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 |
|---|---|---|
| PDC ENERGY - MILLER G J 33-24 | Minor source | No |
| PDC ENERGY - MITANI 14-6 | Minor source | No |
| PDC ENERGY - MOJACK I,J,K,L,M,N,O,P-28HN | Synthetic minor source | No |
| PDC ENERGY - MONFORT 4-19 | Minor source | No |
| PDC ENERGY - MONFORT WESTERN PC | Minor source | No |
| PDC ENERGY - MONSON 13, 14-20 D | Minor source | No |
| PDC ENERGY - MOODY 31, 32, 41, 42-32D | Minor source | No |
| PDC ENERGY - MOSSBERG J 31-27 & 8-31 | Minor source | No |
| PDC ENERGY - MOSSBERG T5N-R66W-S28 L04 | Minor source | No |
| PDC ENERGY - MOSSBERG T5N-R66W-S30 L02 | Minor source | No |
| PDC ENERGY - MOSSBERG T5N-R66W-S30 L03 | Minor source | No |
| PDC ENERGY - MOSSBERG UP 2, 7-31 | Minor source | No |
| PDC ENERGY - MTD-MAGNUSON 23 SEC HZ | Minor source | No |
| PDC ENERGY - NATIONAL HOG FARM 14-9 | Minor source | No |
| PDC ENERGY - NATIONAL HOG FARM 41, 42-17 | Minor source | No |
| PDC ENERGY - NC FARMS 9,10,15,16,20-32 | Minor source | No |
| PDC ENERGY - NELSON 23-34 & 34K | Minor source | No |
| PDC ENERGY - NELSON K 27-63HN | Synthetic minor source | Yes |
| PDC ENERGY - NICHOLS 1 & 35-12 | Minor source | No |
| PDC ENERGY - NOFFSINGER T7N-R66W-S35 L02 | Minor source | No |
| PDC ENERGY - NORTHERN PROP 23, 24-29 | Minor source | No |
| PDC ENERGY - O INVESTMENT PROPERTIES | Minor source | No |
| PDC ENERGY - OCHSNER 5G-421 | Minor source | No |
| PDC ENERGY - OCHSNER 5O-441 | Minor source | No |
| PDC ENERGY - OLSON 13, 14, 23, 24-29 | Minor source | No |
| PDC ENERGY - OPDYKE | Minor source | No |
| PDC ENERGY - OPEL 17-2; 3, 4, 5 | Minor source | No |
| PDC ENERGY - ORR 24-; RORY 1-7I | Minor source | No |
| PDC ENERGY - ORR 33-24 | Minor source | No |
| PDC ENERGY - ORR STATE 40-36 PAD | Synthetic minor source | No |
| PDC ENERGY - OSTER MOLANDER T4N-R65W-S3 | Minor source | No |
| PDC ENERGY - OTTENHOFF 29 SEC HZ | Synthetic minor source | No |
| PDC ENERGY - OTTESEN LE PAD | Synthetic minor source | No |
| PDC ENERGY - OWEN 12-3 | Minor source | No |
| PDC ENERGY - OWENS K20-27, K17-15, K17-2 | Minor source | No |
| PDC ENERGY - OWL CREEK #13 BATTERY | Minor source | No |
| PDC ENERGY - OWL CREEK 10, 10-2 | Minor source | No |
| PDC ENERGY - OWL CREEK 7, 7-5 BATTERY | Minor source | No |
| PDC ENERGY - OWL CREEK 9 | Minor source | No |
| PDC ENERGY - P&H 22-32, 42; 22SD | Synthetic minor source | No |
| PDC ENERGY - PAPPENHEIM 12, 22-24, 32-24 | Minor source | No |
| PDC ENERGY - PAULINE 5-8 | Minor source | No |
| PDC ENERGY - PEAK 1 | Minor source | No |
| PDC ENERGY - PEAKS & PEPPLER | Minor source | No |
| PDC ENERGY - PEPPLER 17-22 | Minor source | No |
| PDC ENERGY - PEPPLER T5N-R66W-S36 L02 | Minor source | No |
| PDC ENERGY - PESCHEL SEC 20 PAD | Minor source | No |
| PDC ENERGY - PETERSON 1, 41-20 | Minor source | No |
| PDC ENERGY - PETERSON 14W-234,434;14X... | Minor source | No |
