ZIP 20670 (Patuxent River, MD) — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
ZIP code 20670 in Patuxent River, Maryland (St. Mary'S County) has 15 EPA-tracked facilities, including 1 High-Risk sites (6.7%), 0 active violators, and $0 in federal penalties. Beyond industrial pollution, properties in ZIP 20670 are screened across 2 historical St. Mary'S County FEMA disasters, USDA Soil Foundation Shrink-Swell (MODERATE signal), Tap Water & Watershed Permits (12), and EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L).
ZIP 20670 (Patuxent River, 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 20670 (Patuxent River, MD) Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)ZIP 20670 Sector Screening Map (High-Risk Pin Coordinates Locked)
Exact street pins for 1 High-Risk and 0 Active Violation sites are redacted on public directory maps.
Regulated EPA Facilities in ZIP 20670 (Patuxent River, 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 Regulated EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • PATUXENT RIVER, MD (ZIP 20670 Sector) | MODERATE (39/100) | Resolved / Historical Non-Compliance (4 qtrs NC) | 🔒 4 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • PATUXENT RIVER, MD (ZIP 20670 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (4 qtrs NC) | 🔒 4 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • MARYLAND, MD (ZIP 20670 Sector) | MODERATE (30/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| HOLTON POND - POND #3 FREE PREVIEW (LOW RISK) | PATUXENT RIVER NAVAL AIR STATION- HOLTON POND, DISTRICT 6 (PATUXENT) ELECTION DISTRICT, MD 20670 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| P-146, MULTI MISSION MARITIME AIRCRAFT TEST FACILITIES FREE PREVIEW (LOW RISK) | PATUXENT RIVER NAVAL AIR STATION, LEXINGTON PARK, MD 20670 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
| RECYCLING CENTER FREE PREVIEW (LOW RISK) | 47226 WHALEN RD, PATUXENT RIDING, MD 20670 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
| JLASSOCIATES INC PATUXENT RIVER FREE PREVIEW (LOW RISK) | MILESTONE LANDING RD BLDG 534, PATUXENT RIVER, MD 20670 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • PATUXENT RIVER, MD (ZIP 20670 Sector) | LOW (17/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • PATUXENT RIVER, MD (ZIP 20670 Sector) | LOW (16/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 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 #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 • PATUXENT RIVER, MD (ZIP 20670 Sector) | LOW (9/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
Frequently Asked Questions — ZIP 20670 (Patuxent River, 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 20670 (Patuxent River, MD)?
ZIP code 20670 (Patuxent River, MD) contains 15 EPA-tracked facilities, of which 1 (6.7%) are classified in the High-Risk tier, 0 (0.0%) have active compliance violations, and 4 (26.7%) handle RCRA hazardous waste.
How does ZIP 20670 compare to St. Mary'S County and Maryland averages?
In ZIP 20670, 6.7% of regulated sites are rated High Risk, compared to 5.7% 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 20670?
Geologic screening places ZIP 20670 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 20670 (Patuxent River, 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 20670 to unlock the exact parcel FEMA flood zone (AE / VE / X) and mandatory flood insurance status.
Does ZIP 20670 have expansive clay soil, foundation problems, or drinking water violations?
USDA regional soil screening for ZIP 20670 indicates a MODERATE shrink-swell risk signal. Within ZIP 20670, federal registries track 3 SDWIS drinking water facilities, 9 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.