EPA Air · stack tests by county and year
Air-emissions stack tests in Northampton 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 Northampton 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 Northampton County facility page.
Northampton County, Pennsylvania, 2026
Air-emissions stack tests in Northampton County, other years
Air-emissions stack tests recorded in Northampton County, Pennsylvania, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-08-19 | FRESHPET INC/BETHLEHEM | Pass | State |
| 2026-06-12 | HEIDELBERG MATERIALS US CEMENT LLC/NAZARETH | Pass | State |
| 2026-06-10 | HEIDELBERG MATERIALS US CEMENT LLC/NAZARETH | Pass | State |
| 2026-06-03 | FRESHPET INC/BETHLEHEM | Pass | State |
| 2026-05-22 | KEYSTONE PORTLAND CEMENT/EAST ALLEN — high-priority violation on file | Pass | State |
| 2026-03-18 | NORTHAMPTON GEN CO/NORTHAMPTON | Pass | State |
| 2026-01-14 | COLUMBIA GAS TRANS CORP/HELLERTOWN CT | 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 Northampton county, PA, for 2026. The stack tests recorded in 2026 total 5.