EPA Air · stack tests by county and year
Air-emissions stack tests in Northampton County, Pennsylvania, 2026
- 5Stack 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 |
|---|---|---|---|
| 2026-06-12 | 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 |
| 2026-03-18 | 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.