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 - FRICO HAAS MATTHEW L01 | Minor source | No |
| NOBLE ENERGY - FRICO T3N-R65W-S15 L02 | Synthetic minor source | No |
| NOBLE ENERGY - FRONT RANGE T3N-R64W-S9 L | Minor source | No |
| NOBLE ENERGY - FURROW FED T7N-R64W-S14 | Minor source | No |
| NOBLE ENERGY - FURROW USX L01 | Minor source | No |
| NOBLE ENERGY - G35 CENTENNIAL STATE ECON | Synthetic minor source | No |
| NOBLE ENERGY - GEHRING T4N-R64W-S8 L01 | Minor source | No |
| NOBLE ENERGY - GEMINI FAIRBANKS HELDT | Minor source | No |
| NOBLE ENERGY - GEMINI T4N-R66W-S1 L02 | Minor source | No |
| NOBLE ENERGY - GEMINI T4N-R66W-S1 L03 | Minor source | No |
| NOBLE ENERGY - GETZ MELCHIOR ULRICH L01 | Minor source | No |
| NOBLE ENERGY - GIBBS T5N-R65W-S28 L02 | Minor source | No |
| NOBLE ENERGY - GITTLEIN MARIE T3N-R64W-S | Synthetic minor source | No |
| NOBLE ENERGY - GOLDBERG L01 | Minor source | No |
| NOBLE ENERGY - GRAVEL DRAW T8N-R61W-S30 | Minor source | No |
| NOBLE ENERGY - GREEN USX EE T7N-R65W-S13 | Minor source | No |
| NOBLE ENERGY - GREEN USX EE T7N-R65W-S13 | Minor source | No |
| NOBLE ENERGY - GRIGSBY PC T7N-R63W-S30 L | Minor source | No |
| NOBLE ENERGY - GRIGSBY PC T7N-R63W-S30 L | Minor source | No |
| NOBLE ENERGY - GROVER C.S. | Synthetic minor source | No |
| NOBLE ENERGY - GULLICKSON ROWE JR L01 | Minor source | No |
| NOBLE ENERGY - GURTLER RUSSELL T3N-R65W- | Minor source | No |
| NOBLE ENERGY - GUTTERSEN L01 | Minor source | No |
| NOBLE ENERGY - GUTTERSEN ST T3N-R63W-S17 | Major source | No |
| NOBLE ENERGY - GUTTERSEN ST T3N-R63W-S8 | Minor source | No |
| NOBLE ENERGY - GUTTERSEN ST USX T3N-R64W | Synthetic minor source | No |
| NOBLE ENERGY - GUTTERSEN T3N-R63W-S5 L01 | Synthetic minor source | No |
| NOBLE ENERGY - GUTTERSEN USX | Minor source | No |
| NOBLE ENERGY - GUTTERSEN USX L02 | Minor source | No |
| NOBLE ENERGY - GUTTERSEN USX T3N-R63W- | Minor source | No |
| NOBLE ENERGY - GUTTERSEN/GUTTERSEN STATE | Minor source | No |
| NOBLE ENERGY - HAFFNER 41-23 | Minor source | No |
| NOBLE ENERGY - HAGEMIESTER T6N-R63W-S6 L | Minor source | No |
| NOBLE ENERGY - HAGEN T4N-R64W-S9 L01 | Minor source | No |
| NOBLE ENERGY - HANSCOME G12-31 KLEIN 12- | Minor source | No |
| NOBLE ENERGY - HANSCOME HBR T4N-R65W-S11 | Minor source | No |
| NOBLE ENERGY - HANSCOME T4N-R64W-S21 L01 | Synthetic minor source | No |
| NOBLE ENERGY - HANSCOME T4N-R64W-S28 L02 | Minor source | No |
| NOBLE ENERGY - HANSCOME T4N-R65W-S11 L01 | Minor source | No |
| NOBLE ENERGY - HANSCOME T4N-R65W-S11 L02 | Minor source | No |
| NOBLE ENERGY - HARLESS T4N-R64W-S17 L03 | Minor source | No |
| NOBLE ENERGY - HARPER T7N-R65W-S34 L01 | Minor source | No |
| NOBLE ENERGY - HARPER USX T7N-R65W-S27 L | Minor source | No |
| NOBLE ENERGY - HARPER-KONA A21 ECONODE T | Synthetic minor source | No |
| NOBLE ENERGY - HEARTLAND ST ECONODE T4N- | Synthetic minor source | No |
| NOBLE ENERGY - HEARTLAND STATE ECONODE | Minor source | No |
| NOBLE ENERGY - HEINZE USX L01 | Minor source | No |
| NOBLE ENERGY - HENRY T4N-R65W-S5 L01 | Minor source | No |
| NOBLE ENERGY - HEPPBERGER T5N-R65W-S24 L | Minor source | No |
