EPA Air · stack tests by county and year
Air-emissions stack tests in Webster County, Iowa, 2025
- 23Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row below is one stack test recorded against a source in Webster County, Iowa during 2025. A facility can appear several times: this is the year’s record of what happened, not a list of places. The sources themselves are on the Webster County facility page.
Webster County, Iowa, 2025
Air-emissions stack tests in Webster County, other years
Air-emissions stack tests recorded in Webster County, Iowa, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-12-18 | CERNE CALCIUM CARBONATE LLC | Pass | State |
| 2025-12-16 | CERNE CALCIUM CARBONATE LLC | Pass | State |
| 2025-12-16 | CERNE CALCIUM CARBONATE LLC | Pass | State |
| 2025-11-20 | VALERO RENEWABLE FUELS CO LLC-FT DODGE | Pass | State |
| 2025-11-19 | VALERO RENEWABLE FUELS CO LLC-FT DODGE | Pass | State |
| 2025-11-18 | VALERO RENEWABLE FUELS CO LLC-FT DODGE | Pass | State |
| 2025-11-06 | MARTIN MARIETTA INC-FORT DODGE | Pass | State |
| 2025-09-22 | GEORGIA-PACIFIC GYPSUM LLC | Pass | State |
| 2025-07-23 | MIDAMERICAN ENERGY COMPANY | Pass | State |
| 2025-06-26 | KOCH FERTILIZER FT. DODGE, LLC | Pass | State |
| 2025-06-19 | FORT DODGE CORRECTIONAL FACILITY | Pass | State |
| 2025-06-19 | FORT DODGE CORRECTIONAL FACILITY | Pass | State |
| 2025-06-18 | FORT DODGE CORRECTIONAL FACILITY | Pass | State |
| 2025-06-18 | VALERO RENEWABLE FUELS CO LLC-FT DODGE | Pass | State |
| 2025-06-18 | VALERO RENEWABLE FUELS CO LLC-FT DODGE | Pass | State |
| 2025-06-11 | GEORGIA-PACIFIC GYPSUM LLC | Pass | State |
| 2025-06-10 | GEORGIA-PACIFIC GYPSUM LLC | Pass | State |
| 2025-06-10 | GEORGIA-PACIFIC GYPSUM LLC | Pass | State |
| 2025-06-06 | GEORGIA-PACIFIC GYPSUM LLC | Pass | State |
| 2025-03-25 | VALERO RENEWABLE FUELS CO LLC-FT DODGE | Pass | State |
| 2025-03-06 | POET BIOREFINING - GOWRIE, LLC — high-priority violation on file | Pass | State |
| 2025-02-20 | POET BIOREFINING - GOWRIE, LLC — high-priority violation on file | Fail | State |
| 2025-01-06 | U S GYPSUM CO-FORT DODGE | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.