Loudoun County, Virginia — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Loudoun County, VA?
In Loudoun County, Virginia, public U.S. EPA records track 935 regulated facilities (#6 of 257 in Virginia), including 4 (0.4%) High-Risk sites and $100,328 in federal penalties. Countywide due diligence also covers 87 Safe Drinking Water (SDWIS) facilities, 518 Clean Water NPDES permits, 1 FEMA Federal Disaster Declarations (0 flood/storm), USDA Soil Foundation Shrink-Swell (MODERATE signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Loudoun County, VA 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Loudoun County, VA Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)Municipalities in Loudoun County
ZIP Codes in Loudoun County
Top EPA Regulated Facilities in Loudoun County, VA
100% of High-Risk & penalized facilities have facility names, street names, and dockets redacted (3 Low-Risk compliant records shown as Free Previews).
| Facility Name / Hazard Type | Sector Location (Street Redacted) | Risk Tier & Score | Compliance Status | Enforcement / Unlock |
|---|---|---|---|---|
| 🔒 Locked High-Risk EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • MIDDLEBURG, VA (ZIP 20117 Sector) | HIGH (64/100) | Significant Violation (6 qtrs NC) | 🔒 6 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • LEESBURG, VA (ZIP 20176 Sector) | MODERATE (51/100) | Resolved / Historical Non-Compliance (8 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • STERLING, VA (ZIP 20166 Sector) | MODERATE (49/100) | Violation Identified (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • CHANTILLY, VA (ZIP 20152 Sector) | MODERATE (45/100) | Violation Identified (6 qtrs NC) | 🔒 6 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • STERLING, VA (ZIP 20166 Sector) | MODERATE (44/100) | Violation Identified (10 qtrs NC) | 🔒 10 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • PURCELLVILLE, VA (ZIP 20132 Sector) | MODERATE (43/100) | Violation Identified (2 qtrs NC) | 🔒 2 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • ROUND HILL, VA (ZIP 20142 Sector) | MODERATE (39/100) | Violation Identified (8 qtrs NC) | 🔒 8 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • LEESBURG, VA (ZIP 20176 Sector) | MODERATE (37/100) | Violation Identified (6 qtrs NC) | 🔒 6 Qtrs Non-Compliance • Unlock → |
| NORTHROP GRUMMAN CORPORATION AVIATION DIVISION IAD FREE PREVIEW (LOW RISK) | 44760 COCKPIT COURT, DULLES, VA 20166 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| ADVANCE AUTO PARTS #3761 FREE PREVIEW (LOW RISK) | 316-A EAST MARKET STREET, LEESBURG, VA 20176 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| EXPLUS INC FREE PREVIEW (LOW RISK) | 44156 MERCURE CIRCLE, STERLING, VA 20166 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| LCPS - TUSCARORA HIGH SCHOOL FREE PREVIEW (LOW RISK) | 801 N. KING STREET, LEESBURG, VA 20176 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Loudoun County, Virginia Environmental Due Diligence
How many EPA-regulated environmental sites are in Loudoun County, Virginia?
Public U.S. EPA records track 935 regulated facilities in Loudoun County, Virginia (ranking #6 of 257 jurisdictions in VA). Of those, 4 (0.4%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 13 (1.4%) have active non-compliance quarters.
Which ZIP codes and cities in Loudoun County have the highest regulated facility density?
Within Loudoun County, the highest concentrations of EPA-tracked facilities are located in ZIP 20166 (Sterling, 397 sites), ZIP 20176 (Leesburg, 129 sites), ZIP 20164 (Sterling, 105 sites), spanning municipal corridors including Sterling (463 sites), Leesburg (382 sites), Ashburn (284 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Loudoun County?
Across Loudoun County, 592 facilities (63.3% of regulated sites) are registered Resource Conservation and Recovery Act (RCRA) hazardous waste generators or handlers, and 0 industrial sites report toxic chemical releases to the EPA Toxics Release Inventory (TRI).
What is the EPA Radon Zone classification for Loudoun County, VA?
Geologic indoor air screening places Loudoun County in EPA Zone 1 — High Potential (> 4.0 pCi/L). Counties in EPA Radon Zone 1 have a predicted average indoor radon screening level greater than 4.0 pCi/L (the EPA action threshold). Short-term or continuous indoor radon testing is strongly recommended prior to closing.
How many drinking water systems (SDWIS), impaired water bodies, and FEMA flood disasters are recorded in Loudoun County, VA?
Federal records track 87 Safe Drinking Water (SDWIS) facilities, 518 Clean Water Act NPDES permits, and 143 impaired water dischargers in Loudoun County, alongside 1 historical FEMA federal disaster declarations (0 flood/storm events).
Does Loudoun County, VA have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Loudoun County indicates a MODERATE shrink-swell risk signal and steel pipe corrosivity rated Moderate. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.