EPA Air · stack tests by county and year
Air-emissions stack tests in Wells County, Indiana, 2026
- 31Stack 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 Wells 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 Wells County facility page.
Wells County, Indiana, 2026
Air-emissions stack tests in Wells County, other years
Air-emissions stack tests recorded in Wells County, Indiana, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-05-13 | MATALCO BLUFFTON LLC — high-priority violation on file | Pass | State |
| 2026-05-13 | MATALCO BLUFFTON LLC — high-priority violation on file | Pass | State |
| 2026-05-13 | MATALCO BLUFFTON LLC — high-priority violation on file | Pass | State |
| 2026-05-13 | MATALCO BLUFFTON LLC — high-priority violation on file | Pass | State |
| 2026-04-28 | NOVAE LLC — high-priority violation on file | Pass | State |
| 2026-04-28 | NOVAE LLC — high-priority violation on file | Pass | State |
| 2026-04-28 | NOVAE LLC — high-priority violation on file | Pass | State |
| 2026-04-28 | NOVAE LLC — high-priority violation on file | Pass | State |
| 2026-04-16 | VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT | Pass | State |
| 2026-04-16 | VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT | Pass | State |
| 2026-04-01 | MONTPELIER GENERATING STATION LLC — high-priority violation on file | Pass | State |
| 2026-04-01 | MONTPELIER GENERATING STATION LLC — high-priority violation on file | Pass | State |
| 2026-04-01 | MONTPELIER GENERATING STATION LLC — high-priority violation on file | Pass | State |
| 2026-04-01 | MONTPELIER GENERATING STATION LLC — high-priority violation on file | Pass | State |
| 2026-03-31 | MONTPELIER GENERATING STATION LLC — high-priority violation on file | Pass | State |
| 2026-03-31 | MONTPELIER GENERATING STATION LLC — high-priority violation on file | Pass | State |
| 2026-03-31 | MONTPELIER GENERATING STATION LLC — high-priority violation on file | Pass | State |
| 2026-03-31 | MONTPELIER GENERATING STATION LLC — high-priority violation on file | Pass | State |
| 2026-03-30 | MONTPELIER GENERATING STATION LLC — high-priority violation on file | Pass | State |
| 2026-03-30 | MONTPELIER GENERATING STATION LLC — high-priority violation on file | Pass | State |
| 2026-01-29 | VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT | Pass | State |
| 2026-01-29 | VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT | Pass | State |
| 2026-01-29 | VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT | Pass | State |
| 2026-01-29 | VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT | Pass | State |
| 2026-01-29 | VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT | Pass | State |
| 2026-01-28 | VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT | Pass | State |
| 2026-01-28 | VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT | Pass | State |
| 2026-01-22 | MONTPELIER GENERATING STATION LLC — high-priority violation on file | Pass | State |
| 2026-01-22 | MONTPELIER GENERATING STATION LLC — high-priority violation on file | Pass | State |
| 2026-01-21 | MONTPELIER GENERATING STATION LLC — high-priority violation on file | Pass | State |
| 2026-01-21 | MONTPELIER GENERATING STATION LLC — 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 Wells county, IN, for 2026. Stack tests recorded in 2026: 31.