ZIP 20818 (Cabin John, MD) — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
ZIP code 20818 in Cabin John, Maryland (Montgomery County) has 8 EPA-tracked facilities, including 0 High-Risk sites (0.0%), 0 active violators, and $0 in federal penalties. Beyond industrial pollution, properties in ZIP 20818 are screened across 1 historical Montgomery County FEMA disasters, USDA Soil Foundation Shrink-Swell (MODERATE signal), Tap Water & Watershed Permits (1), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
ZIP 20818 (Cabin John, 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 20818 (Cabin John, MD) Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)ZIP 20818 Sector Screening Map (High-Risk Pin Coordinates Locked)
Exact street pins for 0 High-Risk and 0 Active Violation sites are redacted on public directory maps.
Regulated EPA Facilities in ZIP 20818 (Cabin John, 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 |
|---|---|---|---|---|
| PALISADES SWIMMING POOL FREE PREVIEW (LOW RISK) | 6918 SEVEN LOCKS ROAD, CABIN JOHN, MD 20818 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| MDOT SHA BRIDGE #1510100 FREE PREVIEW (LOW RISK) | I-495 RAMP OVER CLARA BARTON PKWAY EBR & C&O CANAL, CABIN JOHN, MD 20818 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| WSSC- CABIN JOHN ELEVATED TANK FREE PREVIEW (LOW RISK) | 6711 TOMLINSON TERRACE, CABIN JOHN, MD 20818 | LOW (15/100) | No Violation Identified (0 qtrs NC) | $0 |
| SHA BRIDGE 1508600 FREE PREVIEW (LOW RISK) | I-4958X SB OVER CABIN JOHN CRE, CABIN JOHN, MD 20818 | LOW (15/100) | No Violation Identified (0 qtrs NC) | $0 |
| 🔒 Locked Regulated EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • CABIN JOHN, MD (ZIP 20818 Sector) | LOW (13/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
Frequently Asked Questions — ZIP 20818 (Cabin John, 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 20818 (Cabin John, MD)?
ZIP code 20818 (Cabin John, MD) contains 8 EPA-tracked facilities, of which 0 (0.0%) are classified in the High-Risk tier, 0 (0.0%) have active compliance violations, and 6 (75.0%) handle RCRA hazardous waste.
How does ZIP 20818 compare to Montgomery County and Maryland averages?
In ZIP 20818, 0.0% 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 20818?
Geologic screening places ZIP 20818 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 20818 (Cabin John, 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 20818 to unlock the exact parcel FEMA flood zone (AE / VE / X) and mandatory flood insurance status.
Does ZIP 20818 have expansive clay soil, foundation problems, or drinking water violations?
USDA regional soil screening for ZIP 20818 indicates a MODERATE shrink-swell risk signal. Within ZIP 20818, federal registries track 0 SDWIS drinking water facilities, 1 Clean Water NPDES permits, and 1 impaired water body dischargers. Unlock a full property report for exact soil LEP %, water table depth, and utility violation dockets.