St. Marys County, Maryland — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in St. Marys County, MD?
In St. Marys County, Maryland, public U.S. EPA records track 26 regulated facilities (#40 of 50 in Maryland), including 3 (11.5%) High-Risk sites and $0 in federal penalties. Countywide due diligence also covers 0 Safe Drinking Water (SDWIS) facilities, 17 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. Marys 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. Marys County, MD Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in St. Marys County
ZIP Codes in St. Marys County
Top EPA Regulated Facilities in St. Marys 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 High-Risk EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • MECHANICSVILLE, MD (ZIP 20659 Sector) | HIGH (64/100) | Significant Violation (5 qtrs NC) | 🔒 5 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • LEXINGTON PARK, MD (ZIP 20653 Sector) | HIGH (64/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • LEXINGTON PARK, MD (ZIP 20653 Sector) | MODERATE (47/100) | Violation Identified (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • GREAT MILLS, MD (ZIP 20634 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • CHARLOTTE HALL, MD (ZIP 20622 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (8 qtrs NC) | 🔒 8 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • CALLAWAY, MD (ZIP 20620 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 • LEONARDTOWN, MD (ZIP 20650 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 • LEXINGTON PARK, MD (ZIP 20653 Sector) | MODERATE (30/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| CHANEY PHYSICAL THERAPY FREE PREVIEW (LOW RISK) | 26045 SOTTERLEY HEIGHTS ROAD, HOLLYWOOD, MD 20636 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
| CHAMPION USED AUTO PARTS, LLC FREE PREVIEW (LOW RISK) | 45864 USHER LANE, GREAT MILLS, MD 20634 | LOW (17/100) | Unknown (0 qtrs NC) | $0 |
| SOUTHERN MARYLAND USED AUTO PARTS FREE PREVIEW (LOW RISK) | 26470 THREE NOTCH RD, MECHANICSVILLE, MD 20659 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| DR. JAMES FORREST CAREER AND FREE PREVIEW (LOW RISK) | 24005 POINT LOOKOUT, LEONARDTOWN, MD 20650 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — St. Marys County, Maryland Environmental Due Diligence
How many EPA-regulated environmental sites are in St. Marys County, Maryland?
Public U.S. EPA records track 26 regulated facilities in St. Marys County, Maryland (ranking #40 of 50 jurisdictions in MD). Of those, 3 (11.5%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 4 (15.4%) have active non-compliance quarters.
Which ZIP codes and cities in St. Marys County have the highest regulated facility density?
Within St. Marys County, the highest concentrations of EPA-tracked facilities are located in ZIP 20634 (Great Mills, 23 sites), ZIP 20628 (Dameron, 2 sites), spanning municipal corridors including Great Mills (23 sites), Dameron (1 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in St. Marys County?
Across St. Marys County, 3 facilities (11.5% 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. Marys County, MD?
Geologic indoor air screening places St. Marys 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. Marys County, MD?
Federal records track 0 Safe Drinking Water (SDWIS) facilities, 17 Clean Water Act NPDES permits, and 12 impaired water dischargers in St. Marys County, alongside 2 historical FEMA federal disaster declarations (1 flood/storm events).
Does St. Marys County, MD have expansive clay soil or foundation risk?
USDA regional soil engineering screening for St. Marys 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.