EPA Air · stack tests by state, industry and year
Chemical manufacturing (NAICS 3251): stack tests in Iowa, 2025
- 171Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row is one stack test recorded during 2025 at a Iowa source whose primary industry code is NAICS 3251. A facility filing more than one industry code is counted under the first one on its record.
Chemical manufacturing (NAICS 3251) in Iowa, other years
Other industries in Iowa, 2025
- Utilities (NAICS 2211) 110
- Food manufacturing (NAICS 3112) 49
- Primary metal manufacturing (NAICS 3311) 12
- Utilities (NAICS 2213) 11
- Chemical manufacturing (NAICS 3259) 10
- Primary metal manufacturing (NAICS 3313) 9
- Pipeline transportation (NAICS 4862) 9
- Food manufacturing (NAICS 3111) 9
- Data processing and hosting (NAICS 5182) 9
- Nonmetallic mineral product manufacturing (NAICS 3274) 8
- Primary metal manufacturing (NAICS 3315) 8
- Chemical manufacturing (NAICS 3253) 8
- Publishing industries (NAICS 5112) 6
- Machinery manufacturing (NAICS 3331) 6
- Professional, scientific and technical services (NAICS 5419) 6
- Nonmetallic mineral product manufacturing (NAICS 3273) 6
- Hospitals (NAICS 6221) 5
- Mining and quarrying (NAICS 2123) 5
- Agriculture and forestry support (NAICS 1151) 5
- Food manufacturing (NAICS 3116) 4
- Petroleum and coal products manufacturing (NAICS 3241) 3
- Nonmetallic mineral product manufacturing (NAICS 3279) 3
- Justice, public order and safety (NAICS 9221) 3
Air-emissions stack tests recorded in Iowa, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-12-18 | POET BIOREFINING IOWA FALLS, LLC — high-priority violation on file | IOWA FALLS, Hardin, IA | Pass | State |
| 2025-12-18 | POET BIOREFINING IOWA FALLS, LLC — high-priority violation on file | IOWA FALLS, Hardin, IA | Pass | State |
| 2025-12-17 | POET BIOREFINING IOWA FALLS, LLC — high-priority violation on file | IOWA FALLS, Hardin, IA | Pass | State |
| 2025-12-17 | POET BIOREFINING IOWA FALLS, LLC — high-priority violation on file | IOWA FALLS, Hardin, IA | Pass | State |
| 2025-12-16 | BIG RIVER UNITED ENERGY LLC-DYERSVILLE | DYERSVILLE, Dubuque, IA | Pass | State |
| 2025-12-16 | BIG RIVER UNITED ENERGY LLC-DYERSVILLE | DYERSVILLE, Dubuque, IA | Pass | State |
| 2025-12-12 | VALERO RENEWABLE FUELS COMPANY. LLC D/B/A VALERO LAKOTA PLANT — high-priority violation on file | LAKOTA, Kossuth, IA | Pass | State |
| 2025-12-12 | VALERO RENEWABLE FUELS COMPANY. LLC D/B/A VALERO LAKOTA PLANT — high-priority violation on file | LAKOTA, Kossuth, IA | Pass | State |
| 2025-12-12 | DANISCO US, INC. — high-priority violation on file | CEDAR RAPIDS, Linn, IA | Fail | Local |
| 2025-12-11 | GREEN PLAINS SHENANDOAH LLC (GP SHENANDOAH) | SHENANDOAH, Fremont, IA | Pass | State |
| 2025-12-11 | POET BIOREFINING - ARTHUR, LLC — high-priority violation on file | ARTHUR, Ida, IA | Pass | State |
| 2025-12-10 | GREEN PLAINS SHENANDOAH LLC (GP SHENANDOAH) | SHENANDOAH, Fremont, IA | Pass | State |
| 2025-12-04 | HOMELAND ENERGY SOLUTIONS LLC — high-priority violation on file | LAWLER, Chickasaw, IA | Pass | State |