| PDC ENERGY - PETERSON 44-13 | Minor source | No |
| PDC ENERGY - PETTINGER 33, 34, 43, 44-2 | Minor source | No |
| PDC ENERGY - PFEIFFER 9-26 | Minor source | No |
| PDC ENERGY - PHARAOH 36 SEC HZ | Synthetic minor source | No |
| PDC ENERGY - PHELPS 32 SEC PAD | Minor source | No |
| PDC ENERGY - PHELPS 8-18 | Minor source | No |
| PDC ENERGY - PHILLIPS 23 | Minor source | No |
| PDC ENERGY - PHILLIPS 23-43 | Minor source | No |
| PDC ENERGY - PHILLIPS 24 | Minor source | No |
| PDC ENERGY - PIERCE CENTRAL UNIT | Minor source | No |
| PDC ENERGY - PIKES SUDEN SEC 34 PAD | Synthetic minor source | No |
| PDC ENERGY - POPE 1 | Minor source | No |
| PDC ENERGY - POPHAM 3 SEC HZ | Minor source | No |
| PDC ENERGY - POSTLE IC EAST | Minor source | No |
| PDC ENERGY - POSTLE IC WEST | Minor source | No |
| PDC ENERGY - PROSPECT VALLEY 44-33 | Minor source | No |
| PDC ENERGY - QUANTUM 14-16 | Minor source | No |
| PDC ENERGY - R MILLER 13, 23-24 | Minor source | No |
| PDC ENERGY - R&R FARMS EAST PAD | Minor source | No |
| PDC ENERGY - R&R FARMS WEST PAD | Synthetic minor source | No |
| PDC ENERGY - RAEL 34-4 2HC | Synthetic minor source | No |
| PDC ENERGY - RAINDANCE FD | Synthetic minor source | No |
| PDC ENERGY - RAISLEY 11-34 1 | Minor source | No |
| PDC ENERGY - REEMAN DE PAD | Minor source | No |
| PDC ENERGY - RENFROE WELLS | Minor source | No |
| PDC ENERGY - RICE 22-1, 2 | Minor source | No |
| PDC ENERGY - RICH 3 4-28 | Minor source | No |
| PDC ENERGY - RICKS T5N-R66W-S30 L01 | Minor source | No |
| PDC ENERGY - RIDGE STATE 17 SEC HZ | Minor source | No |
| PDC ENERGY - RIDGWAY 1 SEC HZ | Minor source | No |
| PDC ENERGY - RIFLE FALLS 1 SEC HZ | Synthetic minor source | No |
| PDC ENERGY - RIGGS 33, 34-16 | Minor source | No |
| PDC ENERGY - RIGGS 43, 44-16 | Minor source | No |
| PDC ENERGY - RITCHEY 26 PAD | Synthetic minor source | No |
| PDC ENERGY - RORY 1 | Minor source | No |
| PDC ENERGY - SACK 24-1-12HC | Minor source | No |
| PDC ENERGY - SANDAU K25-65-1HN, 66-1HN | Minor source | No |
| PDC ENERGY - SANDIN 24 SEC HZ | Synthetic minor source | No |
| PDC ENERGY - SAPPINGTON 22Q-221, 301; 22 | Minor source | No |
| PDC ENERGY - SATER 19M-243, 443; 19J-203 | Minor source | No |
| PDC ENERGY - SCHAEFER 10E-223... | Minor source | No |
| PDC ENERGY - SCHAEFER PAD | Synthetic minor source | No |
| PDC ENERGY - SCHAFER 1 | Minor source | No |
| PDC ENERGY - SCHAFER PM K16-64-1-HN | Minor source | Yes |
| PDC ENERGY - SCHANK #2, 35-6 35-20,35-21 | Minor source | No |
| PDC ENERGY - SCHANK J 35-27, 36-31 | Minor source | No |
| PDC ENERGY - SCHANK J 35-8, 35-22, 35-7 | Minor source | No |
| PDC ENERGY - SCHAUMBERG 17 SEC HZ | Synthetic minor source | No |
| PDC ENERGY - SCHMERGE 43, 44-4 | Minor source | No |
| PDC ENERGY - SCHMIDT 44-35 | Minor source | No |
| PDC ENERGY - SCHMIDT AMOCO T4N-R66W-S23 | Minor source | No |
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.