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 13 regulated facilities (#46 of 50 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, 10 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 • CHARLOTTE HALL, MD (ZIP 20622 Sector) | MODERATE (37/100) | Violation Identified (10 qtrs NC) | 🔒 10 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • MECHANICSVILLE, MD (ZIP 20659 Sector) | MODERATE (33/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • CHARLOTTE HALL, MD (ZIP 20622 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| WASTE MANAGEMENT OF MARYLAND - SOUTHERN MARYLAND FREE PREVIEW (LOW RISK) | 44459 ST. ANDREWS CHURCH RD, CALIFORNIA, MD 20619 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| ST. MARY'S FOUR WHEEL DRIVE, INC. (TRICK TRUCKS V) FREE PREVIEW (LOW RISK) | LEXINGTON PARK, LEXINGTON PARK, MD 20653 | LOW (13/100) | No Violation Identified (0 qtrs NC) | $0 |
| STOLTZFUS 2 S&G FREE PREVIEW (LOW RISK) | 28645 THOMPSON CORNER ROAD, MECHANICSVILLE, MD 20659 | LOW (12/100) | No Violation Identified (0 qtrs NC) | $0 |
| WINSTEAD PIT FREE PREVIEW (LOW RISK) | 27535 THOMPSON CORNER, MECHANICSVILLE, MD 20659 | LOW (12/100) | No Violation Identified (0 qtrs NC) | $0 |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • LEONARDTOWN, MD (ZIP 20650 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • LEONARDTOWN, MD (ZIP 20650 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • MECHANICSVILLE, MD (ZIP 20659 Sector) | LOW (11/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • PATUXENT RIVER, MD (ZIP 20670 Sector) | LOW (11/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • LEXINGTON PARK, MD (ZIP 20653 Sector) | LOW (9/100) | 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 County, Maryland?
Public U.S. EPA records track 13 regulated facilities in St. Mary'S County County, Maryland (ranking #46 of 50 jurisdictions in MD). Of those, 0 (0.0%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 1 (7.7%) have active non-compliance quarters.
Which ZIP codes and cities in St. Mary'S County County have the highest regulated facility density?
Within St. Mary'S County County, the highest concentrations of EPA-tracked facilities are located in local postal sectors, spanning municipal corridors including St. Mary'S County.
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in St. Mary'S County County?
Across St. Mary'S County County, 0 facilities (0.0% 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 County, MD?
Geologic indoor air screening places St. Mary'S County 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 County, MD?
Federal records track 1 Safe Drinking Water (SDWIS) facilities, 10 Clean Water Act NPDES permits, and 2 impaired water dischargers in St. Mary'S County 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.