| NOBLE ENERGY - HERBST | Minor source | No |
| NOBLE ENERGY - HERBST DARLENE DINNEL | Minor source | No |
| NOBLE ENERGY - HERBST VROOMAN T4N-R64W-S | Minor source | No |
| NOBLE ENERGY - HETTINGER ADAMS T3N-R64W- | Minor source | No |
| NOBLE ENERGY - HOEW USX #11716800 | Minor source | No |
| NOBLE ENERGY - HOFF AMEN T3N-R64W-S6 L01 | Minor source | No |
| NOBLE ENERGY - HOFFMAN | Synthetic minor source | No |
| NOBLE ENERGY - HOFFNER L01 | Minor source | No |
| NOBLE ENERGY - HOFFNER L02 | Minor source | No |
| NOBLE ENERGY - HOLMAN COCKROFT T5N-R64W- | Minor source | No |
| NOBLE ENERGY - HOLMAN T5N-R64W-S14 L01 | Minor source | No |
| NOBLE ENERGY - HOWARD L01 | Minor source | No |
| NOBLE ENERGY - HOWARD L02 | Minor source | No |
| NOBLE ENERGY - HOWARD USX | Minor source | No |
| NOBLE ENERGY - HOWARD USX T6N-R64W-S9 L0 | Minor source | No |
| NOBLE ENERGY - HOWARD USX T6N-R64W-S9 L0 | Synthetic minor source | No |
| NOBLE ENERGY - HSR BRENLY RENICK L01 | Minor source | No |
| NOBLE ENERGY - HSR GUTTERSEN A T3N-R64W | Minor source | No |
| NOBLE ENERGY - HSR KINZER | Minor source | No |
| NOBLE ENERGY - HSR MIKE GUTTERSEN WEEKS | Minor source | No |
| NOBLE ENERGY - HSR SHABLE HINDE VANDLEN | Minor source | No |
| NOBLE ENERGY - HSR WALDBAUM WILLENBORG | Minor source | No |
| NOBLE ENERGY - HULLABALOO Y16-28-A ECONO | Synthetic minor source | No |
| NOBLE ENERGY - HUNGENBERG WATSON L02 | Minor source | No |
| NOBLE ENERGY - HUNGENBERG WATSON T6N-R65 | Minor source | No |
| NOBLE ENERGY - HUNT T8N-R60W-S19 L01 | Minor source | No |
| NOBLE ENERGY - HUNTSMAN L01 | Minor source | No |
| NOBLE ENERGY - HURLEY H26-11-A ECONODE T | Minor source | No |
| NOBLE ENERGY - IGO CREEK PC T9N-R58W-S16 | Minor source | No |
| NOBLE ENERGY - INDEPENDENCE D19-01-A T3N | Minor source | No |
| NOBLE ENERGY - IRVINE T6N-R65W-S2 L01 | Minor source | No |
| NOBLE ENERGY - J L FARMS T6N-R63W-S20 L0 | Minor source | No |
| NOBLE ENERGY - J L FARMS T6N-R63W-S20 L0 | Synthetic minor source | No |
| NOBLE ENERGY - JASMINE T7N-R63W-S21 L01 | Minor source | No |
| NOBLE ENERGY - JEPSEN DINNER T4N-R66W-S1 | Minor source | No |
| NOBLE ENERGY - JEPSEN T3N-R65W-S2 L01 | Minor source | No |
| NOBLE ENERGY - JEPSEN T3N-R65W-S2 L02 | Minor source | No |
| NOBLE ENERGY - JEPSEN T3N-R65W-S2 L03 | Minor source | No |
| NOBLE ENERGY - JEPSEN T3N-R65W-S2 L04 | Minor source | No |
| NOBLE ENERGY - JERKE OSTER T4N-R65W-S15 | Minor source | No |
| NOBLE ENERGY - JERKE T4N-R65W-S7 L01 | Minor source | No |
| NOBLE ENERGY - JOHNSON MARK ALTER AMANDA | Minor source | No |
| NOBLE ENERGY - JOHNSON ROBERTSON REIS UP | Synthetic minor source | No |
| NOBLE ENERGY - JOHNSON T4N-R65W-S12 L01 | Minor source | No |
| NOBLE ENERGY - JOHNSON T6N-R65W-S22 L02 | Minor source | No |
| NOBLE ENERGY - JOHNSON T7N-R65W-S33 L01 | Minor source | No |
| NOBLE ENERGY - JOHNSON UPRC L01 | Minor source | No |
| NOBLE ENERGY - JOHNSON VERN T4N-R64W-S9 | Minor source | No |
| NOBLE ENERGY - JOHNSTON LYMAN T4N-R64W-S | Minor source | No |
| NOBLE ENERGY - JONES T7N-R63W-S5 L01 | Minor source | No |
| NOBLE ENERGY - JONES T7N-R63W-S6 L01 | Minor source | No |
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.