EPA Air · violations by county and year
High-priority air violations in Porter County, Indiana, 2025
- 21Violations
A high-priority violation is the most serious class of Clean Air Act non-compliance an agency records against a source; a federally reportable violation is the next step down in severity. Each row below is one violation recorded against a source in Porter 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 Porter County facility page.
Porter County, Indiana, 2025
- Inspections 21
- Stack tests 54
High-priority air violations in Porter County, other years
High-priority air violations recorded in Porter County, Indiana, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-12-10 | NLMK INDIANA — high-priority violation on file | HPV day-zero determination | State |
| 2025-11-14 | POWDER PROCESSING TECHNOLOGY LLC — high-priority violation on file | Earliest FRV determination | State |
| 2025-10-30 | CLEVELAND-CLIFFS BURNS HARBOR LLC — high-priority violation on file | Earliest FRV determination | State |
| 2025-10-28 | JET CORR INC/PRATT PAPER (IN) LLC — high-priority violation on file | HPV day-zero determination | State |
| 2025-09-22 | PVS TECHNOLOGIES INC — high-priority violation on file | HPV day-zero determination | State |
| 2025-09-11 | NLMK INDIANA — high-priority violation on file | Earliest FRV determination | State |
| 2025-08-18 | NLMK INDIANA — high-priority violation on file | Earliest FRV determination | State |
| 2025-08-18 | NLMK INDIANA — high-priority violation on file | Earliest FRV determination | State |
| 2025-07-31 | O-N MINERALS (PORTAGE) COMPANY LLC DBA CARMEUSE LIME & STONE — high-priority violation on file | HPV day-zero determination | State |
| 2025-07-30 | CLEVELAND-CLIFFS BURNS HARBOR LLC — high-priority violation on file | Earliest FRV determination | State |
| 2025-07-30 | JET CORR INC/PRATT PAPER (IN) LLC — high-priority violation on file | Earliest FRV determination | State |
| 2025-07-29 | CLEVELAND-CLIFFS BURNS HARBOR LLC — high-priority violation on file | HPV day-zero determination | State |
| 2025-06-24 | PVS TECHNOLOGIES INC — high-priority violation on file | Earliest FRV determination | State |
| 2025-06-19 | NLMK INDIANA — high-priority violation on file | Earliest FRV determination | State |
| 2025-06-04 | POWDER PROCESSING TECHNOLOGY LLC — high-priority violation on file | Earliest FRV determination | State |
| 2025-05-19 | O-N MINERALS (PORTAGE) COMPANY LLC DBA CARMEUSE LIME & STONE — high-priority violation on file | Earliest FRV determination | State |
| 2025-05-02 | O-N MINERALS (PORTAGE) COMPANY LLC DBA CARMEUSE LIME & STONE — high-priority violation on file | Earliest FRV determination | State |
| 2025-04-30 | CLEVELAND-CLIFFS BURNS HARBOR LLC — high-priority violation on file | Earliest FRV determination | State |
| 2025-04-15 | VALPARAISO UNIVERSITY — high-priority violation on file | Earliest FRV determination | State |
| 2025-02-24 | PHOENIX GLOBAL BURNS HARBOR LLC CONTRACTOR OF CLEVELAND CLIF — high-priority violation on file | Earliest FRV determination | State |
| 2025-01-30 | CLEVELAND-CLIFFS BURNS HARBOR LLC — high-priority violation on file | Earliest FRV determination | State |
Dates as filed by the agency that recorded the violation. Figures from EPA’s ICIS-AIR download.