EPA Air · stack tests by county and year

Air-emissions stack tests in Weld County, Colorado, 2025

186Stack 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 Weld County, Colorado 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 Weld County facility page.

Weld County, Colorado, 2025

Air-emissions stack tests in Weld County, other years

Air-emissions stack tests recorded in Weld County, Colorado, 2025

Date	Facility	Kind	Agency
2025-12-31	PDC ENERGY INC - CALIFORNIA 14 SEC HZ	Pass	State
2025-12-30	PDC ENERGY, INC. - STOUT 18 SEC HZ	Pass	State
2025-12-23	NOBLE ENERGY - LD22-A ECONODE T9N-R58W-S	Pass	State
2025-12-23	PDC ENERGY - MARKET FEDERAL 18 SEC HZ	Pass	State
2025-12-18	LEPRINO FOODS COMPANY - GREELEY PLANT	Fail	State
2025-12-18	REP PROCESSING - SEVERANCE COMP STATION	Pass	State
2025-12-17	DCP OPERATING CO - O'CONNOR GAS PLANT	Pass	State
2025-12-17	DCP OPERATING CO - O'CONNOR GAS PLANT	Pass	State
2025-12-17	BONANZA CRK ENERGY - NORTH PLATTE 24-34	N/A	State
2025-12-17	BONANZA CRK ENERGY - NORTH PLATTE 24-34	Pass	State
2025-12-17	REP PROCESSING - SEVERANCE COMP STATION	Pass	State
2025-12-17	REP PROCESSING - SEVERANCE COMP STATION	Pass	State
2025-12-16	HIGHPOINT - ANSCHUTZ EQUUS FARMS 4-62-28	Pass	State
2025-12-16	REP PROCESSING - SEVERANCE COMP STATION	Pass	State
2025-12-16	REP PROCESSING - SEVERANCE COMP STATION	Pass	State
2025-12-15	REP PROCESSING - SEVERANCE COMP STATION	Pass	State
2025-12-15	REP PROCESSING - SEVERANCE COMP STATION	Pass	State
2025-12-10	DCP OPERATING CO - LUCERNE 2 GAS PLANT — high-priority violation on file	N/A	State
2025-12-10	DCP OPERATING CO - LUCERNE 2 GAS PLANT — high-priority violation on file	N/A	State
2025-12-01	BONANZA CREEK - STATE PRONGHORN CPF 41-3	Fail	State
2025-11-26	DCP OPERATING CO - ROGGEN NGPP — high-priority violation on file	Pass	State
2025-11-19	OWENS-BROCKWAY GLASS - WINDSOR #28 — high-priority violation on file	Fail	State
2025-11-17	HIGHPOINT - ANSCHUTZ EQUUS FARMS 4-62-15	Pass	State
2025-11-13	BONANZA CREEK ENERGY- NORTH PLATTE 14-36	Fail	State
2025-11-13	BONANZA CREEK ENERGY- NORTH PLATTE 14-36	Fail	State
2025-11-11	WES DJ GATHERING - FREDERICK CS — high-priority violation on file	Pass	State
2025-11-05	HIGHPOINT - ANSCHUTZ EQUUS FARMS 4-62-28	Pass	State
2025-10-30	COLORADO INTERSTATE GAS CO - CHEYENNE CS — high-priority violation on file	Pass	State
2025-10-30	HIGHPOINT - ANSCHUTZ EQUUS FARMS 4-62-28	Pass	State
2025-10-30	HIGHPOINT - ANSCHUTZ EQUUS FARMS 4-62-28	Pass	State
2025-10-30	HIGHPOINT - ANSCHUTZ EQUUS FARMS 4-62-28	Pass	State
2025-10-30	HIGHPOINT - ANSCHUTZ EQUUS FARMS 4-62-28	Pass	State
2025-10-29	COLORADO INTERSTATE GAS CO - CHEYENNE CS — high-priority violation on file	Pass	State
2025-10-29	PUBLIC SERV - ROCKY MOUNTAIN ENERGY	Pass	State
2025-10-29	BONANZA CREEK - STATE ANTELOPE CPF O-1	Fail	State
2025-10-28	COLORADO INTERSTATE GAS CO - CHEYENNE CS — high-priority violation on file	Pass	State
2025-10-23	WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file	Pass	State
2025-10-22	WES DJ GATHERING - FREDERICK CS — high-priority violation on file	Pass	State
2025-10-21	DCP OPERATING CO - LIBSACK C.S.	Pass	State
2025-10-20	DCP OPERATING CO - LIBSACK C.S.	N/A	State
2025-10-16	BIOCHAR NOW, LLC - BERTHOUD PLANT	Pass	State
2025-10-14	PDC ENERGY - ORR STATE 40-36 PAD	Pass	State
2025-10-14	NOBLE ENERGY - NCLP PC AA04 AA06 ECONODE	Pass	State
2025-10-10	SUMMIT DJ-O OPERATING - KOKI — high-priority violation on file	Pass	State
2025-10-09	DCP OPERATING CO - ROGGEN NGPP — high-priority violation on file	Fail	State
2025-10-09	WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file	Pass	State
2025-10-09	DCP OPERATING CO - ENTERPRISE C.S. — high-priority violation on file	Pass	State
