EPA Air · stack tests by county and year
Air-emissions stack tests in Northampton County, Pennsylvania, 2025
- 15Stack 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 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 Northampton County facility page.
Northampton County, Pennsylvania, 2025
Air-emissions stack tests in Northampton County, other years
Air-emissions stack tests recorded in Northampton County, Pennsylvania, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-10-29 | COLUMBIA GAS TRANS CORP/FORKS TWP FAC EASTON CTA | Pass | State |
| 2025-10-29 | ADELPHIA GATEWAY/MARTINS CREEK STA | Pass | State |
| 2025-10-17 | KEYSTONE PORTLAND CEMENT/EAST ALLEN — high-priority violation on file | Pass | State |
| 2025-10-15 | UE-02102PA LLC/FED EX ALLENTOWN | Pass | State |
| 2025-07-23 | HERCULES CEMENT CO LLC/STOCKERTOWN | Pass | State |
| 2025-07-17 | KEYSTONE PORTLAND CEMENT/EAST ALLEN — high-priority violation on file | Pass | State |
| 2025-06-20 | HEIDELBERG MATERIALS US CEMENT LLC/NAZARETH | Pass | State |
| 2025-06-19 | HEIDELBERG MATERIALS US CEMENT LLC/NAZARETH | Pass | State |
| 2025-06-10 | FRESHPET INC/BETHLEHEM | Pass | State |
| 2025-05-29 | ARIA ENERGY EAST LLC | Pass | State |
| 2025-05-21 | KEYSTONE PORTLAND CEMENT/EAST ALLEN — high-priority violation on file | Pass | State |
| 2025-03-26 | NORTHAMPTON GEN CO/NORTHAMPTON | Pass | State |
| 2025-03-18 | NORTHAMPTON GEN CO/NORTHAMPTON | Pass | State |
| 2025-02-25 | CALPINE BETHLEHEM LLC/BETHLEHEM — high-priority violation on file | Pass | State |
| 2025-01-30 | 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.