ZIP 20646 (La Plata, MD) — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
ZIP code 20646 in La Plata, Maryland (Charles County) has 168 EPA-tracked facilities, including 5 High-Risk sites (3.0%), 9 active violators, and $17,600 in federal penalties. Beyond industrial pollution, properties in ZIP 20646 are screened across 1 historical Charles County FEMA disasters, USDA Soil Foundation Shrink-Swell (MODERATE signal), Tap Water & Watershed Permits (98), and EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L).
ZIP 20646 (La Plata, 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 20646 (La Plata, MD) Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)ZIP 20646 Sector Screening Map (High-Risk Pin Coordinates Locked)
Exact street pins for 5 High-Risk and 9 Active Violation sites are redacted on public directory maps.
Regulated EPA Facilities in ZIP 20646 (La Plata, 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 • LA PLATA, MD (ZIP 20646 Sector) | HIGH (66/100) | Significant Violation (3 qtrs NC) | 🔒 3 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • LA PLATA, MD (ZIP 20646 Sector) | HIGH (65/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • LA PLATA, MD (ZIP 20646 Sector) | HIGH (64/100) | Violation Identified (12 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • PORT TOBACCO, MD (ZIP 20646 Sector) | HIGH (64/100) | Significant Violation (8 qtrs NC) | 🔒 8 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • LA PLATA, MD (ZIP 20646 Sector) | MODERATE (39/100) | Violation Identified (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • LAPLATA, MD (ZIP 20646 Sector) | MODERATE (38/100) | Violation Identified (5 qtrs NC) | 🔒 5 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • , MD (ZIP 20646 Sector) | MODERATE (36/100) | Violation Identified (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • LA PLATA, MD (ZIP 20646 Sector) | MODERATE (36/100) | Violation Identified (3 qtrs NC) | 🔒 3 Qtrs Non-Compliance • Unlock → |
| CHARLES COUNTY BD.OF EDUCATION FREE PREVIEW (LOW RISK) | 5980 RADIO STATION ROAD, LA PLATA, MD 20646 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
| MS4 CHARLES COUNTY FREE PREVIEW (LOW RISK) | P.O. BOX B, LA PLATA, MD 20646 | LOW (19/100) | Unknown (0 qtrs NC) | $0 |
| FAMILY DOLLAR #2986 FREE PREVIEW (LOW RISK) | 104 DRURY LN, LA PLATA, MD 20646 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| PETCO STORE #2739 FREE PREVIEW (LOW RISK) | 19 SHINING WILLOW WAY, LA PLATA, MD 20646 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — ZIP 20646 (La Plata, 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 20646 (La Plata, MD)?
ZIP code 20646 (La Plata, MD) contains 168 EPA-tracked facilities, of which 5 (3.0%) are classified in the High-Risk tier, 9 (5.4%) have active compliance violations, and 40 (23.8%) handle RCRA hazardous waste.
How does ZIP 20646 compare to Charles County and Maryland averages?
In ZIP 20646, 3.0% of regulated sites are rated High Risk, compared to 2.9% across Charles County and 1.8% statewide in Maryland.
What is the EPA Radon Zone and ASTM Phase I screening radius for ZIP 20646?
Geologic screening places ZIP 20646 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 20646 (La Plata, MD) in a FEMA flood zone and what is the flood disaster history?
Charles County has recorded 1 historical FEMA federal disaster declarations (0 flood, hurricane, or severe storm declarations). Run a street address scan in ZIP 20646 to unlock the exact parcel FEMA flood zone (AE / VE / X) and mandatory flood insurance status.
Does ZIP 20646 have expansive clay soil, foundation problems, or drinking water violations?
USDA regional soil screening for ZIP 20646 indicates a MODERATE shrink-swell risk signal. Within ZIP 20646, federal registries track 67 SDWIS drinking water facilities, 31 Clean Water NPDES permits, and 25 impaired water body dischargers. Unlock a full property report for exact soil LEP %, water table depth, and utility violation dockets.