EPA Air · stack tests by county and year
Air-emissions stack tests in Jefferson County, Pennsylvania, 2026
- 7Stack 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 Jefferson County, Pennsylvania 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 Jefferson County facility page.
Jefferson County, Pennsylvania, 2026
Air-emissions stack tests in Jefferson County, other years
What stands out
- Stack tests in Jefferson County, Pennsylvania, rose from 6 in 2025, the previous year on file, to 7 in 2026.
- The county’s file for stack tests holds 8 years of events, from 2018 through 2026.
- Its 7 stack tests rank 21st of the 43 county cells in Pennsylvania for 2026.
- Its 7 stack tests are 1.1% of the 636 the state’s file holds for 2026.
Every line is computed by formula from the state’s stored file; nothing is estimated.
Air-emissions stack tests recorded in Jefferson County, Pennsylvania, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-08-31 | COLUMBIA GAS TRANS LLC/IOWA COMP STA | Pass | State |
| 2026-08-26 | EASTERN GAS TRANS & STORAGE/PUNXSUTAWNEY | Pass | State |
| 2026-08-04 | SNYDER BROS INC/HIMES COMP STA | Pass | State |
| 2026-06-25 | O-I GLASS INC/OWENS BROCKWAY GLASS CONTAINER PLT 19 | Pass | State |
| 2026-02-16 | DIVERSIFIED PROD LLC/PINE CREEK COMP STA | Pass | State |
| 2026-02-09 | DIVERSIFIED PROD LLC/BROOKVILLE SOUTH COMP STA | Pass | State |
| 2026-02-09 | XTO ENERGY INC/WINSLOW | 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 Jefferson county, PA, for 2026. Stack tests recorded in 2026: 3.