EPA Air · stack tests by county and year
Air-emissions stack tests in LaPorte County, Indiana, 2025
- 14Stack 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 LaPorte County, Indiana 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 LaPorte County facility page.
LaPorte County, Indiana, 2025
Air-emissions stack tests in LaPorte County, other years
Air-emissions stack tests recorded in LaPorte County, Indiana, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-11-12 | NORTHERN INDIANA PUBLIC SERVICE COMPANY LLC MICHIGAN CITY GE — high-priority violation on file | Pass | State |
| 2025-11-12 | NORTHERN INDIANA PUBLIC SERVICE COMPANY LLC MICHIGAN CITY GE — high-priority violation on file | Pass | State |
| 2025-11-07 | NORTHERN INDIANA PUBLIC SERVICE COMPANY LLC MICHIGAN CITY GE — high-priority violation on file | Pass | State |
| 2025-11-07 | NORTHERN INDIANA PUBLIC SERVICE COMPANY LLC MICHIGAN CITY GE — high-priority violation on file | Pass | State |
| 2025-11-07 | NORTHERN INDIANA PUBLIC SERVICE COMPANY LLC MICHIGAN CITY GE — high-priority violation on file | Pass | State |
| 2025-11-07 | NORTHERN INDIANA PUBLIC SERVICE COMPANY LLC MICHIGAN CITY GE — high-priority violation on file | Pass | State |
| 2025-09-30 | ALPHA BAKING COMPANY INCORPORATED — high-priority violation on file | Pass | State |
| 2025-09-16 | WM TECHNOLOGIES LLC — high-priority violation on file | Pass | State |
| 2025-09-16 | WM TECHNOLOGIES LLC — high-priority violation on file | Pass | State |
| 2025-09-16 | WM TECHNOLOGIES LLC — high-priority violation on file | Pass | State |
| 2025-09-09 | PRECOAT METALS | Pass | State |
| 2025-08-20 | RIETH RILEY ASPHALT PLANT NO 366 | Pass | State |
| 2025-04-22 | PATRICK INDUSTRIES INC DBA GRAVURE INK | Pass | State |
| 2025-03-25 | HITACHI GLOBAL AIR POWER US LLC | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.