EPA Air · by county
Air-emissions sources in Weld County, Colorado
- 8,858Facilities
Every stationary source in Weld County, Colorado that holds a Clean Air Act permit or is otherwise tracked by an air agency — planned, under construction, operating, seasonal or temporarily closed. Sources EPA records as permanently closed are not listed.
By emissions classification in Weld County
A source’s classification is the size band its potential emissions put it in: a major source is large enough to need a Title V operating permit, a synthetic minor has accepted limits to stay below that line, and a minor source sits below it outright.
- Minor source 7,950
- Synthetic minor source 814
- Major source 89
Inspections in Weld County, by year
A compliance evaluation is the on-site or file review a state, local or federal air agency records against a permitted source.
- 2026 inspections 125
- 2025 inspections 440
- 2024 inspections 387
- 2023 inspections 289
- 2022 inspections 246
- 2021 inspections 323
- 2020 inspections 265
- 2019 inspections 152
- 2018 inspections 153
- 2017 inspections 178
Violations in Weld County, by year
A high-priority violation is the most serious class of Clean Air Act non-compliance an agency records against a source; a federally reportable violation is the next step down in severity.
- 2026 violations 4
- 2025 violations 77
- 2024 violations 128
- 2023 violations 89
- 2022 violations 43
- 2021 violations 116
- 2020 violations 66
- 2019 violations 47
- 2018 violations 53
- 2017 violations 29
Stack tests in Weld County, by year
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
- 2026 stack tests 72
- 2025 stack tests 186
- 2024 stack tests 170
- 2023 stack tests 246
- 2022 stack tests 207
- 2021 stack tests 160
- 2020 stack tests 208
- 2019 stack tests 197
- 2018 stack tests 83
- 2017 stack tests 103
Inspections in Weld County, year by year · Violations in Weld County, year by year · Stack tests in Weld County, year by year
Other counties in Colorado
Every county in the state with at least three sources on file.
- Morgan County 61
- Otero County 40
- Ouray County 3
- Park County 17
- Phillips County 22
- Pitkin County 16
- Prowers County 53
- Pueblo County 162
- Rio Blanco County 402
- Rio Grande County 27
- Routt County 45
- Saguache County 14
- San Miguel County 37
- Sedgwick County 15
- Summit County 33
- Teller County 18
- Undetermined County 1,500
- Washington County 85
- Yuma County 152
Facilities
| Facility↑↓ | Classification↑↓ | HPV |
|---|---|---|
| WASTE MANAGEMENT- BUFFALO RIDGE LANDFILL | Major source | No |
| WASTE MGMT - NORTH WELD LANDFILL | Major source | No |
| WATTENBURG HOLDING- EAST PONY STATION | Minor source | No |
| WELD COUNTY - AULT GRADER SHED | Minor source | No |
| WELD COUNTY - JOHNSTOWN GRADER SHED | Minor source | No |
| WELD COUNTY - KERSEY GRADER SHED | Minor source | No |
| WELD COUNTY - SEVERANCE GRADER SHED | Minor source | No |
| WELD COUNTY GOV'T - 911 NOTIFICATION CTR | Minor source | No |
| WELD COUNTY PUB. WORKS-ASHBAUGH PIT | Minor source | No |
| WELD COUNTY PUBLIC WORKS | Minor source | No |
| WELD COUNTY PUBLIC WORKS - GEISERT PIT | Minor source | No |
| WELD COUNTY PUBLIC WORKS - HOKESTRA PIT | Minor source | No |
| WELD COUNTY PUBLIC WORKS - PETERS PIT | Minor source | No |
| WELD COUNTY PUBLIC WORKS - PIERCE NORTH | Minor source | No |
| WELD COUNTY PUBLIC WORKS (MINING DIV) | Synthetic minor source | No |
| WELD COUNTY PUBLIC WORKS-KOSKIE PIT | Minor source | No |
| WELD COUNTY T5N-R65W-S1 L01 | Minor source | No |
| WELLS CONC - WELLS DENVER PRECAST PLANT | Minor source | No |
| WELLS RANCH 33,34,43,44-36,36D,36P,36T,S | Synthetic minor source | No |
| WELLS RANCH AA35 ECONODE T6N-R63W-S35L01 | Synthetic minor source | Yes |
| WELLS TRUCKING-TIMMERMAN/WELLS PIT | Minor source | No |
| WES DJ FT LUPTON/PLATTE VALLEY/LANCASTER | Major source | Yes |
| WES DJ GATHERING - ARISTOCRAT CS | Synthetic minor source | No |
| WES DJ GATHERING - DACONO | Major source | No |
| WES DJ GATHERING - FREDERICK CS | Major source | Yes |
| WES DJ GATHERING - HAMBERT C.S. | Major source | No |
| WES DJ GATHERING - HUDSON STATION | Major source | Yes |
| WES DJ GATHERING - LATHAM GAS PLANT | Major source | No |
| WES DJ GATHERING - MEAD C.S. | Major source | No |
| WES DJ GATHERING - PLATTEVILLE CS | Major source | No |
| WES DJ GATHERING - POWARS COMP STA | Major source | No |
| WES DJ GATHERING - ST. VRAIN C.S. | Major source | No |
| WES DJ GATHERING - TRI-TOWN C.S. | Major source | No |
| WES DJ GATHERING - VOLLMAR C.S. | Major source | No |
| WES WATTENBURG - CENTRAL OIL STABIL | Major source | No |
| WEST PLAINS CO | Synthetic minor source | No |
| WESTERN OPERATING CO - SPEAKER P | Minor source | No |
| WESTERN OPERATING-HOOZEE-BJOLIN 1 | Minor source | No |
| WESTERN SUGAR | Minor source | No |
| WESTERN SUGAR - N GREELEY PILE GROUND | Minor source | No |
| WESTERN SUGAR CO | Minor source | No |
| WHITING - NELSON RANCHES | Minor source | No |
| WHITING - NELSON RANCHES A #1 & #2 | Minor source | No |
| WHITING - NELSON RANCHES A #6 & #7 | Minor source | No |
| WHITING - NELSON RANCHES C #1 | Minor source | No |
| WHITING OIL - KERN 43-33 | Minor source | No |
| WHITING OIL & GAS - RUNWAY 23-31H | Minor source | No |
| WHITING OIL&GAS - UET OIL TERMINAL | Minor source | No |
| WIEDEMAN T5N-R66W-S5 L01 | Minor source | No |
| WILLIAMS FRONT RANGE - HOOKSIDE COMPRESS | Synthetic minor source | No |
| WILLIAMS FRONT RANGE - TIGER COMPRESSOR | Synthetic minor source | No |
| WILLIAMS GILCREST - KERSEY CS | Major source | No |
| WILLIAMS GILCREST - WIEDEMAN C.S. | Minor source | No |
| WILLIAMS GILCREST- SPEER FACILITY | Synthetic minor source | No |
| WOOD GROUP USA INC - LONGMONT FACILITY | Minor source | No |
| WOOD PRODUCTS MANUFACTURING & RECYCLING, | Minor source | No |
| X10846 34002016 MAYNE/MILLER 2&7-10 O SA | Minor source | No |
| ZEN MIDSTREAM - REN COMPRESSOR STATION | Synthetic minor source | No |
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.