Velarion Records

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EPA Air · stack tests by county and year

Air-emissions stack tests in Polk County, Iowa, 2025

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 Polk 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 Polk County facility page.

Polk County, Iowa, 2025

Air-emissions stack tests in Polk County, other years

Air-emissions stack tests recorded in Polk County, Iowa, 2025

DateFacilityKindAgency
2025-11-06METRO METHANE RECOVERYPassLocal
2025-11-06METRO METHANE RECOVERYPassLocal
2025-11-06METRO METHANE RECOVERYPassLocal
2025-11-06MICROSOFT CORPORATION - WILLOW CREEK/GINGER EAST DATAFailLocal
2025-10-09MICROSOFT CORPORATION - WILLOW CREEK/GINGER EAST DATAFailLocal
2025-09-09ARCHER DANIELS MIDLAND DM SOYBEAN PLANTPassLocal
2025-09-04MIDAMERICAN ENERGY CO PLEASANT HILL GDMECPassLocal
2025-09-03MIDAMERICAN ENERGY CO PLEASANT HILL GDMECPassLocal
2025-07-22BRIDGESTONE AMERICAS TIRE OPERATIONSPassLocal
2025-07-21ARCHER DANIELS MIDLAND DM SOYBEAN PLANTPassLocal
2025-05-01ARCHER DANIELS MIDLAND DM SOYBEAN PLANTFailLocal
2025-05-01ARCHER DANIELS MIDLAND DM SOYBEAN PLANTPassLocal
2025-03-26MICROSOFT CORPORATION - WILLOW CREEK/GINGER EAST DATAFailLocal
2025-03-25MICROSOFT CORPORATION - WILLOW CREEK/GINGER EAST DATAFailLocal
2025-01-31MICROSOFT CORPORATION - WILLOW CREEK/GINGER EAST DATAFailLocal
2025-01-08MICROSOFT CORPORATION - WILLOW CREEK/GINGER EAST DATAFailLocal

Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.