ZIP 20166 (Sterling, VA) — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
ZIP code 20166 in Sterling, Virginia (Loudoun County) has 397 EPA-tracked facilities, including 5 High-Risk sites (1.3%), 5 active violators, and $73,146 in federal penalties. Beyond industrial pollution, properties in ZIP 20166 are screened across 1 historical Loudoun County FEMA disasters, USDA Soil Foundation Shrink-Swell (MODERATE signal), Tap Water & Watershed Permits (157), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
ZIP 20166 (Sterling, VA) 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 ZIP 20166 (Sterling, VA) Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)ZIP 20166 Sector Screening Map (High-Risk Pin Coordinates Locked)
Exact street pins for 5 High-Risk and 5 Active Violation sites are redacted on public directory maps.
Regulated EPA Facilities in ZIP 20166 (Sterling, 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 Score (0–100) | Compliance Status | Enforcement / Unlock |
|---|---|---|---|---|
| 🔒 Locked High-Risk EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • STERLING, VA (ZIP 20166 Sector) | HIGH (64/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • STERLING, VA (ZIP 20166 Sector) | HIGH (64/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • STERLING, VA (ZIP 20166 Sector) | HIGH (64/100) | No Violation Identified (0 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 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 #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 • STERLING, VA (ZIP 20166 Sector) | MODERATE (37/100) | Violation Identified (5 qtrs NC) | 🔒 5 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • STERLING, VA (ZIP 20166 Sector) | MODERATE (35/100) | Resolved / Historical Non-Compliance (2 qtrs NC) | 🔒 2 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • STERLING, VA (ZIP 20166 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Federal Penalty on File • Unlock → |
| AMAZON COM SERVICES LLC - DDC4 FREE PREVIEW (LOW RISK) | 44301 MERCURE CIRCLE, STERLING, VA 20166 | LOW (25/100) | No Violation Identified (0 qtrs NC) | $0 |
| CASCADES AUTO BODY INC FREE PREVIEW (LOW RISK) | 45660 WOODLAND RD, STERLING, VA 20166 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
| STONESPRINGS HOSPITAL CENTER FREE PREVIEW (LOW RISK) | 24440 STONE SPRINGS BOULEVARD, DULLES, VA 20166 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| MESSIER SERVICE AMERICA INC FREE PREVIEW (LOW RISK) | 45360 SEVERN WAY, STERLING, VA 20166 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — ZIP 20166 (Sterling, VA) EPA Dataset & Radon
DATASET: U.S. EPA ECHO • FRS • RCRAInfo • TRI (November 01, 2026)How many EPA-tracked environmental sites are in ZIP code 20166 (Sterling, VA)?
ZIP code 20166 (Sterling, VA) contains 397 EPA-tracked facilities, of which 5 (1.3%) are classified in the High-Risk tier, 5 (1.3%) have active compliance violations, and 153 (38.5%) handle RCRA hazardous waste.
How does ZIP 20166 compare to Loudoun County and Virginia averages?
In ZIP 20166, 1.3% of regulated sites are rated High Risk, compared to 0.4% across Loudoun County and 1.5% statewide in Virginia.
What is the EPA Radon Zone and ASTM Phase I screening radius for ZIP 20166?
Geologic screening places ZIP 20166 in EPA Zone 1 — High Potential (> 4.0 pCi/L). Property buyers should screen a 0.25-mile immediate buffer for vapor-intrusion sources and a 1.0-mile radius for CERCLA/RCRA sites.
Is ZIP 20166 (Sterling, VA) in a FEMA flood zone and what is the flood disaster history?
Loudoun County has recorded 1 historical FEMA federal disaster declarations (0 flood, hurricane, or severe storm declarations). Run a street address scan in ZIP 20166 to unlock the exact parcel FEMA flood zone (AE / VE / X) and mandatory flood insurance status.
Does ZIP 20166 have expansive clay soil, foundation problems, or drinking water violations?
USDA regional soil screening for ZIP 20166 indicates a MODERATE shrink-swell risk signal. Within ZIP 20166, federal registries track 1 SDWIS drinking water facilities, 156 Clean Water NPDES permits, and 53 impaired water body dischargers. Unlock a full property report for exact soil LEP %, water table depth, and utility violation dockets.