St. Mary S County, Maryland — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in St. Mary S County, MD?
In St. Mary S County, Maryland, public U.S. EPA records track 9 regulated facilities (#51 of 51 in Maryland), including 0 (0.0%) High-Risk sites and $0 in federal penalties. Countywide due diligence also covers 1 Safe Drinking Water (SDWIS) facilities, 0 Clean Water NPDES permits, 2 FEMA Federal Disaster Declarations (1 flood/storm), USDA Soil Foundation Shrink-Swell (MODERATE signal), and EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L).
St. Mary S County, MD 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 St. Mary S County, MD Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in St. Mary S County
ZIP Codes in St. Mary S County
Top EPA Regulated Facilities in St. Mary S County, 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 Tier & Score | Compliance Status | Enforcement / Unlock |
|---|---|---|---|---|
| 🔒 Locked Regulated EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • CALIFORNIA, MD (ZIP 20619 Sector) | MODERATE (30/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • 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 |
| 7 ELEVEN 21067 FREE PREVIEW (LOW RISK) | RTE 5 NEAR GOLDEN BEACH RD, CHARLOTTE HALL, MD 20622 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| PEEWEES USED AUTO PARTS INC FREE PREVIEW (LOW RISK) | INTERSECTION OF FLATIRON & ST GEORGES CHURCH RDS, GREAT MILLS, MD 20634 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| BODY BY DESIGN INC FREE PREVIEW (LOW RISK) | 421 MERCEDES DR, CALIFORNIA, MD 20619 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • MECHANICSVILLE, MD (ZIP 20659 Sector) | LOW (16/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • LEXINGTON PARK, MD (ZIP 20653 Sector) | LOW (15/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • LEXINGTON PARK, MD (ZIP 20653 Sector) | LOW (15/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • MECHANICSVILLE, MD (ZIP 20659 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
Frequently Asked Questions — St. Mary S County, Maryland Environmental Due Diligence
How many EPA-regulated environmental sites are in St. Mary S County, Maryland?
Public U.S. EPA records track 9 regulated facilities in St. Mary S County, Maryland (ranking #51 of 51 jurisdictions in MD). Of those, 0 (0.0%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 0 (0.0%) have active non-compliance quarters.
Which ZIP codes and cities in St. Mary S County have the highest regulated facility density?
Within St. Mary S County, the highest concentrations of EPA-tracked facilities are located in local postal sectors, spanning municipal corridors including St. Mary S.
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in St. Mary S County?
Across St. Mary S County, 8 facilities (88.9% 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 St. Mary S County, MD?
Geologic indoor air screening places St. Mary S County in EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L). Counties in EPA Radon Zone 2 have a predicted average indoor radon level between 2.0 and 4.0 pCi/L. Testing basement or ground-floor living areas is recommended during home inspection.
How many drinking water systems (SDWIS), impaired water bodies, and FEMA flood disasters are recorded in St. Mary S County, MD?
Federal records track 1 Safe Drinking Water (SDWIS) facilities, 0 Clean Water Act NPDES permits, and 0 impaired water dischargers in St. Mary S County, alongside 2 historical FEMA federal disaster declarations (1 flood/storm events).
Does St. Mary S County, MD have expansive clay soil or foundation risk?
USDA regional soil engineering screening for St. Mary S 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.