| 2025-12-04 | HOMELAND ENERGY SOLUTIONS LLC — high-priority violation on file | LAWLER, Chickasaw, IA | Pass | State |
| 2025-12-03 | POET BIOREFINING IOWA FALLS, LLC — high-priority violation on file | IOWA FALLS, Hardin, IA | Pass | State |
| 2025-12-02 | POET BIOREFINING IOWA FALLS, LLC — high-priority violation on file | IOWA FALLS, Hardin, IA | Pass | State |
| 2025-12-02 | POET BIOREFINING IOWA FALLS, LLC — high-priority violation on file | IOWA FALLS, Hardin, IA | Pass | State |
| 2025-11-20 | VALERO RENEWABLE FUELS CO LLC-FT DODGE | FORT DODGE, Webster, IA | Pass | State |
| 2025-11-19 | VALERO RENEWABLE FUELS CO LLC-FT DODGE | FORT DODGE, Webster, IA | Pass | State |
| 2025-11-18 | VALERO RENEWABLE FUELS CO LLC-FT DODGE | FORT DODGE, Webster, IA | Pass | State |
| 2025-11-13 | VALERO RENEWABLE FUELS LLC-CHARLES CITY | CHARLES CITY, Floyd, IA | Pass | State |
| 2025-11-13 | VALERO RENEWABLE FUELS LLC-CHARLES CITY | CHARLES CITY, Floyd, IA | Pass | State |
| 2025-11-12 | POET BIOREFINING - MENLO, LLC | MENLO, Guthrie, IA | Pass | State |
| 2025-11-11 | VALERO RENEWABLE FUELS LLC-CHARLES CITY | CHARLES CITY, Floyd, IA | Pass | State |
| 2025-10-29 | HOMELAND ENERGY SOLUTIONS LLC — high-priority violation on file | LAWLER, Chickasaw, IA | Pass | State |
| 2025-10-28 | POET BIOREFINING - MENLO, LLC | MENLO, Guthrie, IA | Pass | State |
| 2025-10-22 | VALERO RENEWABLE FUELS CO LLC-ALBERTCITY | ALBERT CITY, Buena Vista, IA | Pass | State |
| 2025-10-16 | ABSOLUTE ENERGY LLC-SAINT ANSGAR (MONA) | SAINT ANSGAR, Mitchell, IA | Pass | State |
| 2025-10-16 | VALERO RENEWABLE FUELS CO LLC-HARTLEY — high-priority violation on file | HARTLEY, O'Brien, IA | Pass | State |
| 2025-10-15 | VALERO RENEWABLE FUELS CO LLC-HARTLEY — high-priority violation on file | HARTLEY, O'Brien, IA | Pass | State |
| 2025-10-15 | VALERO RENEWABLE FUELS CO LLC-HARTLEY — high-priority violation on file | HARTLEY, O'Brien, IA | Pass | State |
| 2025-10-09 | ABSOLUTE ENERGY LLC-SAINT ANSGAR (MONA) | SAINT ANSGAR, Mitchell, IA | Pass | State |
| 2025-08-27 | POET BIOREFINING CORNING — high-priority violation on file | CORNING, Adams, IA | Pass | State |
| 2025-08-26 | POET BIOREFINING CORNING — high-priority violation on file | CORNING, Adams, IA | Pass | State |
| 2025-08-26 | LOUIS DREYFUS COMPANY GRAND JUNCTION, LLC | GRAND JUNCTION, Greene, IA | Pass | State |
| 2025-08-26 | LOUIS DREYFUS COMPANY GRAND JUNCTION, LLC | GRAND JUNCTION, Greene, IA | Pass | State |
| 2025-08-20 | POET BIOREFINING - LIBERTY (EMMETSBURG) — high-priority violation on file | EMMETSBURG, Palo Alto, IA | Fail | State |
| 2025-08-15 | ELITE OCTANE, LLC — high-priority violation on file | ATLANTIC, Cass, IA | Pass | State |
| 2025-08-14 | ELITE OCTANE, LLC — high-priority violation on file | ATLANTIC, Cass, IA | Pass | State |
| 2025-08-14 | ELITE OCTANE, LLC — high-priority violation on file | ATLANTIC, Cass, IA | Pass | State |
| 2025-08-14 | ELITE OCTANE, LLC — high-priority violation on file | ATLANTIC, Cass, IA | Pass | State |
| 2025-08-13 | ELITE OCTANE, LLC — high-priority violation on file | ATLANTIC, Cass, IA | Pass | State |
