EPA Air · stack tests by county and year
Air-emissions stack tests in New Castle County, Delaware, 2026
- 16Stack 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 New Castle County, Delaware 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 New Castle County facility page.
New Castle County, Delaware, 2026
Air-emissions stack tests in New Castle County, other years
Air-emissions stack tests recorded in New Castle County, Delaware, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-07-30 | FIRST STATE GENERATION, LLC | Pending | State |
| 2026-07-23 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pending | State |
| 2026-07-22 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pending | State |
| 2026-07-21 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pending | State |
| 2026-05-07 | DUPONT EXPERIMENTAL STATION | Pass | State |
| 2026-05-07 | DUPONT EXPERIMENTAL STATION | Pass | State |
| 2026-05-07 | DUPONT EXPERIMENTAL STATION | Pass | State |
| 2026-05-06 | DUPONT EXPERIMENTAL STATION | Pass | State |
| 2026-05-06 | DUPONT EXPERIMENTAL STATION | Pass | State |
| 2026-05-06 | DUPONT EXPERIMENTAL STATION | Pass | State |
| 2026-05-05 | DUPONT EXPERIMENTAL STATION | Pass | State |
| 2026-05-05 | DUPONT EXPERIMENTAL STATION | Pass | State |
| 2026-05-05 | DUPONT EXPERIMENTAL STATION | Pass | State |
| 2026-04-29 | NEXPERA, LLC - NEXPERA RED LION PLANT | Pass | State |
| 2026-04-29 | NEXPERA, LLC - NEXPERA RED LION PLANT | Pass | State |
| 2026-04-29 | NEXPERA, LLC - NEXPERA RED LION PLANT | Fail | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.