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 INC. BATTERY #10130600 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10133200 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10133700 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10134000 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10136700 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10137400 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10138700 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10139500 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10139700 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10140000 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10140200 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10140300 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10140500 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10141000 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10141100 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10141200 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10141300 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10142300 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10143600 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10143700 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10145000 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10145200 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10145300 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10145800 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10652000 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10652100 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10652800 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10654400 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10660200 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10740500 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10741100 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10771600 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10779500 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10786400 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10815300 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10815800 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10826000 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10867700 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10870800 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #10871000 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11143900 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11181900 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11301400 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11302000 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11303200 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11303500 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11306400 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11306900 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11307000 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11308000 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11309600 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11309700 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11310000 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11310100 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11312700 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11313500 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11313900 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11314300 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11315400 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11315700 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11316100 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11316200 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11317600 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11318100 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11318200 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11321100 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11324700 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11324800 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11324900 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11325300 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11325400 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11325500 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11331200 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11332300 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11332900 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11333100 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11334000 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11334400 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11334700 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11336100 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11336500 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11337800 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11338200 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11339100 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11339500 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11339800 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11340900 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11341000 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11341500 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11342200 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11343100 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11343300 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11349000 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11349200 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11349500 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11350500 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11350800 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11351300 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11351400 | Minor source | No |
| NOBLE ENERGY INC. BATTERY #11351600 | Minor source | No |
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.