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 - WELLS RANCH USX AA11-67HN | Synthetic minor source | No |
| NOBLE ENERGY - WELLS RANCH USX AE | Minor source | No |
| NOBLE ENERGY - WELLS RANCH USX AE L02 | Minor source | No |
| NOBLE ENERGY - WELLS RANCH USX AE L02 | Minor source | No |
| NOBLE ENERGY - WELLS RANCH USX AE L03 | Minor source | No |
| NOBLE ENERGY - WELLS RANCH USX AE L04 | Synthetic minor source | No |
| NOBLE ENERGY - WELLS RANCH USX AE T6N-R6 | Minor source | No |
| NOBLE ENERGY - WELLS RANCH USX AE T6N-R6 | Minor source | No |
| NOBLE ENERGY - WELLS RANCH USX AE T6N-R6 | Minor source | No |
| NOBLE ENERGY - WELLS RANCH USX AE T6N-R6 | Synthetic minor source | No |
| NOBLE ENERGY - WELLS RANCH USX BB 11-23 | Minor source | No |
| NOBLE ENERGY - WELLS RANCH USX BB L06 | Minor source | No |
| NOBLE ENERGY - WELLS T5N-R63W-S11 L01 | Minor source | No |
| NOBLE ENERGY - WERTZ FED T4N-R66W-S12 L1 | Minor source | No |
| NOBLE ENERGY - WEST IRRIGATION USX L01 | Minor source | No |
| NOBLE ENERGY - WIEDEMAN #20-20 | Minor source | No |
| NOBLE ENERGY - WIEDEMAN T5N-R66W-S28 L01 | Minor source | No |
| NOBLE ENERGY - WIEDEMAN T5N-R66W-S28 LO2 | Minor source | No |
| NOBLE ENERGY - WILCOX L01 | Minor source | No |
| NOBLE ENERGY - WILD HORSE T9N-R61W-S28 L | Minor source | No |
| NOBLE ENERGY - WILKINSON T6N-R65W-S1 L01 | Minor source | No |
| NOBLE ENERGY - WILMOTH BUROUGH T4N-R64W- | Minor source | No |
| NOBLE ENERGY - WILMOTH T4N-R64W-S14 L01 | Minor source | No |
| NOBLE ENERGY - WILMOTH T4N-R64W-S14 L03 | Minor source | No |
| NOBLE ENERGY - WILSON T6N-R63W-S18 L01 | Minor source | No |
| NOBLE ENERGY - WILSON T7N-R63W-S20 L01 | Minor source | No |
| NOBLE ENERGY - WINTERS T5N-R65W-S3 L01 | Minor source | No |
| NOBLE ENERGY - WOLFE USX T4N-R63W-S7 L01 | Minor source | No |
| NOBLE ENERGY - WOLFE USX T4N-R63W-S7 L02 | Minor source | No |
| NOBLE ENERGY - WOLFPACK LONEWOLF B02 ECO | Minor source | No |
| NOBLE ENERGY - WPF CARLSON T6N-R64W-S18 | Minor source | No |
| NOBLE ENERGY - WYSCAVER USX L01 | Minor source | No |
| NOBLE ENERGY - Y11 WASTE MANAGEMENT ECON | Synthetic minor source | No |
| NOBLE ENERGY - ZABKA T5N-R65W-S2 L01 | Minor source | No |
| NOBLE ENERGY - ZACH C BOOTH | Minor source | No |
| NOBLE ENERGY - ZIGGY USX T7N-R64W-S19 L0 | Minor source | No |
| NOBLE ENERGY - ZIONS WIEST T5N-R66W-S28 | Minor source | No |
| NOBLE ENERGY -BASHOR ST T6N-R63W-S16 L02 | Minor source | No |
| NOBLE ENERGY -CORNELIUS T3N-R65W-S11L01 | Minor source | No |
| NOBLE ENERGY -GABEL USX T7N-R64W-S21 L01 | Minor source | No |
| NOBLE ENERGY -SHOEMAKER T6N-R64W-S12 L02 | Synthetic minor source | No |
| NOBLE ENERGY -SHOEMAKER T6N-R64W-S12 L03 | Synthetic minor source | No |
| NOBLE ENERGY -WELLS RANCH AF L03 | Synthetic minor source | No |
| NOBLE ENERGY -WIEDEMAN T4N-R66W-S28 L03 | Minor source | No |
| NOBLE ENERGY BATTERY # 61717200 | Minor source | No |
| NOBLE ENERGY INC - BATTERY 415809046 | Minor source | No |
| NOBLE ENERGY INC - BATTERY 415809669 | Minor source | No |
| NOBLE ENERGY INC - BATTERY 415809924 | Minor source | No |
| NOBLE ENERGY INC - BATTERY 415810106 | Minor source | No |
