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
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 |
|---|---|---|
| NOBLE ENERGY - UPRC EPHRAIM FORD | Minor source | No |
| NOBLE ENERGY - UPRC FERGUSON | Minor source | No |
| NOBLE ENERGY - UPRC JEPSEN T4N-R65W-S21 | Minor source | No |
| NOBLE ENERGY - UPRC L01 | Minor source | No |
| NOBLE ENERGY - UPRC LANA T2N-R64W-S17 L0 | Minor source | No |
| NOBLE ENERGY - UPRC LOT T4N-R67W-S23 L01 | Minor source | No |
| NOBLE ENERGY - UPRC RUMSEY L01 | Minor source | No |
| NOBLE ENERGY - UPRC SHELTON L04 | Minor source | No |
| NOBLE ENERGY - UPRC SHELTON T3N-R65W-S1 | Minor source | No |
| NOBLE ENERGY - UPRC STROH T4N-R67W-S1 L0 | Minor source | No |
| NOBLE ENERGY - UPRC T3N R65W S23 L01 | Minor source | No |
| NOBLE ENERGY - UPRC T3N-R65W-S13 L03 | Minor source | No |
| NOBLE ENERGY - UPRC T4N-R65W-S21 L01 | Minor source | No |
| NOBLE ENERGY - UPRC T4N-R65W-S31 L01 | Minor source | No |
| NOBLE ENERGY - UPRC T4N-R65W-S7 L03 | Minor source | No |
| NOBLE ENERGY - UPRC T4N-R66W-S13 L01 | Minor source | No |
| NOBLE ENERGY - UPRC T4N-R66W-S27 L03 | Minor source | No |
| NOBLE ENERGY - UPRC T4N-R66W-S27 L04 | Minor source | No |
| NOBLE ENERGY - UPRC T4N-R66W-S33 L02 | Minor source | No |
| NOBLE ENERGY - UPRC T4N-R66W-S35 L02 | Minor source | No |
| NOBLE ENERGY - UPRC T4N-W67-S23 L01 | Minor source | No |
| NOBLE ENERGY - UPRC WALTERS #11501400 | Minor source | No |
| NOBLE ENERGY - UPRR PAN AM L01 | Minor source | No |
| NOBLE ENERGY - UPV ABBEY | Minor source | No |
| NOBLE ENERGY - UPV BOOTH T4N-R64W-S35 L1 | Minor source | No |
| NOBLE ENERGY - UPV SATER #415824072 | Minor source | No |
| NOBLE ENERGY - UPV SATER L02 | Minor source | No |
| NOBLE ENERGY - UPV SATER S23 L01 | Minor source | No |
| NOBLE ENERGY - UPV T2N-R64W-S33 L01 | Minor source | No |
| NOBLE ENERGY - UPV T4N R64W S13 L01 | Minor source | No |
| NOBLE ENERGY - UPV T5N-R63W-S5 L01 | Minor source | No |
| NOBLE ENERGY - URPC BERNHARDT #415826453 | Minor source | No |
| NOBLE ENERGY - VEGA #415823197 | Minor source | No |
| NOBLE ENERGY - VICTOR T4N-R64W-S19 L01 | Minor source | No |
| NOBLE ENERGY - VICTOR T4N-R65W-S14 L02 | Minor source | No |
| NOBLE ENERGY - VIGILANT ST T7N-R63W-S16 | Synthetic minor source | No |
| NOBLE ENERGY - VOLKENS COLEMAN | Minor source | No |
| NOBLE ENERGY - VOLKENS COLEMAN T4N-R64W | Minor source | No |
| NOBLE ENERGY - WADE T8N-R59W-S29 L01 | Minor source | No |
| NOBLE ENERGY - WAGNER WILHITE | Minor source | No |
| NOBLE ENERGY - WAHLERT AC33 ECONODE T7N- | Synthetic minor source | No |
| NOBLE ENERGY - WAHLERT T7N-R63W-S23 L01 | Minor source | No |
| NOBLE ENERGY - WALCKER T7N-R63W-S17 L02 | Minor source | No |
| NOBLE ENERGY - WALCKER T7N-R63W-S7 L01 | Minor source | No |
| NOBLE ENERGY - WALCKER T7N-R64W-S12 L01 | Minor source | No |
| NOBLE ENERGY - WALCKER USX T7N-R64W-S1 L | Minor source | No |
| NOBLE ENERGY - WALCKER USX T7N-R64W-S1 L | Minor source | No |
| NOBLE ENERGY - WALCKER USX T7N-R64W-S1 L | Minor source | No |
| NOBLE ENERGY - WALKER | Minor source | No |
| NOBLE ENERGY - WALKER L02 | Minor source | No |
| NOBLE ENERGY - WARDLAW T6N-R64W-S35 L01 | Minor source | No |