| 2025-08-13 | ELITE OCTANE, LLC — high-priority violation on file | ATLANTIC, Cass, IA | Pass | State |
| 2025-08-08 | VALERO RENEWABLE FUELS COMPANY. LLC D/B/A VALERO LAKOTA PLANT — high-priority violation on file | LAKOTA, Kossuth, IA | Pass | State |
| 2025-08-06 | PLCP, L.P. | STEAMBOAT ROCK, Hardin, IA | Pass | State |
| 2025-08-06 | PLCP, L.P. | STEAMBOAT ROCK, Hardin, IA | Pass | State |
| 2025-07-29 | HOMELAND ENERGY SOLUTIONS LLC — high-priority violation on file | LAWLER, Chickasaw, IA | Pass | State |
| 2025-07-29 | HOMELAND ENERGY SOLUTIONS LLC — high-priority violation on file | LAWLER, Chickasaw, IA | Pass | State |
| 2025-07-23 | SIOUXLAND ENERGY COOPERATIVE | SIOUX CENTER, Sioux, IA | Pass | State |
| 2025-07-23 | SIOUXLAND ENERGY COOPERATIVE | SIOUX CENTER, Sioux, IA | Pass | State |
| 2025-07-18 | GREEN PLAINS SHENANDOAH LLC (GP SHENANDOAH) | SHENANDOAH, Fremont, IA | Pass | State |
| 2025-07-15 | GREEN PLAINS SHENANDOAH LLC (GP SHENANDOAH) | SHENANDOAH, Fremont, IA | Pass | State |
| 2025-07-10 | VALERO RENEWABLE FUELS COMPANY. LLC D/B/A VALERO LAKOTA PLANT — high-priority violation on file | LAKOTA, Kossuth, IA | Pass | State |
| 2025-07-10 | VALERO RENEWABLE FUELS COMPANY. LLC D/B/A VALERO LAKOTA PLANT — high-priority violation on file | LAKOTA, Kossuth, IA | Pass | State |
| 2025-07-09 | VALERO RENEWABLE FUELS COMPANY. LLC D/B/A VALERO LAKOTA PLANT — high-priority violation on file | LAKOTA, Kossuth, IA | Pass | State |
| 2025-07-09 | VALERO RENEWABLE FUELS COMPANY. LLC D/B/A VALERO LAKOTA PLANT — high-priority violation on file | LAKOTA, Kossuth, IA | Pass | State |
| 2025-07-08 | VALERO RENEWABLE FUELS COMPANY. LLC D/B/A VALERO LAKOTA PLANT — high-priority violation on file | LAKOTA, Kossuth, IA | Fail | State |
| 2025-07-02 | POET BIOREFINING - COON RAPIDS, LLC | COON RAPIDS, Guthrie, IA | Pending | State |
| 2025-07-02 | POET BIOREFINING - COON RAPIDS, LLC | COON RAPIDS, Guthrie, IA | Pass | State |
| 2025-07-02 | POET BIOREFINING - COON RAPIDS, LLC | COON RAPIDS, Guthrie, IA | Pass | State |
| 2025-07-02 | POET BIOREFINING - COON RAPIDS, LLC | COON RAPIDS, Guthrie, IA | Pass | State |
| 2025-07-02 | POET BIOREFINING - COON RAPIDS, LLC | COON RAPIDS, Guthrie, IA | Pass | State |
| 2025-06-30 | VANTAGE CORN PROCESSORS, LLC | CEDAR RAPIDS, Linn, IA | Pass | Local |
| 2025-06-30 | VANTAGE CORN PROCESSORS, LLC | CEDAR RAPIDS, Linn, IA | Pass | Local |
| 2025-06-27 | VANTAGE CORN PROCESSORS, LLC | CEDAR RAPIDS, Linn, IA | Pass | Local |
| 2025-06-27 | VANTAGE CORN PROCESSORS, LLC | CEDAR RAPIDS, Linn, IA | Pass | Local |
| 2025-06-26 | VALERO RENEWABLE FUELS CO LLC-ALBERTCITY | ALBERT CITY, Buena Vista, IA | Pass | State |
| 2025-06-26 | THE ANDERSONS MARATHON HOLDINGS LLC — high-priority violation on file | DENISON, Crawford, IA | Pass | State |
| 2025-06-26 | KOCH FERTILIZER FT. DODGE, LLC | FORT DODGE, Webster, IA | Pass | State |
| 2025-06-26 | VANTAGE CORN PROCESSORS, LLC | CEDAR RAPIDS, Linn, IA | Pass | Local |
| 2025-06-26 | VANTAGE CORN PROCESSORS, LLC | CEDAR RAPIDS, Linn, IA | Pass | Local |
