EPA Air · stack tests by year
Air-emissions stack tests in 2026
- 11,110Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
States, 2026
- Ohio 1,474
- Indiana 1,010
- California 979
- Florida 795
- Wyoming 755
- New Mexico 724
- Georgia 509
- Pennsylvania 501
- Arkansas 374
- Alabama 357
- Missouri 326
- Texas 316
- Mississippi 263
- Michigan 207
- North Carolina 188
- Colorado 185
- Iowa 167
- Illinois 165
- South Carolina 135
- Wisconsin 135
- West Virginia 114
- Virginia 98
- Idaho 96
- Montana 91
- Tennessee 84
- Minnesota 84
- Delaware 73
- Kentucky 71
- Arizona 71
- Connecticut 68
- Kansas 63
- Nevada 57
- Massachusetts 54
- North Dakota 52
- Nebraska 51
- Utah 51
- Washington 46
- Alaska 45
- New York 43
- South Dakota 34
- District of Columbia 30
- New Hampshire 29
- Maryland 28
- Oregon 27
- Louisiana 26
- Hawaii 21
- Oklahoma 15
- Rhode Island 13
- Puerto Rico 5
- Maine 5
Other years
Air-emissions stack tests recorded in 2026
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2026-02-26 | FLORIDA GAS TRANSMISSION COMPANY, LLC | MILTON, Santa Rosa, FL | Pass | State |
| 2026-02-26 | FLORIDA GAS TRANSMISSION COMPANY, LLC | MILTON, Santa Rosa, FL | Pass | State |
| 2026-02-26 | FLORIDA POWER & LIGHT COMPANY | PACE, Santa Rosa, FL | Pass | State |
| 2026-02-26 | CENTERS FOR DISEASE CONTROL AND PREVENTION (CDC) | ATLANTA, DeKalb, GA | Pass | State |
| 2026-02-26 | BIO ENERGY (GEORGIA II) LLC | VALDOSTA, Lowndes, GA | Pass | State |
| 2026-02-26 | BIO ENERGY (GEORGIA II) LLC | VALDOSTA, Lowndes, GA | Pass | State |
| 2026-02-26 | BIO ENERGY (GEORGIA II) LLC | VALDOSTA, Lowndes, GA | Pass | State |
| 2026-02-26 | BIO ENERGY (GEORGIA II) LLC | VALDOSTA, Lowndes, GA | Pass | State |
| 2026-02-26 | BIO ENERGY (GEORGIA II) LLC | VALDOSTA, Lowndes, GA | Pass | State |
| 2026-02-26 | BIO ENERGY (GEORGIA II) LLC | VALDOSTA, Lowndes, GA | Pass | State |
| 2026-02-26 | UNIVERSITY OF IOWA | IOWA CITY, Johnson, IA | Pass | State |
| 2026-02-26 | NORTHWEST PIPELINE LLC SODA SPRINGS | GEORGETOWN, Bear Lake, ID | Pass | State |
| 2026-02-26 | LACROSSE MUN. POWER PLANT (AIR) | LA CROSSE, Rush, KS | Pass | State |
| 2026-02-26 | OCCIDENTAL CHEMICAL CORPORATION | LUDINGTON, Mason, MI | Pass | State |
| 2026-02-26 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | MONROE, Monroe, MI | Pass | State |
| 2026-02-26 | NORTHERN NATURAL GAS CO - HINCKLEY | HINCKLEY, Pine, MN | Pass | State |
| 2026-02-26 | MISSISSIPPI LIME COMPANY | SAINTE GENEVIEVE, Ste. Genevieve, MO | Pass | State |
| 2026-02-26 | AMERICA'S HEARTLAND PACKING | WRIGHT CITY, Warren, MO | Pending | State |
| 2026-02-26 | ALPEK POLYESTER MISSISSIPPI INC — high-priority violation on file | BAY ST. LOUI, Hancock, MS | Pass | State |
| 2026-02-26 | ALPEK POLYESTER MISSISSIPPI INC — high-priority violation on file | BAY ST. LOUI, Hancock, MS | Pass | State |
| 2026-02-26 | TREE BRAND PACKAGING - NEWTON FACILITY (ACI) | NEWTON, Catawba, NC | Pass | State |
| 2026-02-26 | DUKE ENERGY CORPORATION LCTS | STANLEY, Lincoln, NC | Pass | State |
| 2026-02-26 | HF SINCLAIR NAVAJO REFINING LLC (ARTESIA) — high-priority violation on file | ARTESIA, Eddy, NM | Pass | State |
| 2026-02-26 | HF SINCLAIR NAVAJO REFINING LLC (ARTESIA) — high-priority violation on file | ARTESIA, Eddy, NM | Pass | State |
| 2026-02-26 | GRANDI COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2026-02-26 | US GYPSUM COMPANY | GYPSUM, Ottawa, OH | Pass | State |
