EPA Air · stack tests by state and year

Air-emissions stack tests in Delaware, 2026

73Stack tests

A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every stack test below was recorded against a source in Delaware during 2026; one facility can appear more than once, because this is a record of what happened rather than a list of places.

Counties in Delaware, 2026

Delaware, other years

Air-emissions stack tests recorded in Delaware, 2026

Date	Facility	Where	Kind	Agency
2026-07-30	FIRST STATE GENERATION, LLC	WILMINGTON, New Castle, DE	Pending	State
2026-07-23	DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file	DELAWARE CITY, New Castle, DE	Pending	State
2026-07-22	DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file	DELAWARE CITY, New Castle, DE	Pending	State
2026-07-21	DELAWARE CITY REFINING CO-DELAWARE CITY — high-priority violation on file	DELAWARE CITY, New Castle, DE	Pending	State
2026-06-03	ORIENT CORPORATION OF AMERICA	SEAFORD, Sussex, DE	Pass	State
2026-06-03	ORIENT CORPORATION OF AMERICA	SEAFORD, Sussex, DE	Pass	State
2026-06-03	ORIENT CORPORATION OF AMERICA	SEAFORD, Sussex, DE	Pass	State
2026-05-27	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-05-27	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-05-27	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-05-27	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-05-27	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-05-27	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-05-27	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-05-27	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-05-27	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-05-27	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-05-07	DUPONT EXPERIMENTAL STATION	WILMINGTON, New Castle, DE	Pass	State
2026-05-07	DUPONT EXPERIMENTAL STATION	WILMINGTON, New Castle, DE	Pass	State
2026-05-07	DUPONT EXPERIMENTAL STATION	WILMINGTON, New Castle, DE	Pass	State
2026-05-06	DUPONT EXPERIMENTAL STATION	WILMINGTON, New Castle, DE	Pass	State
2026-05-06	DUPONT EXPERIMENTAL STATION	WILMINGTON, New Castle, DE	Pass	State
2026-05-06	DUPONT EXPERIMENTAL STATION	WILMINGTON, New Castle, DE	Pass	State
2026-05-05	DUPONT EXPERIMENTAL STATION	WILMINGTON, New Castle, DE	Pass	State
2026-05-05	DUPONT EXPERIMENTAL STATION	WILMINGTON, New Castle, DE	Pass	State
2026-05-05	DUPONT EXPERIMENTAL STATION	WILMINGTON, New Castle, DE	Pass	State
2026-04-29	WARREN F BEASLEY POWER STATION (DEMEC)	SMYRNA, Kent, DE	Pass	State
2026-04-29	WARREN F BEASLEY POWER STATION (DEMEC)	SMYRNA, Kent, DE	Pass	State
2026-04-29	WARREN F BEASLEY POWER STATION (DEMEC)	SMYRNA, Kent, DE	Pass	State
2026-04-29	WARREN F BEASLEY POWER STATION (DEMEC)	SMYRNA, Kent, DE	Pass	State
2026-04-29	NEXPERA, LLC - NEXPERA RED LION PLANT	NEW CASTLE, New Castle, DE	Pass	State
2026-04-29	NEXPERA, LLC - NEXPERA RED LION PLANT	NEW CASTLE, New Castle, DE	Pass	State
2026-04-29	NEXPERA, LLC - NEXPERA RED LION PLANT	NEW CASTLE, New Castle, DE	Fail	State
2026-03-04	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-03-04	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-03-04	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-03-04	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-03-04	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-03-04	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-03-04	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-03-04	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-03-04	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-03-04	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-03-04	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-03-04	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-03-04	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-03-04	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-03-04	AMERESCO DELAWARE ENERGY LLC - CENTRAL	SANDTOWN, Kent, DE	Pass	State
2026-02-13	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-13	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-13	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-13	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-13	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-11	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-11	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-11	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-11	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-11	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-11	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-11	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-11	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-11	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-11	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-10	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-10	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-10	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-10	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-10	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-10	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-10	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-10	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-10	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State
2026-02-10	AMERESCO DELAWARE ENERGY - SOUTHERN	GEORGETOWN, Sussex, DE	Pass	State

Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.