EPA-regulated facilities in Loudoun County, VA

There are 2,016 EPA-regulated facilities inside Loudoun County, Virginia. The most common kinds are water discharge (887), hazardous waste (594), data centers (330). 4 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 20 have a violation on record. Penalties over the last five years total $340k across 16 sites.

Open the map of Loudoun County

2,016facilities in the county

4in significant noncompliance

20with a violation on record

$340kin penalties, last 5 years

By category

Category	Facilities
Hazardous waste	594
Large quantity generators	3
Small quantity generators	423
Transporters	7
Chemical (RMP/TRI)	39
Superfund	2
Air emissions	305
Major sources	5
Synthetic minor sources	98
Minor sources	181
Water discharge	887
Major permits	3
Minor permits	795
Drinking water systems	115
Greenhouse gas reporters	4
Data centers	330
Recycling centers	1

A facility enrolled in several programs counts once in the total and once in each of its categories.

In significant noncompliance

The EPA's designation for its most serious or persistent violations, as of the latest data.

MICROSOFT CORPORATION – LEESBURG DATA CENTER (IAD01-02-03-04-05) 19935 SYCOLIN ROAD, LEESBURG, VA, 20175 Significant noncompliance
LOUDOUN COUNTY TRANSIT FACILITY 42031 LOUDOUN CENTER PL, LEESBURG, VA, 20175 Significant noncompliance
FOXCROFT SCHOOL 22407 FOXHOUND LANE, MIDDLEBURG, VA, 20117 Significant noncompliance
HILLSBORO TOWN WASTEWATER TREATMENT PACKAGE PLANT 37091 CHARLES TOWN PIKE, HILLSBORO, VA, 20132 Significant noncompliance

Largest penalties

Penalties assessed over the last five years.

COMPASS IAD DATACENTER 42254 THUNDERBALL DRIVE, LEESBURG, VA, 20175 $70k in penalties
HIWAY MOBILE HOME COMMUNITY, LLC 14489 JAMES MONROE HWY, LEESBURG, VA, 20176 $70k in penalties
ALIGNED ENERGY DATA CENTERS (ASHBURN), LLC 21890 UUNET DRIVE, ASHBURN, VA, 20147 $36k in penalties
VANTAGE DATA CENTERS VA11, VA12, VA13, VA14, & VA15 45194 VANTAGE DATA PLAZA, STERLING, VA, 20166 $26k in penalties
QUANTICO NATIONAL CEMETERY 18424 JOPLIN RD, PRINCE WILLIAM COUNTY, VA, 22172 $22k in penalties

Superfund sites

SAM'S (JONES') JUNKYARD RTE 29, GAINESVILLE, VA, 22065
HIDDEN LANE LANDFILL OFF OF PERSIMMON LN, ~3/4 MILE N OF RT 7, STERLING, VA, 20165

Data centers

AMAZON DATA SERVICES INC IAD-667, IAD-668, IAD-669, IAD-670, AND IAD-671 20575 CELTIC PARK DRIVE, LEESBURG, VA, 20175
MICROSOFT CORPORATION - LEESBURG DATA CENTER 19540 COMPASS CREEK PARKWAY, LEESBURG, VA, 20175
STACK INFRASTRUCTURE - SI NVA06A LLC TBD COMPASS CREEK PARKWAY, LEESBURG, VA, 20175
HAYDEN TECHNOLOGIES, LLC. 20491 GOOSE LANDING LN, LEESBURG, VA, 20175
COMPASS IAD DATACENTER 42254 THUNDERBALL DRIVE, LEESBURG, VA, 20175 $70k in penalties
DATA CENTERS AT COMPASS CREEK WEST OF COMPASS CREEK PARKWAY AND EAST OF STATE RO, LEESBURG, VA, 20175
STACK NVA06 19275 Compass Creek Parkway SE
STACK NVA06
Microsoft Leesburg Building 1 19515 Compass Creek Parkway, Leesburg
Microsoft Leesburg Building 2 19525 Compass Creek Parkway, Leesburg

Towns in Loudoun County

Bordering counties

Reading these numbers

These are regulatory records, not measurements of pollution. Most facilities appear because they hold a permit or file reports, and most of them are compliant; a listing is not a claim that a facility has polluted anything. Compliance status and penalties are the EPA's own determinations in data retrieved Oct 9, 2026. The Data page explains where each record comes from and how it can mislead.