| 2025-06-25 | VALERO RENEWABLE FUELS CO LLC-ALBERTCITY | ALBERT CITY, Buena Vista, IA | Pass | State |
| 2025-06-25 | THE ANDERSONS MARATHON HOLDINGS LLC — high-priority violation on file | DENISON, Crawford, IA | Pass | State |
| 2025-06-25 | THE ANDERSONS MARATHON HOLDINGS LLC — high-priority violation on file | DENISON, Crawford, IA | Pass | State |
| 2025-06-25 | PLYMOUTH ENERGY LLC | MERRILL, Plymouth, IA | Pass | State |
| 2025-06-25 | PLYMOUTH ENERGY LLC | MERRILL, Plymouth, IA | Pass | State |
| 2025-06-25 | VANTAGE CORN PROCESSORS, LLC | CEDAR RAPIDS, Linn, IA | Pass | Local |
| 2025-06-24 | VANTAGE CORN PROCESSORS, LLC | CEDAR RAPIDS, Linn, IA | Pass | Local |
| 2025-06-24 | VANTAGE CORN PROCESSORS, LLC | CEDAR RAPIDS, Linn, IA | Pass | Local |
| 2025-06-24 | VANTAGE CORN PROCESSORS, LLC | CEDAR RAPIDS, Linn, IA | Pass | Local |
| 2025-06-19 | CENTRAL IOWA RENEWABLE ENERGY (CORN) LP | GOLDFIELD, Wright, IA | Pass | State |
| 2025-06-19 | CENTRAL IOWA RENEWABLE ENERGY (CORN) LP | GOLDFIELD, Wright, IA | Pass | State |
| 2025-06-18 | HOMELAND ENERGY SOLUTIONS LLC — high-priority violation on file | LAWLER, Chickasaw, IA | Pass | State |
| 2025-06-18 | HOMELAND ENERGY SOLUTIONS LLC — high-priority violation on file | LAWLER, Chickasaw, IA | Pass | State |
| 2025-06-18 | VALERO RENEWABLE FUELS CO LLC-FT DODGE | FORT DODGE, Webster, IA | Pass | State |
| 2025-06-18 | VALERO RENEWABLE FUELS CO LLC-FT DODGE | FORT DODGE, Webster, IA | Pass | State |
| 2025-06-18 | CENTRAL IOWA RENEWABLE ENERGY (CORN) LP | GOLDFIELD, Wright, IA | Pass | State |
| 2025-06-17 | HOMELAND ENERGY SOLUTIONS LLC — high-priority violation on file | LAWLER, Chickasaw, IA | Pass | State |
| 2025-06-17 | HOMELAND ENERGY SOLUTIONS LLC — high-priority violation on file | LAWLER, Chickasaw, IA | Pass | State |
| 2025-06-17 | POET BIOREFINING - JEWELL | JEWELL, Hamilton, IA | Pass | State |
| 2025-06-17 | ABSOLUTE ENERGY LLC-SAINT ANSGAR (MONA) | SAINT ANSGAR, Mitchell, IA | Pass | State |
| 2025-06-17 | CENTRAL IOWA RENEWABLE ENERGY (CORN) LP | GOLDFIELD, Wright, IA | Fail | State |
| 2025-06-13 | POET BIOREFINING - FAIRBANK, LLC | FAIRBANK, Buchanan, IA | Pass | State |
| 2025-06-13 | POET BIOREFINING IOWA FALLS, LLC — high-priority violation on file | IOWA FALLS, Hardin, IA | Pass | State |
| 2025-06-13 | POET BIOREFINING IOWA FALLS, LLC — high-priority violation on file | IOWA FALLS, Hardin, IA | Pass | State |
| 2025-06-13 | DANISCO US, INC. — high-priority violation on file | CEDAR RAPIDS, Linn, IA | Pass | Local |
| 2025-06-12 | POET BIOREFINING - FAIRBANK, LLC | FAIRBANK, Buchanan, IA | Pass | State |
| 2025-06-12 | BIG RIVER UNITED ENERGY LLC-DYERSVILLE | DYERSVILLE, Dubuque, IA | Pass | State |
| 2025-06-12 | VALERO RENEWABLE FUELS LLC-CHARLES CITY | CHARLES CITY, Floyd, IA | Pass | State |
| 2025-06-12 | VALERO RENEWABLE FUELS LLC-CHARLES CITY | CHARLES CITY, Floyd, IA | Pass | State |
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Primary NAICS code as filed on the facility record; dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.