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 2,615 regulated facilities (#7 of 137 in Louisiana), including 215 (8.2%) High-Risk sites and $444,661 in federal penalties. Countywide due diligence also covers 246 Safe Drinking Water (SDWIS) facilities, 2,480 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 05, 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 • MANDEVILLE, LA (ZIP 70448 Sector) | HIGH (86/100) | Significant Violation (12 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • ABITA SPRINGS, LA (ZIP 70420 Sector) | HIGH (78/100) | Significant Violation (12 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • SLIDELL, LA (ZIP 70461 Sector) | HIGH (74/100) | Significant Violation (12 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • SLIDELL, LA (ZIP 70461 Sector) | HIGH (71/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • BUSH, LA (ZIP 70000 Sector) | HIGH (70/100) | Significant Violation (9 qtrs NC) | 🔒 Federal Penalty on File • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • COVINGTON, LA (ZIP 70433 Sector) | HIGH (70/100) | Significant Violation (11 qtrs NC) | 🔒 Federal Penalty on File • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • COVINGTON, LA (ZIP 70435 Sector) | HIGH (68/100) | Significant Violation (12 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • MANDEVILLE, LA (ZIP 70471 Sector) | HIGH (67/100) | Significant Violation (8 qtrs NC) | 🔒 Federal Penalty on File • Unlock → |
| CUTURA'S PRECISION MACHINING LLC FREE PREVIEW (LOW RISK) | 37397 BEN THOMAS RD, SLIDELL, LA 70460 | LOW (24/100) | 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 County, Louisiana?
Public U.S. EPA records track 2,615 regulated facilities in St. Tammany County, Louisiana (ranking #7 of 137 jurisdictions in LA). Of those, 215 (8.2%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 363 (13.9%) have active non-compliance quarters.
Which ZIP codes and cities in St. Tammany County have the highest regulated facility density?
Within St. Tammany County, the highest concentrations of EPA-tracked facilities are located in ZIP 70471 (Mandeville, 299 sites), ZIP 70461 (Slidell, 244 sites), ZIP 70445 (Lacombe, 159 sites), spanning municipal corridors including Covington (1,063 sites), Madisonville (275 sites), Lacombe (200 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in St. Tammany County?
Across St. Tammany County, 21 facilities (0.8% 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 County, LA?
Geologic indoor air screening places St. Tammany 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 County, LA?
Federal records track 246 Safe Drinking Water (SDWIS) facilities, 2,480 Clean Water Act NPDES permits, and 1,612 impaired water dischargers in St. Tammany 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.