2025-10-09	EXTRACTION - WAKE EAST 32N PROD FACILITY	Pass	State
2025-10-08	DCP OPERATING CO - ENTERPRISE C.S. — high-priority violation on file	Pending	State
2025-10-08	DCP OPERATING CO - ENTERPRISE C.S. — high-priority violation on file	Pass	State
2025-10-06	EXTRACTION - WAKE EAST 32N PROD FACILITY	Pass	State
2025-10-06	EXTRACTION - WAKE EAST 32N PROD FACILITY	Pass	State
2025-10-03	WES DJ GATHERING - FREDERICK CS — high-priority violation on file	Pass	State
2025-10-02	PAWNEE WASTE - PAWNEE WASTE E&P LANDFILL	Pass	State
2025-09-29	WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file	Pass	State
2025-09-28	ROCKY MT MIDSTREAM- KEENESBURG GAS PLANT	Pass	State
2025-09-25	LEPRINO FOODS COMPANY - GREELEY PLANT	N/A	State
2025-09-25	PRAIRIE OPERATING CO - HESTER FARMS II	Pass	State
2025-09-24	HIGHPOINT - PAPPENHEIM 6-62-23	Pass	State
2025-09-24	PDC ENERGY - POSTLE IC WEST	Pass	State
2025-09-18	WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file	Pass	State
2025-09-08	DCP OPERATING CO - CROSSROADS FACILITY	Pass	State
2025-09-08	DCP OPERATING CO - CROSSROADS FACILITY	Pass	State
2025-09-03	BONANZA CREEK ENERGY - ANTELOPE SECTION	Pending	State
2025-09-03	BONANZA CREEK ENERGY - ANTELOPE SECTION	Pending	State
2025-09-03	PDC ENERGY - WIEDEMAN/BOOMERANG PAD — high-priority violation on file	Pass	State
2025-08-28	BONANZA CREEK - ANTELOPE CPF 13-21	N/A	State
2025-08-26	BONANZA CRK STATE NORTH PLATTE CPF 42-26	Pass	State
2025-08-25	BONANZA CREEK - STATE NORTH PLATTE T-36	Pass	State
2025-08-25	BONANZA CREEK - STATE NORTH PLATTE T-36	Pass	State
2025-08-25	BONANZA CREEK - STATE NORTH PLATTE T-36	Pass	State
2025-08-22	WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file	N/A	State
2025-08-22	DCP OPERATING CO - LUCERNE 2 GAS PLANT — high-priority violation on file	Pass	State
2025-08-21	WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file	N/A	State
2025-08-05	NOBLE ENERGY - TIMBRO LC13 ECONODE	Pass	State
2025-08-04	EXTRACTION OIL & GAS - FRYE NORTH	Pass	State
2025-08-04	EXTRACTION OIL & GAS - FRYE NORTH	Pass	State
2025-08-01	ROCKY MOUNTAIN MIDSTREAM - AUBURN CS	Pass	State
2025-07-31	WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER — high-priority violation on file	N/A	State
2025-07-29	PRAIRIE OPERATING - BURROUGHS PROD FAC	Pass	State
2025-07-23	PUBLIC SERV - ROCKY MOUNTAIN ENERGY	Pass	State
2025-07-22	PUBLIC SERV - ROCKY MOUNTAIN ENERGY	Pass	State
2025-07-22	BONANZA CREEK - ANTELOPE CPF 13-21	Pass	State
2025-07-22	ROCK & RAIL - HIGHWAY 34 FACILITY	Pass	State
2025-07-21	BONANZA CREEK - ANTELOPE CPF 13-21	Pass	State
2025-07-21	BONANZA CREEK - ANTELOPE CPF 13-21	Pass	State
2025-07-09	DCP OPERATING CO - MEWBOURN — high-priority violation on file	Pass	State
2025-06-27	ROCKY MOUNTAIN MIDSTREAM - AUBURN CS	N/A	State
2025-06-23	DCP OPERATING CO - O'CONNOR GAS PLANT	Pass	State
2025-06-23	DCP OPERATING CO - O'CONNOR GAS PLANT	Pass	State
2025-06-19	DCP OPERATING CO - SULLIVAN C.S.	Pass	State
2025-06-19	PRAIRIE OPERATING CO - REEMAN PAD	Pass	State
2025-06-18	BONANZA CREEK ENERGY - ANTELOPE SECTION	Pass	State
2025-06-18	DCP OPERATING CO - ROCKY TURBINE CS	Pass	State
2025-06-18	DCP OPERATING CO - ROCKY TURBINE CS	Pass	State
2025-06-12	WASTE MGMT - NORTH WELD LANDFILL	Pass	State
2025-06-09	PDC ENERGY - VOLT 5 SEC HZ	Fail	State
2025-06-03	DCP OPERATING CO - MEWBOURN — high-priority violation on file	Pass	State
2025-06-03	NOBLE ENERGY - CUTTHROAT,BROOK,RAINBOW	Pass	State
2025-05-27	BONANZA CREEK - ANTELOPE CPF 13-21	Pass	State

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

What this page shows

This page covers Clean Air Act facilities in the EPA air register with stack tests in Weld county, CO, in 2025. It lists 186 stack tests recorded in 2025.