| 2026-02-26 | US GYPSUM COMPANY | GYPSUM, Ottawa, OH | Pass | State |
| 2026-02-26 | ROCKIES EXPRESS PIPELINE - SENECA COMPRESSOR STATION — high-priority violation on file | OHIO, Undetermined, OH | Pass | State |
| 2026-02-26 | ROCKIES EXPRESS PIPELINE - SENECA COMPRESSOR STATION — high-priority violation on file | OHIO, Undetermined, OH | Pass | State |
| 2026-02-26 | ROCKIES EXPRESS PIPELINE - SENECA COMPRESSOR STATION — high-priority violation on file | OHIO, Undetermined, OH | Pass | State |
| 2026-02-26 | TRAMMO NITROGEN PRODUCTS, INC. | NORTH BEND, Hamilton, OH | Pass | State |
| 2026-02-26 | KENVUE BRANDS LLC/WHITEMARSH TWP — high-priority violation on file | FORT WASHINGTON, Montgomery, PA | Pass | State |
| 2026-02-26 | MARKWEST LIBERTY MIDSTREAM & RESOURCES/LOWRY COMP STA | AVELLA, Washington, PA | Pass | State |
| 2026-02-26 | REPSOL OIL & GAS LLC/COLE COMP STA | TROY, Bradford, PA | Pass | State |
| 2026-02-26 | JKLM ENERGY LLC/REESE HOLLOW 117 WELL PAD | COUDERSPORT, Potter, PA | Pass | State |
| 2026-02-26 | SRG GLOBAL COATINGS, LLC - NEWBURN | NEWBERN, Dyer, TN | Pass | State |
| 2026-02-26 | SOUTH SUGARLOAF CENTRAL FACILITY | KENEDY, Karnes, TX | Pass | State |
| 2026-02-26 | SOUTH SUGARLOAF CENTRAL FACILITY | KENEDY, Karnes, TX | Pass | State |
| 2026-02-26 | SOUTH SUGARLOAF CENTRAL FACILITY | KENEDY, Karnes, TX | Pass | State |
| 2026-02-26 | IRON MOUNTAIN INFORMATION MANAGEMENT LLC — high-priority violation on file | MANASSAS, Prince William, VA | Fail | State |
| 2026-02-26 | UNIVERSITY OF VIRGINIA | CHARLOTTESVILLE, Charlottesville (city), VA | Pass | State |
| 2026-02-26 | TESORO REFINING AND MARKETING COMPANY | ANACORTES, Skagit, WA | Pass | Local |
| 2026-02-26 | BLUE RACER MIDSTREAM, LLC, NATRIUM EXTRACTION & FRACTIONA | NATRIUM, Marshall, WV | Pass | State |
| 2026-02-26 | COLUMBIA GAS TRANSMISSION, LLC, CEREDO | HUNTINGTON, Wayne, WV | Pass | State |
| 2026-02-26 | HATCHET COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2026-02-26 | HATCHET COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2026-02-26 | HATCHET COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2026-02-26 | HATCHET COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2026-02-26 | HF SINCLAIR PARCO REFINING LLC — high-priority violation on file | SINCLAIR, Carbon, WY | Pass | State |
| 2026-02-26 | BLACKS FORK GAS PLANT (HARVEST MIDSTREAM COMPANY) | GRANGER, Sweetwater, WY | Pass | State |
| 2026-02-26 | BLACKS FORK GAS PLANT (HARVEST MIDSTREAM COMPANY) | GRANGER, Sweetwater, WY | Pass | State |
| 2026-02-26 | BLACKS FORK GAS PLANT (HARVEST MIDSTREAM COMPANY) | GRANGER, Sweetwater, WY | Pass | State |
| 2026-02-25 | INTERNATIONAL PAPER COMPANY — high-priority violation on file | SELMA, Dallas, AL | Pass | State |
| 2026-02-25 | HIGH-PURITY SILICON AMERICA CORPORATION | THEODORE, Mobile, AL | Pass | State |
| 2026-02-25 | SANDERS LEAD CO | TROY, Pike, AL | Pass | State |
| 2026-02-25 | SANDERS LEAD CO | TROY, Pike, AL | Pass | State |
| 2026-02-25 | SANDERS LEAD CO | TROY, Pike, AL | Pass | State |
| 2026-02-25 | SANDERS LEAD CO | TROY, Pike, AL | Pass | State |
| 2026-02-25 | SANDERS LEAD CO | TROY, Pike, AL | Pass | State |
| 2026-02-25 | SANDERS LEAD CO | TROY, Pike, AL | Pass | State |
| 2026-02-25 | HARRELL'S COATING SOLUTIONS, LLC | SYLACAUGA, Talladega, AL | Pass | State |
| 2026-02-25 | BIG RIVER STEEL LLC | OSCEOLA, Mississippi, AR | Pass | State |
