Clean Air Act stationary source · ICIS-AIR CO0000000812300051
COLORADO INTERSTATE GAS CO - CHEYENNE CS, Nunn 14.8 Mi. N Of, CO: Clean Air Act compliance record, inspections, violations, penalties
- OperatingOperating status
- Major sourceEmissions classification
- Violation w/in 1 YearCurrent violation status, as filed
- 10Compliance evaluations since January 1, 2017
- 0High-priority violations since January 1, 2017
- 0Formal enforcement actions since January 1, 2017
COLORADO INTERSTATE GAS CO - CHEYENNE CS, at SEC 5 T11N R66W, Nunn 14.8 Mi. N Of in Weld County, Colorado, is an operating major source of air pollution on EPA’s ICIS-AIR register. EPA’s file records its current violation status (ICIS-AIR’s high-priority violation field) as “Violation w/in 1 Year”. Weld County is on EPA’s Green Book list of areas that do not meet a national air quality standard. The status and classification are as EPA’s facility file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the source’s current standing, quarter by quarter.
Identity
| Facility as filed | COLORADO INTERSTATE GAS CO - CHEYENNE CS |
|---|---|
| ICIS-AIR ID | CO0000000812300051 |
| EPA facility registry ID | 110002395792 |
| Operating status | Operating |
| Emissions classification | Major source |
| Current violation status (ICIS-AIR high-priority violation field) | Violation w/in 1 Year |
| Address | SEC 5 T11N R66W, Nunn 14.8 Mi. N Of, CO 80612 |
| County | Weld County |
| In a nonattainment county | Yes (EPA Green Book) |
| Industry (NAICS) | Pipeline transportation (NAICS 4862) |
| SIC code | 4922 |
| EPA region | 08 |
Cited to the EPA ICIS-AIR facility file (ECHO download).
Programs and pollutants
Velarion’s copy of EPA’s ICIS-AIR download does not include its program, pollutant and Title V certification files, so this page does not list the Clean Air Act programs COLORADO INTERSTATE GAS CO - CHEYENNE CS is under or the pollutants it is permitted for. The programs each evaluation and violation below was recorded under are shown with it. EPA’s free Detailed Facility Report lists both.
Compliance evaluations
- 10Evaluations since January 1, 2017
- 8Full compliance evaluations
| Date | What EPA recorded | Agency | Programs |
|---|---|---|---|
| October 14, 2025 | FCE On-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| December 11, 2024 | FCE On-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| February 29, 2024 | PCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| February 14, 2023 | FCE On-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| February 16, 2022 | FCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| February 9, 2021 | FCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| December 11, 2019 | FCE On-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| January 31, 2019 | FCE On-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| August 22, 2018 | PCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| August 15, 2017 | FCE On-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
Violations
- 1Violation determinations since January 1, 2017
- 0Of them high-priority
A high-priority violation (HPV) is the most serious class of Clean Air Act non-compliance an agency records; a federally reportable violation (FRV) is the next step down. Each row is one determination as EPA’s violation history files it.
| Date | What EPA recorded | Agency | Programs |
|---|---|---|---|
| January 14, 2026 | Earliest FRV determination | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; Prevention of Significant Deterioration of Air Quality; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
Enforcement and penalties
0 formal enforcement actions since January 1, 2017, 0 of them with a penalty filed above zero. Each penalty is shown as EPA’s formal action file states it; “Not stated” means the file gives no figure, and $0 is a disclosed zero.
Informal enforcement
| Date | What EPA recorded | Agency |
|---|---|---|
| August 3, 2026 | Notice of Violation | State |
Stack tests
- 16Stack tests since January 1, 2017
- 0Recorded as failed
| Date | What EPA recorded | Agency |
|---|---|---|
| October 30, 2025 | Pass | State |
| October 29, 2025 | Pass | State |
| October 28, 2025 | Pass | State |
| March 19, 2025 | Pass | State |
| March 18, 2025 | Pass | State |
| October 24, 2024 | Pass | State |
| October 22, 2024 | Pass | State |
| May 10, 2023 | Pass | State |
| May 9, 2023 | Pass | State |
| March 22, 2021 | Pass | State |
| March 22, 2021 | Pass | State |
| October 15, 2020 | Pass | State |
| March 11, 2020 | Pass | State |
| March 10, 2020 | Pass | State |
| August 27, 2019 | Pass | State |
| July 30, 2019 | Pass | State |
Cited to the EPA ICIS-AIR evaluation, violation, stack test and enforcement files (ECHO download), events dated January 1, 2017 or later as loaded; up to 50 rows of each shown, newest first.
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How we handle your data → Privacy
EPA publishes a free Detailed Facility Report for every source on ECHO: its compliance status quarter by quarter, its evaluations, and its violations, enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter EPA facility registry ID 110002395792 there.
Nearby on the register
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- Every source record in Weld County, A to Z
- Air-emissions sources in Colorado
- Every source record in Colorado, A to Z
Figures from EPA’s ICIS-AIR download, loaded September 14, 2026.