EPA Air · stack tests by county and year
Air-emissions stack tests in Vermillion County, Indiana, 2025
- 8Stack 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 Vermillion 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 Vermillion County facility page.
Air-emissions stack tests in Vermillion County, other years
What stands out
- Stack tests in Vermillion County, Indiana, rose from 4 in 2023, the previous year on file, to 8 in 2025.
- The county’s file for stack tests holds 5 years of events, from 2017 through 2026.
- Its 8 stack tests rank 47th of the 64 county cells in Indiana for 2025.
- Its 8 stack tests are 0.5% of the 1,621 the state’s file holds for 2025.
Every line is computed by formula from the state’s stored file; nothing is estimated.
Air-emissions stack tests recorded in Vermillion County, Indiana, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-07-24 | DUKE ENERGY INDIANA LLC CAYUGA GENERATING STATION — high-priority violation on file | Pass | State |
| 2025-07-24 | DUKE ENERGY INDIANA LLC CAYUGA GENERATING STATION — high-priority violation on file | Pass | State |
| 2025-07-24 | DUKE ENERGY INDIANA LLC CAYUGA GENERATING STATION — high-priority violation on file | Pass | State |
| 2025-07-24 | DUKE ENERGY INDIANA LLC CAYUGA GENERATING STATION — high-priority violation on file | Pass | State |
| 2025-07-23 | DUKE ENERGY INDIANA LLC CAYUGA GENERATING STATION — high-priority violation on file | Pass | State |
| 2025-07-23 | DUKE ENERGY INDIANA LLC CAYUGA GENERATING STATION — high-priority violation on file | Pass | State |
| 2025-07-23 | DUKE ENERGY INDIANA LLC CAYUGA GENERATING STATION — high-priority violation on file | Pass | State |
| 2025-07-23 | DUKE ENERGY INDIANA LLC CAYUGA GENERATING STATION — 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.
What this page shows
This page covers Clean Air Act facilities in the EPA air register with stack tests in Vermillion county, IN, in 2025. It lists 8 stack tests recorded in 2025.