| 2026-02-25 | BIG RIVER STEEL LLC | OSCEOLA, Mississippi, AR | Pass | State |
| 2026-02-25 | BRADLEY INTERNATIONAL AIRPORT / AMERESCO SELECT, INC. | WINDSOR LOCKS, Hartford, CT | Pass | State |
| 2026-02-25 | U.S. GSA CENTRAL HEATING PLANT — high-priority violation on file | WASHINGTON, District of Columbia, DC | Pass | State |
| 2026-02-25 | WASHINGTON DC CONVENTION CENTER — high-priority violation on file | WASHINGTON, District of Columbia, DC | Pass | State |
| 2026-02-25 | WASHINGTON DC CONVENTION CENTER — high-priority violation on file | WASHINGTON, District of Columbia, DC | Incomplete | State |
| 2026-02-25 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-25 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-25 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-25 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-25 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-25 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-25 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-25 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-25 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-25 | FLORIDA POWER & LIGHT (PMT) | PARRISH, Manatee, FL | Pass | State |
| 2026-02-25 | FLORIDA POWER & LIGHT COMPANY | PACE, Santa Rosa, FL | Pass | State |
| 2026-02-25 | SEMINOLE CO. BOARD OF CO. COMMISSIONERS | GENEVA, Seminole, FL | Pass | State |
| 2026-02-25 | SEMINOLE CO. BOARD OF CO. COMMISSIONERS | GENEVA, Seminole, FL | Pass | State |
| 2026-02-25 | SEMINOLE CO. BOARD OF CO. COMMISSIONERS | GENEVA, Seminole, FL | Pass | State |
| 2026-02-25 | SEMINOLE CO. BOARD OF CO. COMMISSIONERS | GENEVA, Seminole, FL | Pass | State |
| 2026-02-25 | CENTERS FOR DISEASE CONTROL AND PREVENTION (CDC) | ATLANTA, DeKalb, GA | Pass | State |
| 2026-02-25 | CENTERS FOR DISEASE CONTROL AND PREVENTION (CDC) | ATLANTA, DeKalb, GA | Pass | State |
| 2026-02-25 | GEORGIA-PACIFIC SAVANNAH RIVER LLC | RINCON, Effingham, GA | Pass | State |
| 2026-02-25 | GEORGIA-PACIFIC SAVANNAH RIVER LLC | RINCON, Effingham, GA | Pass | State |
| 2026-02-25 | GEORGIA-PACIFIC SAVANNAH RIVER LLC | RINCON, Effingham, GA | Pass | State |
| 2026-02-25 | GEORGIA-PACIFIC SAVANNAH RIVER LLC | RINCON, Effingham, GA | Pass | State |
| 2026-02-25 | SOUTHERN POWER - WANSLEY COMBINED CYCLE | FRANKLIN, Heard, GA | Pass | State |
| 2026-02-25 | SOUTHERN POWER - WANSLEY COMBINED CYCLE | FRANKLIN, Heard, GA | Pass | State |
| 2026-02-25 | BIO ENERGY (GEORGIA II) LLC | VALDOSTA, Lowndes, GA | Pass | State |
| 2026-02-25 | BIO ENERGY (GEORGIA II) LLC | VALDOSTA, Lowndes, GA | Pass | State |
| 2026-02-25 | BIO ENERGY (GEORGIA II) LLC | VALDOSTA, Lowndes, GA | Pass | State |
| 2026-02-25 | BIO ENERGY (GEORGIA II) LLC | VALDOSTA, Lowndes, GA | Pass | State |
| 2026-02-25 | BIO ENERGY (GEORGIA II) LLC | VALDOSTA, Lowndes, GA | Pass | State |
| 2026-02-25 | BIO ENERGY (GEORGIA II) LLC | VALDOSTA, Lowndes, GA | Pass | State |
| 2026-02-25 | CLEARWATER PAPER CORPORATION - AUGUSTA MILL — high-priority violation on file | AUGUSTA, Richmond, GA | Pass | State |
| 2026-02-25 | KINGMAN MUN. POWER PLANT (AIR) | KINGMAN, Kingman, KS | Pass | State |
| 2026-02-25 | CORNING INCORPORATED | HARRODSBURG, Mercer, KY | Pass | State |
| 2026-02-25 | LA MIDSTREAM GAS SERVICES LLC - NORTH DESOTO CENTRAL FACILITY | FRIERSON, De Soto, LA | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.