING CO | NEWTON, Jasper, IL | Pass | State |
| 2025-10-09 | LAKE FOREST HOSPITAL | LAKE FOREST, Lake, IL | Pass | State |
| 2025-10-09 | LAKE FOREST HOSPITAL | LAKE FOREST, Lake, IL | Pass | State |
| 2025-10-09 | LAKE FOREST HOSPITAL | LAKE FOREST, Lake, IL | Pass | State |
| 2025-10-09 | LAKE FOREST HOSPITAL | LAKE FOREST, Lake, IL | Pass | State |
| 2025-10-09 | MILAM RECYCLING AND DISPOSAL FACILITY | FAIRMONT CITY, St. Clair, IL | Pass | State |
| 2025-10-09 | MILAM RECYCLING AND DISPOSAL FACILITY | FAIRMONT CITY, St. Clair, IL | Pass | State |
| 2025-10-09 | MILAM RECYCLING AND DISPOSAL FACILITY | FAIRMONT CITY, St. Clair, IL | Pass | State |
| 2025-10-08 | ILLINOIS POWER GENERATING CO | NEWTON, Jasper, IL | Pass | State |
| 2025-10-07 | NOURYON SURFACE CHEMISTRY LLC | MORRIS, Grundy, IL | Pass | State |
| 2025-10-07 | NOURYON SURFACE CHEMISTRY LLC | MORRIS, Grundy, IL | Pass | State |
| 2025-09-30 | E.T. SIMONDS MATERIALS CO | MT VERNON, Jefferson, IL | Fail | State |
| 2025-09-30 | E.T. SIMONDS MATERIALS CO | MT VERNON, Jefferson, IL | Fail | State |
| 2025-09-30 | NICOR GAS | TROY GROVE, La Salle, IL | Pass | State |
| 2025-09-30 | NICOR GAS | TROY GROVE, La Salle, IL | Pass | State |
| 2025-09-17 | BWAY CORP | CHICAGO, Cook, IL | Pass | State |
| 2025-09-17 | DYNEGY MIDWEST GENERATION LLC | BALDWIN, Randolph, IL | Pass | State |
| 2025-09-16 | BWAY CORP | CHICAGO, Cook, IL | Pass | State |
| 2025-09-16 | DYNEGY MIDWEST GENERATION LLC | BALDWIN, Randolph, IL | Pass | State |
| 2025-09-16 | DYNEGY MIDWEST GENERATION LLC | BALDWIN, Randolph, IL | Pass | State |
| 2025-09-16 | DYNEGY MIDWEST GENERATION LLC | BALDWIN, Randolph, IL | Pass | State |
| 2025-09-12 | US ENERGY MT PROSPECT TERMINAL | ARLINGTON HEIGHTS, Cook, IL | Pass | State |
| 2025-09-11 | CHARTER MANUFACTURING CO INC | WOODSTOCK, McHenry, IL | Pass | State |
| 2025-09-10 | KINDER MORGAN LIQUIDS TERMINALS LLC | ELK GROVE VILLAGE, Cook, IL | Pass | State |
| 2025-09-09 | GENEVA GENERATING PLANT | GENEVA, Kane, IL | Pass | State |
| 2025-09-05 | KINDER MORGAN LIQUID TERMINALS LP | SUMMIT, Cook, IL | Pass | State |
| 2025-09-04 | KINDER MORGAN LIQUIDS TERMINALS LLC | FOREST VIEW, Cook, IL | Pass | State |
| 2025-09-03 | KINDER MORGAN LIQUIDS TERMINALS LLC | ROCHELLE, Ogle, IL | Pass | State |
| 2025-09-02 | KINDER MORGAN LIQUIDS TERMINALS LLC | WOOD RIVER, Madison, IL | Pass | State |
| 2025-08-26 | MOUNDS PRODUCTION CO LLC | MOUNDS, Pulaski, IL | Pass | State |
| 2025-08-26 | MOUNDS PRODUCTION CO LLC | MOUNDS, Pulaski, IL | Pass | State |
| 2025-08-26 | CITGO PETROLEUM CORP — high-priority violation on file | LEMONT, Will, IL | Pass | State |
| 2025-08-26 | CITGO PETROLEUM CORP — high-priority violation on file | LEMONT, Will, IL | Pass | State |
| 2025-08-21 | COVIA SOLUTIONS INC | OREGON, Ogle, IL | Pass | State |
| 2025-08-21 | COVIA SOLUTIONS INC | OREGON, Ogle, IL | Pass | State |
| 2025-08-14 | MIDWEST GENERATION LLC | PEKIN, Tazewell, IL | Pass | State |
| 2025-08-05 | SUGAR CAMP ENERGY LLC | MACEDONIA, Franklin, IL | Pending | State |
| 2025-08-05 | SUGAR CAMP ENERGY LLC | MACEDONIA, Franklin, IL | Pass | State |
| 2025-08-05 | ANR PIPELINE CO | SANDWICH, Kendall, IL | Pass | State |
| 2025-07-31 | MCCRONE GROUP THE | WESTMONT, DuPage, IL | Pass | State |
| 2025-07-30 | CHARTER MANUFACTURING CO INC | WOODSTOCK, McHenry, IL | Pass | State |
| 2025-07-29 | ILLINOIS POWER GENERATING CO | NEWTON, Jasper, IL | Pending | State |
| 2025-07-29 | ILLINOIS POWER GENERATING CO | NEWTON, Jasper, IL | Pass | State |
| 2025-07-29 | CHARTER MANUFACTURING CO INC | WOODSTOCK, McHenry, IL | Pass | State |
| 2025-07-28 | CHARTER MANUFACTURING CO INC | WOODSTOCK, McHenry, IL | Pass | State |
| 2025-07-28 | CHARTER MANUFACTURING CO INC | WOODSTOCK, McHenry, IL | Pass | State |
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Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.