Clean Air Act stationary source · ICIS-AIR CO0000000801700253
MULL DRILLING - NWAU #2 TANK BATTERY, Cheyenne Wells 9.2 Mi. Ne Of, CO: Clean Air Act compliance record, inspections, violations, penalties
- OperatingOperating status
- Minor sourceEmissions classification
- Violation w/in 1 YearCurrent violation status, as filed
- 1Compliance evaluations since January 1, 2017
- 0High-priority violations since January 1, 2017
- 1Formal enforcement actions since January 1, 2017
MULL DRILLING - NWAU #2 TANK BATTERY, at SWSW SEC 25 T13S R43W, Cheyenne Wells 9.2 Mi. Ne Of in Cheyenne County, Colorado, is an operating minor 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”. 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 | MULL DRILLING - NWAU #2 TANK BATTERY |
|---|---|
| ICIS-AIR ID | CO0000000801700253 |
| EPA facility registry ID | 110017379576 |
| Operating status | Operating |
| Emissions classification | Minor source |
| Current violation status (ICIS-AIR high-priority violation field) | Violation w/in 1 Year |
| Address | SWSW SEC 25 T13S R43W, Cheyenne Wells 9.2 Mi. Ne Of, CO 80802 |
| County | Cheyenne County |
| In a nonattainment county | No (EPA Green Book) |
| Industry (NAICS) | Oil and gas extraction (NAICS 2111) |
| SIC code | 1311 |
| 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 MULL DRILLING - NWAU #2 TANK BATTERY 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
- 1Evaluations since January 1, 2017
- 0Full compliance evaluations
| Date | What EPA recorded | Agency | Programs |
|---|---|---|---|
| September 4, 2025 | PCE On-Site | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
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 |
|---|---|---|---|
| December 4, 2025 | Earliest FRV determination | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
Enforcement and penalties
1 formal enforcement actions since January 1, 2017, 1 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.
| Date | What EPA recorded | Agency | Penalty, as filed |
|---|---|---|---|
| July 2, 2026 | Administrative Order | State | $10,500 |
Informal enforcement
| Date | What EPA recorded | Agency |
|---|---|---|
| March 25, 2026 | Notice of Violation | State |
Stack tests
- 1Stack tests since January 1, 2017
- 0Recorded as failed
| Date | What EPA recorded | Agency |
|---|---|---|
| June 19, 2023 | 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 110017379576 there.
Nearby on the register
- Air-emissions sources in Cheyenne County
- Every source record in Cheyenne 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.