Clean Air Act stationary source · ICIS-AIR VA0000005110774173
CYRUSONE STERLING IX/X/XI, Sterling, VA: Clean Air Act compliance record, inspections, violations, penalties
- OperatingOperating status
- Synthetic minor sourceEmissions classification
- No Violation IdentifiedCurrent violation status, as filed
- 5Compliance evaluations since January 1, 2017
- 0High-priority violations since January 1, 2017
- 1Formal enforcement actions since January 1, 2017
CYRUSONE STERLING IX/X/XI, at 43290 OLD OX ROAD, Sterling in Loudoun County, Virginia, is an operating synthetic 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 “No Violation Identified”. Loudoun 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 | CYRUSONE STERLING IX/X/XI |
|---|---|
| ICIS-AIR ID | VA0000005110774173 |
| EPA facility registry ID | 110070683710 |
| Operating status | Operating |
| Emissions classification | Synthetic minor source |
| Current violation status (ICIS-AIR high-priority violation field) | No Violation Identified |
| Address | 43290 OLD OX ROAD, Sterling, VA 20166 |
| County | Loudoun County |
| In a nonattainment county | Yes (EPA Green Book) |
| Industry (NAICS) | Data processing and hosting (NAICS 5182) |
| EPA region | 03 |
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 CYRUSONE STERLING IX/X/XI 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
- 5Evaluations since January 1, 2017
- 1Full compliance evaluations
| Date | What EPA recorded | Agency | Programs |
|---|---|---|---|
| May 7, 2026 | PCE Off-Site | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| May 16, 2025 | FCE On-Site | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| February 2, 2024 | PCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| December 28, 2023 | PCE Off-Site | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| October 25, 2021 | PCE On-Site | State | State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
Violations
- 2Violation 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 |
|---|---|---|---|
| March 25, 2024 | Earliest FRV determination | State | MACT Standards (40 CFR Part 63); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
| December 6, 2022 | 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 |
|---|---|---|---|
| October 7, 2024 | Administrative Order | State | $6,630 |
Informal enforcement
| Date | What EPA recorded | Agency |
|---|---|---|
| March 25, 2024 | Notice of Violation | State |
| December 6, 2022 | Notice of Violation | State |
Stack tests
- 3Stack tests since January 1, 2017
- 1Recorded as failed
| Date | What EPA recorded | Agency |
|---|---|---|
| August 9, 2024 | Pass | State |
| January 11, 2024 | Fail | State |
| October 22, 2020 | 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 110070683710 there.
Nearby on the register
- Air-emissions sources in Loudoun County
- Every source record in Loudoun County, A to Z
- Air-emissions sources in Virginia
- Every source record in Virginia, A to Z
Figures from EPA’s ICIS-AIR download, loaded September 14, 2026.