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 - KALLAS T4N-R65W-S4 L01 | Minor source | No |
| NOBLE ENERGY - KARLBERG ST T7N-R65W-S36 | Minor source | No |
| NOBLE ENERGY - KAUFMAN T4N-R65W-S8 L01 | Minor source | No |
| NOBLE ENERGY - KAWATA L02 | Minor source | No |
| NOBLE ENERGY - KEHN USX T6N-R63W-S1 L01 | Minor source | No |
| NOBLE ENERGY - KEHN USX T7N-R63W-S35 L01 | Minor source | No |
| NOBLE ENERGY - KEISER T5N-R65W-S33 L01 | Minor source | No |
| NOBLE ENERGY - KEISHA WHITE WOODY ABBEY | Minor source | No |
| NOBLE ENERGY - KELLER T2N-R64W-S20 L01 | Minor source | No |
| NOBLE ENERGY - KEOTA GAS PLANT | Synthetic minor source | No |
| NOBLE ENERGY - KEOTA T9N-R60W-S27 L01 | Minor source | No |
| NOBLE ENERGY - KERN T8N-R63W-8S L01 | Minor source | No |
| NOBLE ENERGY - KILDOW T4N-R64W-S31 L01 | Minor source | No |
| NOBLE ENERGY - KISSLER T4N-R64W-S23 L02 | Minor source | No |
| NOBLE ENERGY - KISSLER T4N-R66W-S21 L01 | Minor source | No |
| NOBLE ENERGY - KISSLER T4N-R66W-S21 L04 | Minor source | No |
| NOBLE ENERGY - KLEIN | Minor source | No |
| NOBLE ENERGY - KLEIN HANSCOME T4N-R65W-S | Synthetic minor source | No |
| NOBLE ENERGY - KLINGENBERG | Minor source | No |
| NOBLE ENERGY - KNAUB L01 | Minor source | No |
| NOBLE ENERGY - KNAUB STROHAUER | Minor source | No |
| NOBLE ENERGY - KNAUB T4N-R65W-S4 L01 | Minor source | No |
| NOBLE ENERGY - KNAUB T4N-R65W-S9 L02 | Minor source | No |
| NOBLE ENERGY - KNAUS D T6N-R66W-S28 L01 | Minor source | No |
| NOBLE ENERGY - KOHLER T5N-R64W-S21 L01 | Minor source | No |
| NOBLE ENERGY - KOHLHOFF | Minor source | No |
| NOBLE ENERGY - KOHLHOFF USX T7N-R64W-S17 | Minor source | No |
| NOBLE ENERGY - KRIER T9N-R61W-S25 L01 | Minor source | No |
| NOBLE ENERGY - KRIER T9N-R61W-S26 L01 | Minor source | No |
| NOBLE ENERGY - KROPP RUZICANO SILVERMAN | Minor source | No |
| NOBLE ENERGY - KUMMER T8N-R61W-S23 L02 | Minor source | No |
| NOBLE ENERGY - KUMMER T8N-R61W-S23 L03 | Minor source | No |
| NOBLE ENERGY - KYLE WHITE ESTES RHINO HI | Minor source | No |
| NOBLE ENERGY - LAND RURAL T4N-R65W-S31 L | Minor source | No |
| NOBLE ENERGY - LANG STOCKLEY SATER T4N-R | Minor source | No |
| NOBLE ENERGY - LANG T7N-R64W-S35 L01 | Minor source | No |
| NOBLE ENERGY - LAPP A13 ECONODE T6N-R64W | Synthetic minor source | No |
| NOBLE ENERGY - LAPP T6N-R64W-S13 L01 | Minor source | No |
| NOBLE ENERGY - LAPP T6N-R64W-S13 L02 | Minor source | No |
| NOBLE ENERGY - LARIMER LEZIN L01 | Minor source | No |
| NOBLE ENERGY - LARSON | Minor source | No |
| NOBLE ENERGY - LARSON AA19 ECONODE T6N-R | Minor source | No |
| NOBLE ENERGY - LARSON FAIRMEADOWS | Not applicable | No |
| NOBLE ENERGY - LARSON USX T6N-R63W-S19 L | Minor source | No |
| NOBLE ENERGY - LC11-15 ECONODE T9N-R63W- | Synthetic minor source | No |
| NOBLE ENERGY - LC22-A ECONODE T9N-R59W-S | Major source | No |
| NOBLE ENERGY - LC24-6 ECONODE T9N-R59W-S | Synthetic minor source | No |
| NOBLE ENERGY - LC25 ECONODE T9N-59W-S25 | Synthetic minor source | No |
| NOBLE ENERGY - LC34 ECONODE T9N-R59W-S34 | Synthetic minor source | No |
