EPA Air · violations by county and year
High-priority air violations in Loudoun County, Virginia, 2025
- 3Violations
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. Each row below is one violation recorded against a source in Loudoun County, Virginia during 2025. A facility can appear several times: this is the year’s record of what happened, not a list of places. The sources themselves are on the Loudoun County facility page.
Loudoun County, Virginia, 2025
- Inspections 80
- Stack tests 21
High-priority air violations in Loudoun County, other years
High-priority air violations recorded in Loudoun County, Virginia, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-08-21 | COMPASS IAD DATACENTER | Earliest FRV determination | State |
| 2025-08-21 | MICROSOFT CORPORATION â LEESBURG DATA CENTER (IAD01-02-03-04-05) — high-priority violation on file | HPV day-zero determination | State |
| 2025-07-10 | VANTAGE DATA CENTERS VA11, VA12, VA13, VA14, & VA15 | Earliest FRV determination | State |
Dates as filed by the agency that recorded the violation. Figures from EPA’s ICIS-AIR download.