EPA Air · stack tests by year
Air-emissions stack tests in 2021
- 35,950Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
States, 2021
- California 17,676
- Ohio 2,582
- Florida 1,540
- Indiana 1,495
- Oklahoma 1,318
- Georgia 1,189
- New Mexico 841
- Pennsylvania 788
- Alabama 621
- Mississippi 589
- Texas 574
- Arkansas 518
- Missouri 515
- Colorado 407
- Iowa 368
- Washington 334
- North Carolina 273
- Michigan 256
- Wisconsin 239
- Wyoming 235
- West Virginia 225
- Kentucky 222
- Delaware 222
- Montana 220
- South Carolina 217
- Minnesota 209
- Kansas 177
- Alaska 143
- Illinois 142
- Utah 140
- Nevada 136
- Virginia 131
- Nebraska 117
- Maine 110
- New Jersey 110
- New York 103
- Connecticut 99
- Tennessee 98
- North Dakota 93
- Arizona 93
- Idaho 90
- Louisiana 69
- Hawaii 64
- Maryland 56
- South Dakota 55
- District of Columbia 54
- New Hampshire 53
- Oregon 45
- Rhode Island 34
- Massachusetts 29
- Puerto Rico 19
- Vermont 17
Other years
Air-emissions stack tests recorded in 2021
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2021-10-14 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-14 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-14 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-14 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-14 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-14 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-14 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-14 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-14 | SUNCOR ENERGY - DENVER REFINERY — high-priority violation on file | COMMERCE CITY, Adams, CO | Pass | State |
| 2021-10-14 | WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file | FORT LUPTON, Weld, CO | Pass | State |
| 2021-10-14 | WES DJ GATHERING - FREDERICK CS — high-priority violation on file | DACONO AREA, Weld, CO | Pass | State |
| 2021-10-14 | WESLEYAN UNIVERSITY - BOILER PLANT | MIDDLETOWN, Middlesex, CT | Pass | State |
| 2021-10-14 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | NEWARK, New Castle, DE | Pass | State |
| 2021-10-14 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | NEWARK, New Castle, DE | Pass | State |
| 2021-10-14 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | NEWARK, New Castle, DE | Pass | State |
| 2021-10-14 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | NEWARK, New Castle, DE | Pass | State |
| 2021-10-14 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | NEWARK, New Castle, DE | Pass | State |
| 2021-10-14 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | NEWARK, New Castle, DE | Pass | State |
| 2021-10-14 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | NEWARK, New Castle, DE | Pass | State |
| 2021-10-14 | BROWARD COUNTY WATER/WASTEWATER SERVICES | POMPANO BEACH, Broward, FL | Pass | State |
| 2021-10-14 | BROWARD COUNTY WATER/WASTEWATER SERVICES | POMPANO BEACH, Broward, FL | Pass | State |
| 2021-10-14 | BROWARD COUNTY WATER/WASTEWATER SERVICES | POMPANO BEACH, Broward, FL | Pass | State |
| 2021-10-14 | REX LUMBER, BRISTOL, LLC | BRISTOL, Liberty, FL | Pass | State |
| 2021-10-14 | VULCAN CONSTRUCTION MATERIALS, LLC - LITHONIA QUARRY | LITHONIA, DeKalb, GA | Pass | State |
| 2021-10-14 | VALERO RENEWABLE FUELS CO LLC-HARTLEY — high-priority violation on file | HARTLEY, O'Brien, IA | Pass | State |
| 2021-10-14 | CLEVELAND CORP | ZION, Lake, IL | Pass | State |
| 2021-10-14 | GREEN CITY CABINETS | ODON, Daviess, IN | Pass | State |
| 2021-10-14 | GREEN CITY CABINETS | ODON, Daviess, IN | Pass | State |
| 2021-10-14 | GREEN CITY CABINETS | ODON, Daviess, IN | Pass | State |
| 2021-10-14 | GREEN CITY CABINETS | ODON, Daviess, IN | Pass | State |
| 2021-10-14 | GREEN CITY CABINETS | ODON, Daviess, IN | Pass | State |
| 2021-10-14 | GREEN CITY CABINETS | ODON, Daviess, IN | Pass | State |
| 2021-10-14 | NORTH VERNON INDUSTRY CORPORATION | NORTH VERNON, Jennings, IN | Pass | State |
| 2021-10-14 | NORTH VERNON INDUSTRY CORPORATION | NORTH VERNON, Jennings, IN | Pass | State |
| 2021-10-14 | WARRICK NEWCO LLC — high-priority violation on file | NEWBURGH, Warrick, IN | Pass | State |
