EPA Air · by county
Air-emissions sources in Larimer County, Colorado
- 236Facilities
Every stationary source in Larimer 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.
Every source’s record in Larimer County
Each of the 231 operating major, synthetic minor and minor sources in Larimer County, Colorado has a record page: every source in Larimer County, A to Z.
By emissions classification in Larimer 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.
Inspections in Larimer 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 10
- 2025 inspections 27
- 2024 inspections 35
- 2023 inspections 27
- 2022 inspections 32
- 2021 inspections 30
- 2020 inspections 34
- 2019 inspections 25
- 2018 inspections 28
- 2017 inspections 26
Violations in Larimer 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.
Stack tests in Larimer County, by year
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
- 2025 stack tests 7
- 2024 stack tests 3
- 2023 stack tests 5
- 2022 stack tests 5
- 2021 stack tests 3
- 2020 stack tests 3
- 2018 stack tests 3
- 2017 stack tests 8
Inspections in Larimer County, year by year · Violations in Larimer County, year by year · Stack tests in Larimer County, year by year
Other counties in Colorado
Every county in the state with at least three sources on file.
- Gilpin County 8
- Grand County 38
- Gunnison County 41
- Huerfano County 26
- Jackson County 45
- Jefferson County 373
- Kiowa County 48
- Kit Carson County 22
- La Plata County 320
- Lake County 14
- Las Animas County 599
- Lincoln County 102
- Logan County 63
- Mesa County 314
- Moffat County 334
- Montezuma County 49
- Montrose County 65
- Morgan County 61
- Otero County 40
Facilities
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.
What this page shows
This page covers Clean Air Act facilities in the EPA air register for Larimer county, CO. It lists 236 facilities in Larimer county, including 5 major sources.