EPA Air · stack tests by county and year
Air-emissions stack tests in New Castle County, Delaware, 2025
- 163Stack 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 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 New Castle County facility page.
New Castle County, Delaware, 2025
Air-emissions stack tests in New Castle County, other years
Air-emissions stack tests recorded in New Castle County, Delaware, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-12-19 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-12-19 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-12-19 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-12-19 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-12-19 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-12-05 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-05 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-05 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-05 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-05 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-05 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-05 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-04 | ROHM & HAAS ELECTRONIC MATERIALS,CMP,INC | Pass | State |
| 2025-12-04 | ROHM & HAAS ELECTRONIC MATERIALS,CMP,INC | Pass | State |
| 2025-12-04 | ROHM & HAAS ELECTRONIC MATERIALS,CMP,INC | Pass | State |
| 2025-12-04 | ROHM & HAAS ELECTRONIC MATERIALS,CMP,INC | Pass | State |
| 2025-12-04 | ROHM & HAAS ELECTRONIC MATERIALS,CMP,INC | Pass | State |
| 2025-12-04 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-04 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-04 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-04 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-04 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-04 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-04 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-04 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-04 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-04 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-04 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-04 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-04 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-04 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-04 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-04 | CHRISTIANA CARE HEALTH SERVICES - CHRISTIANA HOSPITAL | Pass | State |
| 2025-12-03 | ROHM & HAAS ELECTRONIC MATERIALS,CMP,INC | Pass | State |
| 2025-11-24 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-11-24 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-11-24 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-11-19 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-11-19 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-11-19 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-11-04 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-11-04 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-11-04 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-11-04 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-10-22 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-10-22 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-10-22 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-10-08 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Fail | State |
| 2025-10-07 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-10-02 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Fail | State |
| 2025-10-02 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-09-30 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Fail | State |
| 2025-09-30 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Fail | State |
| 2025-09-26 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-09-25 | FIRST STATE GENERATION, LLC | Pass | State |
| 2025-09-25 | OMI, INC./CITY OF WILMINGTON (REBF) | Pass | State |
| 2025-09-25 | OMI, INC./CITY OF WILMINGTON (REBF) | Pass | State |
| 2025-09-25 | OMI, INC./CITY OF WILMINGTON (REBF) | Pass | State |
| 2025-09-25 | OMI, INC./CITY OF WILMINGTON (REBF) | Pass | State |
| 2025-09-24 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-09-24 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-09-23 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-09-17 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-09-17 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-09-17 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-09-16 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-09-16 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-09-16 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-09-16 | CRODA, INC — high-priority violation on file | Pass | State |
| 2025-09-16 | CRODA, INC — high-priority violation on file | Pass | State |
| 2025-09-16 | CRODA, INC — high-priority violation on file | Pass | State |
| 2025-09-16 | CRODA, INC — high-priority violation on file | Pass | State |
| 2025-09-16 | CRODA, INC — high-priority violation on file | Pass | State |
| 2025-09-11 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-09-11 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-09-11 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-09-11 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-09-04 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-09-04 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-09-04 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-09-04 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-09-04 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-09-04 | DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file | Pass | State |
| 2025-08-15 | CRODA, INC — high-priority violation on file | Pass | State |
| 2025-08-15 | CRODA, INC — high-priority violation on file | Pass | State |
| 2025-08-15 | CRODA, INC — high-priority violation on file | Pass | State |
| 2025-08-15 | CRODA, INC — high-priority violation on file | Pass | State |
| 2025-08-15 | CRODA, INC — high-priority violation on file | Pass | State |
| 2025-08-15 | CRODA, INC — high-priority violation on file | N/A | State |
| 2025-08-14 | CRODA, INC — high-priority violation on file | Pass | State |
| 2025-08-14 | CRODA, INC — high-priority violation on file | Pass | State |
| 2025-08-14 | CRODA, INC — high-priority violation on file | Pass | State |
| 2025-08-14 | CRODA, INC — high-priority violation on file | Pass | State |
| 2025-08-14 | CRODA, INC — high-priority violation on file | Pass | State |
| 2025-08-13 | DUPONT EXPERIMENTAL STATION | Pass | State |
| 2025-08-13 | DUPONT EXPERIMENTAL STATION | Pass | State |
| 2025-08-13 | DUPONT EXPERIMENTAL STATION | Pass | State |
| 2025-08-12 | CRODA, INC — high-priority violation on file | Pass | State |
| 2025-08-12 | CRODA, INC — high-priority violation on file | Pass | State |
| 2025-08-12 | CRODA, INC — high-priority violation on file | Pass | State |
Page 1 of 2NextPage 2
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.