ZIP 20878 (Gaithersburg, MD) — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
ZIP code 20878 in Gaithersburg, Maryland (Montgomery County) has 174 EPA-tracked facilities, including 1 High-Risk sites (0.6%), 3 active violators, and $0 in federal penalties. Beyond industrial pollution, properties in ZIP 20878 are screened across 1 historical Montgomery County FEMA disasters, USDA Soil Foundation Shrink-Swell (MODERATE signal), Tap Water & Watershed Permits (39), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
ZIP 20878 (Gaithersburg, MD) 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 ZIP 20878 (Gaithersburg, MD) Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)ZIP 20878 Sector Screening Map (High-Risk Pin Coordinates Locked)
Exact street pins for 1 High-Risk and 3 Active Violation sites are redacted on public directory maps.
Regulated EPA Facilities in ZIP 20878 (Gaithersburg, MD)
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 • GAITHERSBURG, MD (ZIP 20878 Sector) | HIGH (64/100) | Significant Violation (8 qtrs NC) | 🔒 8 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • GAITHERSBURG, MD (ZIP 20878 Sector) | MODERATE (44/100) | Violation Identified (5 qtrs NC) | 🔒 5 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • , MD (ZIP 20878 Sector) | MODERATE (35/100) | Violation Identified (10 qtrs NC) | 🔒 10 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • GAITHERSBURG, MD (ZIP 20878 Sector) | MODERATE (33/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • GAITHERSBURG, MD (ZIP 20878 Sector) | MODERATE (30/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • GAITHERSBURG, MD (ZIP 20878 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (4 qtrs NC) | 🔒 4 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • GAITHERSBURG, MD (ZIP 20878 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (2 qtrs NC) | 🔒 2 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • GAITHERSBURG, MD (ZIP 20878 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (3 qtrs NC) | 🔒 3 Qtrs Non-Compliance • Unlock → |
| FIELDS ROAD ELEMENTARY SCHOOL FREE PREVIEW (LOW RISK) | 1 SCHOOL DRIVE, GAITHERSBURG, MD 20878 | LOW (25/100) | No Violation Identified (0 qtrs NC) | $0 |
| LGC CLINICAL DIAGNOSTICS, INC. FREE PREVIEW (LOW RISK) | 910 CLOPPER RD, STE 150S, GAITHERSBURG, MD 20878 | LOW (24/100) | No Violation Identified (0 qtrs NC) | $0 |
| GENETIC THERAPY INC TECH PARK FREE PREVIEW (LOW RISK) | 938 CLOPPER ROAD, GAITHERSBURG, MD 20878 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
| WELLSTAT BIOLOGIES FREE PREVIEW (LOW RISK) | 930 CLOPPER RD., GAITHERSBURG, MD 20878 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — ZIP 20878 (Gaithersburg, MD) EPA Dataset & Radon
DATASET: U.S. EPA ECHO • FRS • RCRAInfo • TRI (November 01, 2026)How many EPA-tracked environmental sites are in ZIP code 20878 (Gaithersburg, MD)?
ZIP code 20878 (Gaithersburg, MD) contains 174 EPA-tracked facilities, of which 1 (0.6%) are classified in the High-Risk tier, 3 (1.7%) have active compliance violations, and 120 (69.0%) handle RCRA hazardous waste.
How does ZIP 20878 compare to Montgomery County and Maryland averages?
In ZIP 20878, 0.6% of regulated sites are rated High Risk, compared to 1.2% across Montgomery County and 1.8% statewide in Maryland.
What is the EPA Radon Zone and ASTM Phase I screening radius for ZIP 20878?
Geologic screening places ZIP 20878 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 20878 (Gaithersburg, MD) in a FEMA flood zone and what is the flood disaster history?
Montgomery County has recorded 1 historical FEMA federal disaster declarations (0 flood, hurricane, or severe storm declarations). Run a street address scan in ZIP 20878 to unlock the exact parcel FEMA flood zone (AE / VE / X) and mandatory flood insurance status.
Does ZIP 20878 have expansive clay soil, foundation problems, or drinking water violations?
USDA regional soil screening for ZIP 20878 indicates a MODERATE shrink-swell risk signal. Within ZIP 20878, federal registries track 6 SDWIS drinking water facilities, 33 Clean Water NPDES permits, and 29 impaired water body dischargers. Unlock a full property report for exact soil LEP %, water table depth, and utility violation dockets.