| 2021-10-14 | VALTO INC | FLORENCE, Boone, KY | Pass | State |
| 2021-10-14 | BIG RIVERS ELECTRIC CORP - RD GREEN STATION | ROBARDS, Webster, KY | Pass | State |
| 2021-10-14 | ITW PERFORMANCE POLYMERS | DANVERS, TOWN OF, Essex, MA | Pass | State |
| 2021-10-14 | W. R. GRACE & CO. - CONN. | CURTIS BAY, Baltimore (city), MD | Pass | State |
| 2021-10-14 | LEWISTON-AUBURN WATER POLLUTION CONTROL AUTHORITY | LEWISTON, Androscoggin, ME | Pass | State |
| 2021-10-14 | LEWISTON-AUBURN WATER POLLUTION CONTROL AUTHORITY | LEWISTON, Androscoggin, ME | Pass | State |
| 2021-10-14 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2021-10-14 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2021-10-14 | WILSONART LLC | FLETCHER, Henderson, NC | Pass | State |
| 2021-10-14 | WBI ENERGY TRANSMISSION, INC. - CHARBONNEAU COMPRESSOR STATION - AQ | CARTWRIGHT, McKenzie, ND | Pass | State |
| 2021-10-14 | WBI ENERGY TRANSMISSION, INC. - CHARBONNEAU COMPRESSOR STATION - AQ | CARTWRIGHT, McKenzie, ND | Pass | State |
| 2021-10-14 | BOREALIS MINE | HAWTHORNE, Mineral, NV | Pass | State |
| 2021-10-14 | STARRETT CITY POWER PLANT | BROOKLYN, Kings, NY | Pass | State |
| 2021-10-14 | ELLWOOD ENGINEERED CASTINGS | HUBBARD, Trumbull, OH | Pass | State |
| 2021-10-14 | ELLWOOD ENGINEERED CASTINGS | HUBBARD, Trumbull, OH | Pass | State |
| 2021-10-14 | ELLWOOD ENGINEERED CASTINGS | HUBBARD, Trumbull, OH | Pass | State |
| 2021-10-14 | ELLWOOD ENGINEERED CASTINGS | HUBBARD, Trumbull, OH | Pass | State |
| 2021-10-14 | SHELLY MATERIALS - PLANT #25 | SPRINGFIELD, Clark, OH | Fail | State |
| 2021-10-14 | THE ANDERSONS RENEWABLES LLC - GREENVILLE PLANT — high-priority violation on file | GREENVILLE, Darke, OH | Pass | State |
| 2021-10-14 | THE ANDERSONS RENEWABLES LLC - GREENVILLE PLANT — high-priority violation on file | GREENVILLE, Darke, OH | Pass | State |
| 2021-10-14 | ET GATHERING PROCESSING LLC / INGERSOLL COMPRESSOR STATION | INGERSOLL, Alfalfa, OK | Pass | State |
| 2021-10-14 | DCP OPERATING CO LP / CRUSADER COMPRESSOR STATION | ARNETT, Ellis, OK | Pass | State |
| 2021-10-14 | ET GATHERING PROCESSING LLC / K 9 COMPRESSOR STATION | NASH, Grant, OK | Pass | State |
| 2021-10-14 | MARKWEST OKLAHOMA GAS CO LLC / LAMAR COMPRESSOR STATION | LAMAR, Hughes, OK | Pass | State |
| 2021-10-14 | MARKWEST OKLAHOMA GAS CO LLC / LAMAR COMPRESSOR STATION | LAMAR, Hughes, OK | Pass | State |
| 2021-10-14 | MARKWEST OKLAHOMA GAS CO LLC / STANGL COMPRESSOR STATION | KINGFISHER, Kingfisher, OK | Pass | State |
| 2021-10-14 | OG AND E / SOONER GENERATING STATION | RED ROCK, Noble, OK | Pass | State |
| 2021-10-14 | MAGNESITA REFRACTORIES/YORK — high-priority violation on file | YORK, York, PA | Pass | State |
| 2021-10-14 | YORK CNTY SOLID WASTE/YORK CNTY RESOURCE RECOVERY — high-priority violation on file | YORK, York, PA | Pass | State |
| 2021-10-14 | EQM GATHERING OPCO LLC/TERRA COMP STA | PLUM CREEK, Armstrong, PA | Pass | State |
| 2021-10-14 | PA GEN ENERGY CO LLC/COP TRACT 293 COMP STA | WATERVILLE, Lycoming, PA | Pass | State |
| 2021-10-14 | NEW-INDY CATAWBA LLC | CATAWBA, York, SC | Pass | State |
| 2021-10-14 | ARKOMA OPERATIONS, LLC - IGNACIO GAS TREATING PLANT | SOUTHERN UTE RESERVATION, La Plata, CO | Pass | State |
| 2021-10-14 | ARCONIC US LLC | ALCOA, Blount, TN | Pass | State |
| 2021-10-14 | PRAXIS ENNIS FACILITY | ENNIS, Ellis, TX | Pass | State |
| 2021-10-14 | WISE COUNTY POWER PLANT | POOLVILLE, Wise, TX | Pass | State |
| 2021-10-14 | WISE COUNTY POWER PLANT | POOLVILLE, Wise, TX | Pass | State |
| 2021-10-14 | GRAYMONT WESTERN (CONTINENTAL LIME) | DELTA, Millard, UT | Pass | State |
| 2021-10-14 | TREX COMPANY, INC. - VIRGINIA DECKING AND RAILING | WINCHESTER, Frederick, VA | Pass | State |
| 2021-10-14 | GREEN RIVER SODA ASH PLANT (AMERICAN SODA LLC) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2021-10-13 | DOYON UTILITIES, LLC / FORT WAINWRIGHT (PRIVATIZED EMISSION UN | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2021-10-13 | W&T OFFSHORE, INC. | MOBILE BAY, Mobile, AL | Pass | State |
| 2021-10-13 | W&T OFFSHORE, INC. | MOBILE BAY, Mobile, AL | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.