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 |
|---|---|---|---|---|
| 2025-05-22 | HOLCIM (US) INC | GRAND CHAIN, Massac, IL | Pass | State |
| 2025-05-22 | HOLCIM (US) INC | GRAND CHAIN, Massac, IL | Pass | State |
| 2025-05-21 | HOLCIM (US) INC | GRAND CHAIN, Massac, IL | Pass | State |
| 2025-05-20 | HOLCIM (US) INC | GRAND CHAIN, Massac, IL | Pass | State |
| 2025-05-16 | HEIDELBERG MATERIALS MIDWEST AGG INC | THORNTON, Cook, IL | Pass | State |
| 2025-05-15 | MEXICHEM SPECIALTY RESINS INC — high-priority violation on file | HENRY, Marshall, IL | Pass | State |
| 2025-05-14 | DYNACHEM INC | WESTVILLE, Vermilion, IL | Pass | State |
| 2025-05-14 | DYNACHEM INC | WESTVILLE, Vermilion, IL | Pass | State |
| 2025-05-14 | DYNACHEM INC | WESTVILLE, Vermilion, IL | Pass | State |
| 2025-05-09 | HEIDELBERG MATERIALS - FAIRMOUNT QUARRY | FAIRMOUNT, Vermilion, IL | Pass | State |
| 2025-05-08 | CITGO PETROLEUM CORP — high-priority violation on file | LEMONT, Will, IL | Pass | State |
| 2025-05-05 | ROCK RIVER WATER RECLAMATION DISTRICT — high-priority violation on file | ROCKFORD, Winnebago, IL | Pass | State |
| 2025-04-24 | ABBVIE INC | NORTH CHICAGO, Lake, IL | Pass | State |
| 2025-04-23 | RIVER VALLEY RECYCLING LLC — high-priority violation on file | KANKAKEE, Kankakee, IL | Pass | State |
| 2025-04-03 | PEOPLES GAS LIGHT & COKE CO | FISHER, Champaign, IL | Pass | State |
| 2025-04-03 | PEOPLES GAS LIGHT & COKE CO | FISHER, Champaign, IL | Pass | State |
| 2025-04-02 | A FINKL & SONS CO | CHICAGO, Cook, IL | Pass | State |
| 2025-04-02 | A FINKL & SONS CO | CHICAGO, Cook, IL | Pass | State |
| 2025-04-02 | WOODLAND RECYCLING AND DISPOSAL FACILITY | SOUTH ELGIN, Kane, IL | Pass | State |
| 2025-04-01 | PEOPLES GAS LIGHT & COKE CO | FISHER, Champaign, IL | Pass | State |
| 2025-04-01 | WOODLAND RECYCLING AND DISPOSAL FACILITY | SOUTH ELGIN, Kane, IL | Pass | State |
| 2025-03-25 | INGREDION INC — high-priority violation on file | BEDFORD PARK, Cook, IL | Fail | State |
| 2025-03-25 | ADVOCATE SHERMAN HOSPITAL | ELGIN, Kane, IL | Pass | State |
| 2025-03-25 | ADVOCATE SHERMAN HOSPITAL | ELGIN, Kane, IL | Pass | State |
| 2025-03-25 | SOUTHERN ILLINOIS POWER COOP | MARION, Williamson, IL | Pass | State |
| 2025-03-24 | ADVOCATE ILLINOIS MASONIC MEDICAL CENTER | CHICAGO, Cook, IL | Pass | State |
| 2025-03-24 | ADVOCATE ILLINOIS MASONIC MEDICAL CENTER | CHICAGO, Cook, IL | Pass | State |
| 2025-03-19 | MORRIS COGENERATION LLC | MORRIS, Grundy, IL | Pass | State |
| 2025-03-18 | MORRIS COGENERATION LLC | MORRIS, Grundy, IL | Pass | State |
| 2025-03-17 | MORRIS COGENERATION LLC | MORRIS, Grundy, IL | Pass | State |
| 2025-03-11 | ILLINOIS POWER GENERATING CO | NEWTON, Jasper, IL | Pass | State |
| 2025-03-11 | NATURAL GAS PIPELINE | CROPSEY, Livingston, IL | Pass | State |