| NOBLE ENERGY INC - BATTERY 415810648 | Minor source | No |
| NOBLE ENERGY INC - BATTERY 415811353 | Minor source | No |
| NOBLE ENERGY INC - BATTERY 415811603 | Minor source | No |
| NOBLE ENERGY INC - BATTERY 415812011 | Minor source | No |
| NOBLE ENERGY INC - BATTERY 415812777 | Minor source | No |
| NOBLE ENERGY INC - BATTERY 415812778 | Minor source | No |
| NOBLE ENERGY INC - BATTERY 415813372 | Minor source | No |
| NOBLE ENERGY INC - BATTERY 415813373 | Minor source | No |
| NOBLE ENERGY INC - BATTERY 415813785 | Minor source | No |
| NOBLE ENERGY INC - DP431-432-446 JOHNSON | Minor source | No |
| NOBLE ENERGY INC - SCHMIDT #10059100 | Minor source | No |
| NOBLE ENERGY INC #116663 WAS #116129 | Minor source | No |
| NOBLE ENERGY INC BATTERY # 100104 | Minor source | No |
| NOBLE ENERGY INC BATTERY #10016500 | Minor source | No |
| NOBLE ENERGY INC BATTERY #10023000 | Minor source | No |
| NOBLE ENERGY INC BATTERY #10076000 | Minor source | No |
| NOBLE ENERGY INC BATTERY #10090000 | Minor source | No |
| NOBLE ENERGY INC BATTERY #10091500 | Minor source | No |
| NOBLE ENERGY INC BATTERY #10137900 | Minor source | No |
| NOBLE ENERGY INC BATTERY #10791800 | Minor source | No |
| NOBLE ENERGY INC BATTERY #11383000 | Minor source | No |
| NOBLE ENERGY INC BATTERY #414445212 | Minor source | No |
| NOBLE ENERGY INC BATTERY #415663718 | Minor source | No |
| NOBLE ENERGY INC BATTERY #415663919 | Minor source | No |
| NOBLE ENERGY INC BATTERY #415664180 | Minor source | No |
| NOBLE ENERGY INC BATTERY #415664462 | Minor source | No |
| NOBLE ENERGY INC BATTERY #415664464 | Minor source | No |
| NOBLE ENERGY INC BATTERY #415666097 | Minor source | No |
| NOBLE ENERGY INC BATTERY #415666756 | Minor source | No |
| NOBLE ENERGY INC BATTERY #415669247 | Minor source | No |
| NOBLE ENERGY INC BATTERY #415674181 | Minor source | No |
| NOBLE ENERGY INC BATTERY #415674184 | Minor source | No |
| NOBLE ENERGY INC BATTERY #415674185 | Minor source | No |
| NOBLE ENERGY INC BATTERY #415674266 | Minor source | No |
| NOBLE ENERGY INC BATTERY #415674392 | Minor source | No |
| NOBLE ENERGY INC. - SANDAU BARTLES L01 | Minor source | No |
| NOBLE ENERGY INC. - WATKINS 18-02, ETC. | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10004100 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10006000 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10007800 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10010200 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10010300 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10010800 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10012200 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10012500 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10012600 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10013200 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10013300 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10013400 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10014800 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10015000 | Minor source | No |
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.