| NOBLE ENERGY - LD01 & LD12 ECONODE GEN I | Minor source | No |
| NOBLE ENERGY - LD02 ECONODE GEN 1 HYBRID | Synthetic minor source | No |
| NOBLE ENERGY - LD22-A ECONODE T9N-R58W-S | Synthetic minor source | No |
| NOBLE ENERGY - LDS L03 | Minor source | No |
| NOBLE ENERGY - LDS SINJIN ST | Minor source | No |
| NOBLE ENERGY - LDS T3N-R64W-S5 L01 | Minor source | No |
| NOBLE ENERGY - LDS T6N-R65W-S25 L01 | Minor source | No |
| NOBLE ENERGY - LDS T6N-R65W-S34 L01 | Minor source | No |
| NOBLE ENERGY - LDS T6N-R65W-S36 L01 | Minor source | No |
| NOBLE ENERGY - LDS WHITE SEAN L01 | Minor source | No |
| NOBLE ENERGY - LEE BOIKO L01T4N-R65W-S15 | Minor source | No |
| NOBLE ENERGY - LEE T4N-R65W-S10 L01 | Minor source | No |
| NOBLE ENERGY - LEHAN T4N-R65W-S8 L02 | Minor source | No |
| NOBLE ENERGY - LEHAN T4N-R65W-S8 L03 | Minor source | No |
| NOBLE ENERGY - LEHAN WCL | Minor source | No |
| NOBLE ENERGY - LEHAN WCL T4N-R65W-S5 L01 | Minor source | No |
| NOBLE ENERGY - LEHFELD #11341200 | Minor source | No |
| NOBLE ENERGY - LENGEL T4N-R65W-S16 L01 | Minor source | No |
| NOBLE ENERGY - LEONARD HANSCOME L01 | Minor source | No |
| NOBLE ENERGY - LEONARD NOVACEK T4N-R64W- | Minor source | No |
| NOBLE ENERGY - LESSER T5N-R66W-S33 L03 | Minor source | No |
| NOBLE ENERGY - LETTERLY T7N-R64W-S23 L01 | Minor source | No |
| NOBLE ENERGY - LETTERLY USX | Minor source | No |
| NOBLE ENERGY - LETTERLY USX T7N-R64W-S23 | Minor source | No |
| NOBLE ENERGY - LEWIS SCHMIDT T4N-R66W-S2 | Minor source | No |
| NOBLE ENERGY - LEWIS SCHMIDT T4N-R66W-S2 | Minor source | No |
| NOBLE ENERGY - LF RANCH GUTTERSEN USX | Minor source | No |
| NOBLE ENERGY - LF RANCH GUTTERSEN USX L3 | Minor source | No |
| NOBLE ENERGY - LIGGETT T4N-R63W-S18 L01 | Minor source | No |
| NOBLE ENERGY - LILLI SCREW | Minor source | No |
| NOBLE ENERGY - LILLI UNIT 10-6, 16-6 | Minor source | No |
| NOBLE ENERGY - LILLI UNIT G T8N-R59W-S12 | Minor source | No |
| NOBLE ENERGY - LILLI UNIT O L01 | Minor source | No |
| NOBLE ENERGY - LILLI UNIT P T8N-R58W-S7 | Minor source | No |
| NOBLE ENERGY - LILLI UNIT T8N-R58W-S3 L0 | Minor source | No |
| NOBLE ENERGY - LILLI UNIT T8N-R59W-S1 | Minor source | No |
| NOBLE ENERGY - LINDSAY | Minor source | No |
| NOBLE ENERGY - LINDSAY L04 | Minor source | No |
| NOBLE ENERGY - LINDSAY T4N-R64W-S33 L01 | Minor source | No |
| NOBLE ENERGY - LINDSAY T4N-R64W-S33 L03 | Minor source | No |
| NOBLE ENERGY - LJS HOUNDSKEEPER T3N-R65W | Minor source | No |
| NOBLE ENERGY - LOLOFF | Minor source | No |
| NOBLE ENERGY - LOLOFF STROH L01 | Minor source | No |
| NOBLE ENERGY - LOPRESTO T4N-R66W-S2 L01 | Minor source | No |
| NOBLE ENERGY - LOUSTALET JOHNSON | Minor source | No |
| NOBLE ENERGY - LOUSTALET T4N-R64W-S30 | Minor source | No |
| NOBLE ENERGY - LOVELACE T7N-R63W-S32 L01 | Minor source | No |
| NOBLE ENERGY - LOWER LATHAM T4N-R65W-S2 | Minor source | No |
| NOBLE ENERGY - LOWER LATHAM T4N-R65W-S2 | Minor source | No |
| NOBLE ENERGY - LOWER LATHAM T5N-R65W-S34 | Minor source | No |
| NOBLE ENERGY - LOWER LATHAM T5N-R65W-S35 | Minor source | No |
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.