| 2025-03-07 | PAXXUS INC | ADDISON, DuPage, IL | Pass | State |
| 2025-03-07 | PAXXUS INC | ADDISON, DuPage, IL | Pass | State |
| 2025-03-05 | JO-CARROLL ENERGY - YORK SUBSTATION | THOMSON, Carroll, IL | Pass | State |
| 2025-03-05 | JO-CARROLL ENERGY - YORK SUBSTATION | THOMSON, Carroll, IL | Pass | State |
| 2025-03-04 | JO-CARROLL ENERGY - YORK SUBSTATION | THOMSON, Carroll, IL | Pass | State |
| 2025-03-04 | JO-CARROLL ENERGY - YORK SUBSTATION | THOMSON, Carroll, IL | Pass | State |
| 2025-03-04 | ADVANCED DISPOSAL SERVICES ORCHARD HILLS LANDFILL INC | DAVIS JUNCTION, Ogle, IL | Pass | State |
| 2025-03-04 | ADVANCED DISPOSAL SERVICES ORCHARD HILLS LANDFILL INC | DAVIS JUNCTION, Ogle, IL | Pass | State |
| 2025-02-27 | JACKSON ENERGY CENTER | ELWOOD, Will, IL | Pending | State |
| 2025-02-27 | JACKSON ENERGY CENTER | ELWOOD, Will, IL | Pass | State |
| 2025-02-26 | MIDWESTERN GAS TRANSMISSION COMPANY - STATION 2121 | HERSCHER, Kankakee, IL | Pass | State |
| 2025-02-26 | MIDWESTERN GAS TRANSMISSION COMPANY - STATION 2121 | HERSCHER, Kankakee, IL | Pass | State |
| 2025-02-26 | MIDWESTERN GAS TRANSMISSION COMPANY - STATION 2121 | HERSCHER, Kankakee, IL | Pass | State |
| 2025-02-26 | SWAN SURFACES LLC | CENTRALIA, Marion, IL | Pass | State |
| 2025-02-25 | ABBVIE INC | NORTH CHICAGO, Lake, IL | Pass | State |
| 2025-02-25 | GUARDIAN PIPELINE CO | CHANNAHON, Will, IL | Pass | State |
| 2025-02-25 | GUARDIAN PIPELINE CO | CHANNAHON, Will, IL | Pass | State |
| 2025-02-25 | GUARDIAN PIPELINE CO | CHANNAHON, Will, IL | Pass | State |
| 2025-02-21 | NATURAL GAS PIPELINE CO OF AMERICA | HERSCHER, Kankakee, IL | Pass | State |
| 2025-02-06 | PAXXUS INC | ADDISON, DuPage, IL | Pending | State |
| 2025-02-06 | PAXXUS INC | ADDISON, DuPage, IL | Pass | State |
| 2025-02-06 | PAXXUS INC | ADDISON, DuPage, IL | Pending | State |
| 2025-02-05 | PAXXUS INC | ADDISON, DuPage, IL | Pass | State |
| 2025-02-05 | PAXXUS INC | ADDISON, DuPage, IL | Pass | State |
| 2025-02-04 | UNIVERSITY OF ILLINOIS | CHAMPAIGN, Champaign, IL | Pass | State |
| 2025-01-30 | NORTHWEST COMMUNITY HOSPITAL | ARLINGTON HEIGHTS, Cook, IL | Pass | State |
| 2025-01-30 | NORTHWEST COMMUNITY HOSPITAL | ARLINGTON HEIGHTS, Cook, IL | Pass | State |
| 2025-01-29 | SYENSQO USA LLC | BLUE ISLAND, Cook, IL | Pending | U.S. EPA |
| 2025-01-21 | EXXON MOBIL OIL CORP — high-priority violation on file | CHANNAHON, Will, IL | Pending | State |
| 2025-01-21 | EXXON MOBIL OIL CORP — high-priority violation on file | CHANNAHON, Will, IL | Pending | State |
| 2025-01-21 | EXXON MOBIL OIL CORP — high-priority violation on file | CHANNAHON, Will, IL | Pass | State |
| 2025-01-21 | EXXON MOBIL OIL CORP — high-priority violation on file | CHANNAHON, Will, 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.