ZIP 20650 (Leonardtown, MD) — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
ZIP code 20650 in Leonardtown, Maryland (St Mary'S County) has 98 EPA-tracked facilities, including 4 High-Risk sites (4.1%), 9 active violators, and $0 in federal penalties. Beyond industrial pollution, properties in ZIP 20650 are screened across 2 historical St Mary'S County FEMA disasters, USDA Soil Foundation Shrink-Swell (MODERATE signal), Tap Water & Watershed Permits (54), and EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L).
ZIP 20650 (Leonardtown, 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 20650 (Leonardtown, MD) Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)ZIP 20650 Sector Screening Map (High-Risk Pin Coordinates Locked)
Exact street pins for 4 High-Risk and 9 Active Violation sites are redacted on public directory maps.
Regulated EPA Facilities in ZIP 20650 (Leonardtown, 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 • LEONARDTOWN, MD (ZIP 20650 Sector) | HIGH (64/100) | Significant Violation (8 qtrs NC) | 🔒 8 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • LEONARDTOWN, MD (ZIP 20650 Sector) | HIGH (64/100) | Significant Violation (8 qtrs NC) | 🔒 8 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • LEONARDTOWN, MD (ZIP 20650 Sector) | HIGH (64/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • LEONARDTOWN, MD (ZIP 20650 Sector) | HIGH (64/100) | Significant Violation (8 qtrs NC) | 🔒 8 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • LEONARDTOWN, MD (ZIP 20650 Sector) | MODERATE (39/100) | Violation Identified (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • , MD (ZIP 20650 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (8 qtrs NC) | 🔒 8 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • LEONARDTOWN, MD (ZIP 20650 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (8 qtrs NC) | 🔒 8 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • , MD (ZIP 20650 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (4 qtrs NC) | 🔒 4 Qtrs Non-Compliance • Unlock → |
| ST. MARY'S COUNTY TECHNICAL CENTER FREE PREVIEW (LOW RISK) | LEONARDTOWN ROAD, LEONARDTOWN, MD 20650 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| OYSTER SEED NURSERIES (TOWER HILL LOCATION, WYNNE LOCATION, PENNY LOCATION) FREE PREVIEW (LOW RISK) | SITE 1: 19776 TOWER HILL ROAD, LEONARDTOWN, MD 20650 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| MARYLAND STATE HIGHWAY ADMINISTRATION - LEONARDTOWN MAINTENANCE FACILITY FREE PREVIEW (LOW RISK) | 27345 POINT LOOKOUT RD, LEONARDTOWN, MD 20650 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| LEONARDTOWN MIDDLE SCHOOL FREE PREVIEW (LOW RISK) | 24015 POINT LOOKOUT RD, LEONARDTOWN, MD 20650 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — ZIP 20650 (Leonardtown, 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 20650 (Leonardtown, MD)?
ZIP code 20650 (Leonardtown, MD) contains 98 EPA-tracked facilities, of which 4 (4.1%) are classified in the High-Risk tier, 9 (9.2%) have active compliance violations, and 31 (31.6%) handle RCRA hazardous waste.
How does ZIP 20650 compare to St Mary'S County and Maryland averages?
In ZIP 20650, 4.1% of regulated sites are rated High Risk, compared to 1.0% across St Mary'S County and 1.8% statewide in Maryland.
What is the EPA Radon Zone and ASTM Phase I screening radius for ZIP 20650?
Geologic screening places ZIP 20650 in EPA Zone 2 — Moderate Potential (2.0 – 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 20650 (Leonardtown, MD) in a FEMA flood zone and what is the flood disaster history?
St Mary'S County has recorded 2 historical FEMA federal disaster declarations (1 flood, hurricane, or severe storm declarations). Run a street address scan in ZIP 20650 to unlock the exact parcel FEMA flood zone (AE / VE / X) and mandatory flood insurance status.
Does ZIP 20650 have expansive clay soil, foundation problems, or drinking water violations?
USDA regional soil screening for ZIP 20650 indicates a MODERATE shrink-swell risk signal. Within ZIP 20650, federal registries track 21 SDWIS drinking water facilities, 33 Clean Water NPDES permits, and 5 impaired water body dischargers. Unlock a full property report for exact soil LEP %, water table depth, and utility violation dockets.