EPA Air · stack tests by county and year
Air-emissions stack tests in Delaware County, Pennsylvania, 2025
- 14Stack 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 Delaware 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 Delaware County facility page.
Delaware County, Pennsylvania, 2025
Air-emissions stack tests in Delaware County, other years
Air-emissions stack tests recorded in Delaware County, Pennsylvania, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-10-31 | KIMBERLY CLARK CORP/CHESTER OPR | Pass | State |
| 2025-10-14 | MONROE ENERGY LLC/TRAINER — high-priority violation on file | Pass | State |
| 2025-09-24 | REWORLD DELAWARE VALLEY LP/DELAWARE VALLEY RES REC — high-priority violation on file | Pass | State |
| 2025-08-13 | NEW CONGOL/TRAINER PLT — high-priority violation on file | Pass | State |
| 2025-07-02 | DELAWARE CNTY REG WA/DELCORA WESTERN REG TRMT PLT | Pass | State |
| 2025-07-01 | DELAWARE CNTY REG WA/DELCORA WESTERN REG TRMT PLT | Pass | State |
| 2025-07-01 | HEIDELBERG MTLS NORTHEAST PA / GLEN MILLS HMA PLT — high-priority violation on file | Pass | State |
| 2025-06-18 | REWORLD DELAWARE VALLEY LP/DELAWARE VALLEY RES REC — high-priority violation on file | Pass | State |
| 2025-06-11 | ENERGY TRANSFER MKT & TERM LP/TWIN OAKS TERM | Pass | State |
| 2025-06-10 | ENERGY TRANSFER MKT & TERM LP/TWIN OAKS TERM | Pass | State |
| 2025-04-03 | BOEING CO PHILA/RIDLEY PARK PA FAC — high-priority violation on file | Pass | State |
| 2025-04-03 | BOEING CO PHILA/RIDLEY PARK PA FAC — high-priority violation on file | Pass | State |
| 2025-03-04 | VILLANOVA UNIV/MAIN CAMPUS | Pass | State |
| 2025-01-21 | VILLANOVA UNIV/MAIN CAMPUS | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.