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 |
|---|---|---|
| NOBLE ENERGY, INC. - 415860810 | Minor source | No |
| NOBLE ENERGY, INC. - 415860813 | Minor source | No |
| NOBLE ENERGY, INC. - 415860814 | Minor source | No |
| NOBLE ENERGY, INC. - 415860822 | Minor source | No |
| NOBLE ENERGY, INC. - 415860825 | Minor source | No |
| NOBLE ENERGY, INC. - 415860833 | Minor source | No |
| NOBLE ENERGY, INC. - 415860835 | Minor source | No |
| NOBLE ENERGY, INC. - 415860839 | Minor source | No |
| NOBLE ENERGY, INC. - 415860849 | Minor source | No |
| NOBLE ENERGY, INC. - 415860852 | Minor source | No |
| NOBLE ENERGY, INC. - 415860855 | Minor source | No |
| NOBLE ENERGY, INC. - 415860862 | Minor source | No |
| NOBLE ENERGY, INC. - 415860868 | Minor source | No |
| NOBLE ENERGY, INC. - 415860869 | Minor source | No |
| NOBLE ENERGY, INC. - 415860871 | Minor source | No |
| NOBLE ENERGY, INC. - 415860872 | Minor source | No |
| NOBLE ENERGY, INC. - 415860879 | Minor source | No |
| NOBLE ENERGY, INC. - 415860886 | Minor source | No |
| NOBLE ENERGY, INC. - 415860887 | Minor source | No |
| NOBLE ENERGY, INC. - 415860893 | Minor source | No |
| NOBLE ENERGY, INC. - 415860897 | Minor source | No |
| NOBLE ENERGY, INC. - 415860899 | Minor source | No |
| NOBLE ENERGY, INC. - 415860902 | Minor source | No |
| NOBLE ENERGY, INC. - 415860908 | Minor source | No |
| NOBLE ENERGY, INC. - 415860913 | Minor source | No |
| NOBLE ENERGY, INC. - 415860918 | Minor source | No |
| NOBLE ENERGY, INC. - 415860922 DUNCAN | Minor source | No |
| NOBLE ENERGY, INC. - 415860924 | Minor source | No |
| NOBLE ENERGY, INC. - 415860926 | Minor source | No |
| NOBLE ENERGY, INC. - 415860934 | Minor source | No |
| NOBLE ENERGY, INC. - 415860935 | Minor source | No |
| NOBLE ENERGY, INC. - 415860948 | Minor source | No |
| NOBLE ENERGY, INC. - 415860952 | Minor source | No |
| NOBLE ENERGY, INC. - 415860954 | Minor source | No |
| NOBLE ENERGY, INC. - 415860960 | Minor source | No |
| NOBLE ENERGY, INC. - 415860961 | Minor source | No |
| NOBLE ENERGY, INC. - 415860963 | Minor source | No |
| NOBLE ENERGY, INC. - 415860968 | Minor source | No |
| NOBLE ENERGY, INC. - 415860970 | Minor source | No |
| NOBLE ENERGY, INC. - 415860971 | Minor source | No |
| NOBLE ENERGY, INC. - 415860972 | Minor source | No |
| NOBLE ENERGY, INC. - 415860979 | Minor source | No |
| NOBLE ENERGY, INC. - 415860980 | Minor source | No |
| NOBLE ENERGY, INC. - 415860985 | Minor source | No |
| NOBLE ENERGY, INC. - 415860988 | Minor source | No |
| NOBLE ENERGY, INC. - 415860993 | Minor source | No |
| NOBLE ENERGY, INC. - 415860995 | Minor source | No |
| NOBLE ENERGY, INC. - 415861006 | Minor source | No |
| NOBLE ENERGY, INC. - 415861008 | Minor source | No |
| NOBLE ENERGY, INC. - 415861017 | Minor source | No |
| NOBLE ENERGY, INC. - 415861022 | Minor source | No |
| NOBLE ENERGY, INC. - 415861023 | Minor source | No |
| NOBLE ENERGY, INC. - 415861026 | Minor source | No |
| NOBLE ENERGY, INC. - 415861030 | Minor source | No |
| NOBLE ENERGY, INC. - 415861031 | Minor source | No |
| NOBLE ENERGY, INC. - 415861037 | Minor source | No |
| NOBLE ENERGY, INC. - 415861040 | Minor source | No |
| NOBLE ENERGY, INC. - 415861041 | Minor source | No |
| NOBLE ENERGY, INC. - 415863020 | Minor source | No |
| NOBLE ENERGY, INC. - 415863047 | Minor source | No |
| NOBLE ENERGY, INC. - 415863048 | Minor source | No |
| NOBLE ENERGY, INC. - 415863049 | Minor source | No |
| NOBLE ENERGY, INC. - BATT # 113988 | Minor source | No |
| NOBLE ENERGY, INC. - BATT # 115399 | Minor source | No |
| NOBLE ENERGY, INC. - BATT # 115520 | Minor source | No |
| NOBLE ENERGY, INC. - BATT # 11591200 | Minor source | No |
| NOBLE ENERGY, INC. - BATT # 117186 | Minor source | No |
| NOBLE ENERGY, INC. - BATT # 117352 | Minor source | No |
| NOBLE ENERGY, INC. - BATT # 117382 | Minor source | No |
| NOBLE ENERGY, INC. - BATT # 118282 | Minor source | No |
| NOBLE ENERGY, INC. - BATT # 11828700 | Minor source | No |
| NOBLE ENERGY, INC. - BATT # 415663396 | Minor source | No |
| NOBLE ENERGY, INC. - BATT # 915899 | Minor source | No |
| NOBLE ENERGY, INC. - BATT # 92566067 | Minor source | No |
| NOBLE ENERGY, INC. - BATT # 92566224 | Minor source | No |
| NOBLE ENERGY, INC. - BATT #117167 | Minor source | No |
| NOBLE ENERGY, INC. - BATT #905672 | Minor source | No |
| NOBLE ENERGY, INC. - BATT #915520 | Minor source | No |
| NOBLE ENERGY, INC. - BATT# 105672 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY # 113753 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY # 11557300 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY # 116963 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY # 117281 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY # 11738900 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY # 415697710 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY # 415698950 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY # 415703341 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY # 415704972 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY # 613190 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY # 900062 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY # 900309 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY # 91555000 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY # 91719000 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY #10085400 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY #11323200 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY #11377600 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY #11540500 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY #415704974 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY #415771598 | Minor source | No |
| NOBLE ENERGY, INC. - BATTERY #415801476 | Minor source | No |
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.