| NOBLE ENERGY - WARHIME BAY T6N-R65W-S1 L | Minor source | No |
| NOBLE ENERGY - WASHBURN T8N-R61W-S22 L01 | Minor source | No |
| NOBLE ENERGY - WASTE MGMT T3N-R64W-S35 L | Minor source | No |
| NOBLE ENERGY - WASTE MGMT T3N-R64W-S35 L | Minor source | No |
| NOBLE ENERGY - WASTE MGMT T3N-R64W-S35 L | Minor source | No |
| NOBLE ENERGY - WASTE MGMT USX L07 | Minor source | No |
| NOBLE ENERGY - WASTE MGMT USX L08 T2N-R6 | Minor source | No |
| NOBLE ENERGY - WASTE MGMT USX T2N-R64W-S | Minor source | No |
| NOBLE ENERGY - WASTE SERVICES T3N-R64W-S | Minor source | No |
| NOBLE ENERGY - WATKINS L02 | Minor source | No |
| NOBLE ENERGY - WATKINS SATER | Minor source | No |
| NOBLE ENERGY - WATKINS SATER T4N-R63W-S1 | Minor source | No |
| NOBLE ENERGY - WATKINS SATER T4N-R64W-S1 | Minor source | No |
| NOBLE ENERGY - WATKINS T4N-R64W-S12 L01 | Minor source | No |
| NOBLE ENERGY - WATKINS T4N-R64W-S13 L01 | Minor source | No |
| NOBLE ENERGY - WATSON T6N-R65W-S28 L01 | Minor source | No |
| NOBLE ENERGY - WATSON T6N-R65W-S28 L02 | Minor source | No |
| NOBLE ENERGY - WATSON T6N-R65W-S28 L03 | Minor source | No |
| NOBLE ENERGY - WAUGH PC T7N-R64W-S8 L01 | Minor source | No |
| NOBLE ENERGY - WEBER T4N-R66W-S16 L02 | Minor source | No |
| NOBLE ENERGY - WEBER T4N-R66W-S33 L01 | Minor source | No |
| NOBLE ENERGY - WEBSTER T5N-R64W-S6 L01 | Minor source | No |
| NOBLE ENERGY - WEBSTER T5N-R64W-S6 L02 | Minor source | No |
| NOBLE ENERGY - WEIDENKELLER T4N-R65W-S1 | Minor source | No |
| NOBLE ENERGY - WELCH T7N-R63W-S21 L01 | Minor source | No |
| NOBLE ENERGY - WELLS RANCH AA L01 | Minor source | No |
| NOBLE ENERGY - WELLS RANCH AA T6N-R63W-S | Minor source | No |
| NOBLE ENERGY - WELLS RANCH AA T6N-R63W-S | Minor source | No |
| NOBLE ENERGY - WELLS RANCH AA T6N-R63W-S | Minor source | No |
| NOBLE ENERGY - WELLS RANCH AA11 ECONODE | Minor source | No |
| NOBLE ENERGY - WELLS RANCH AA12, AE07 | Minor source | No |
| NOBLE ENERGY - WELLS RANCH AA14, AA16 EC | Minor source | No |
| NOBLE ENERGY - WELLS RANCH AA21 ECONODE | Synthetic minor source | No |
| NOBLE ENERGY - WELLS RANCH AA24, AA23, B | Synthetic minor source | No |
| NOBLE ENERGY - WELLS RANCH AA25 & 26 ECO | Synthetic minor source | No |
| NOBLE ENERGY - WELLS RANCH AA33 ECONODE | Synthetic minor source | No |
| NOBLE ENERGY - WELLS RANCH AE L01 | Minor source | No |
| NOBLE ENERGY - WELLS RANCH AE05, 06 ECON | Synthetic minor source | No |
| NOBLE ENERGY - WELLS RANCH AE08 ECONODE | Minor source | No |
| NOBLE ENERGY - WELLS RANCH AE20 ECONODE | Minor source | No |
| NOBLE ENERGY - WELLS RANCH BB01 & AF05 | Minor source | No |
| NOBLE ENERGY - WELLS RANCH BB11 ECONODE | Synthetic minor source | No |
| NOBLE ENERGY - WELLS RANCH CGF | Major source | No |
| NOBLE ENERGY - WELLS RANCH STATE A36 ECO | Minor source | No |
| NOBLE ENERGY - WELLS RANCH STATE BB03 | Minor source | No |
| NOBLE ENERGY - WELLS RANCH USX | Synthetic minor source | No |
| NOBLE ENERGY - WELLS RANCH USX 35-65HN | Minor source | No |
| NOBLE ENERGY - WELLS RANCH USX AA L02 | Minor source | No |
| NOBLE ENERGY - WELLS RANCH USX AA L03 | Minor source | No |
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.