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.
What this page shows
This page covers Clean Air Act facilities in the EPA air register with stack tests in LaPorte county, IN, for 2025. Stack tests recorded in 2025: 14.