St. Tammany County, Louisiana — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in St. Tammany County, LA?
In St. Tammany County, Louisiana, public U.S. EPA records track 138 regulated facilities (#67 of 137 in Louisiana), including 5 (3.6%) High-Risk sites and $40,000 in federal penalties. Countywide due diligence also covers 18 Safe Drinking Water (SDWIS) facilities, 105 Clean Water NPDES permits, 11 FEMA Federal Disaster Declarations (8 flood/storm), USDA Soil Foundation Shrink-Swell (MODERATE signal), and EPA Zone 3 — Low Potential (< 2.0 pCi/L).
St. Tammany County, LA 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 St. Tammany County, LA Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)Municipalities in St. Tammany County
ZIP Codes in St. Tammany County
Top EPA Regulated Facilities in St. Tammany County, LA
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 • COVINGTON, LA (ZIP 70433 Sector) | HIGH (64/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • COVINGTON, LA (ZIP 00000 Sector) | HIGH (64/100) | Significant Violation (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • COVINGTON, LA (ZIP 70433 Sector) | HIGH (64/100) | Significant Violation (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • MANDEVILLE, LA (ZIP 70470 Sector) | HIGH (64/100) | Significant Violation (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • COVINGTON, LA (ZIP 70433 Sector) | MODERATE (35/100) | Violation Identified (10 qtrs NC) | 🔒 10 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • BUSH, LA (ZIP 70431 Sector) | MODERATE (32/100) | No Violation Identified (0 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • COVINGTON, LA (ZIP 70433 Sector) | MODERATE (32/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • MADISONVILLE, LA (ZIP 70447 Sector) | MODERATE (30/100) | Inactive (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| LAFARGE MID ATLANTIC SLIDELL RMX FREE PREVIEW (LOW RISK) | 150 INDUSTRIAL DR, SLIDELL, LA 70460 | LOW (24/100) | No Violation Identified (0 qtrs NC) | $0 |
| MACKENZIE TRANSITION LLC - MACKENZIE COMPANY FREE PREVIEW (LOW RISK) | 78015 CHEMICAL RD, BUSH, LA 70431 | LOW (23/100) | No Violation Identified (0 qtrs NC) | $0 |
| MEDCATH STP FREE PREVIEW (LOW RISK) | 64030 LA HWY 434, LACOMBE, LA 70445 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
| PALMETTO GREEN FREE PREVIEW (LOW RISK) | EMERALD FOREST BLVD, COVINGTON, LA 70000 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — St. Tammany County, Louisiana Environmental Due Diligence
How many EPA-regulated environmental sites are in St. Tammany Parish County, Louisiana?
Public U.S. EPA records track 138 regulated facilities in St. Tammany Parish County, Louisiana (ranking #67 of 137 jurisdictions in LA). Of those, 5 (3.6%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 8 (5.8%) have active non-compliance quarters.
Which ZIP codes and cities in St. Tammany Parish County have the highest regulated facility density?
Within St. Tammany Parish County, the highest concentrations of EPA-tracked facilities are located in local postal sectors, spanning municipal corridors including Sun City (1 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in St. Tammany Parish County?
Across St. Tammany Parish County, 6 facilities (4.3% 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. Tammany Parish County, LA?
Geologic indoor air screening places St. Tammany Parish County in EPA Zone 3 — Low Potential (< 2.0 pCi/L). Counties in EPA Radon Zone 3 have a predicted average indoor radon level below 2.0 pCi/L, indicating lower regional geologic radon risk.
How many drinking water systems (SDWIS), impaired water bodies, and FEMA flood disasters are recorded in St. Tammany Parish County, LA?
Federal records track 18 Safe Drinking Water (SDWIS) facilities, 105 Clean Water Act NPDES permits, and 26 impaired water dischargers in St. Tammany Parish County, alongside 11 historical FEMA federal disaster declarations (8 flood/storm events).
Does St. Tammany County, LA have expansive clay soil or foundation risk?
USDA regional soil engineering screening for St. Tammany County indicates a MODERATE shrink-swell risk signal and steel pipe corrosivity rated High. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.