EPA Air · stack tests by county and year
Air-emissions stack tests in Porter County, Indiana, 2026
- 13Stack 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 Porter County, Indiana during 2026. 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 Porter County facility page.
Porter County, Indiana, 2026
Air-emissions stack tests in Porter County, other years
Air-emissions stack tests recorded in Porter County, Indiana, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-05-28 | NLMK INDIANA — high-priority violation on file | Pass | State |
| 2026-05-28 | NLMK INDIANA — high-priority violation on file | Pass | State |
| 2026-05-28 | NLMK INDIANA — high-priority violation on file | Pass | State |
| 2026-05-21 | POWDER PROCESSING TECHNOLOGY LLC — high-priority violation on file | Pass | State |
| 2026-05-14 | PVS TECHNOLOGIES INC — high-priority violation on file | Pass | State |
| 2026-05-14 | PVS TECHNOLOGIES INC — high-priority violation on file | Pass | State |
| 2026-05-05 | CLEVELAND-CLIFFS BURNS HARBOR LLC — high-priority violation on file | Pass | State |
| 2026-04-01 | PVS TECHNOLOGIES INC — high-priority violation on file | Pass | State |
| 2026-04-01 | PVS TECHNOLOGIES INC — high-priority violation on file | Pass | State |
| 2026-02-28 | NLMK INDIANA — high-priority violation on file | Pass | State |
| 2026-02-28 | NLMK INDIANA — high-priority violation on file | Pass | State |
| 2026-02-28 | NLMK INDIANA — high-priority violation on file | Pass | State |
| 2026-02-28 | NLMK INDIANA — high-priority violation on file | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.