ZIP 78666 (San Marcos, TX) — Property Value, Rent, Schools, Flood, Soil & EPA Report
Is ZIP 78666 (San Marcos, TX) a High-Risk Area & What Are Local Home Values?
ZIP code 78666 in San Marcos, Texas (Hays County) tracks 501 EPA-regulated sites (4 High-Risk, 0.8%), 4 FEMA county disaster declarations, and a MODERATE USDA soil foundation signal. Local U.S. Census & HUD benchmarks report a $154,100 median home value (+40.9% 5-yr FHFA appreciation) and $1,480/mo 2-BR Fair Market Rent, with 15 nearby K–12 schools.
| ZIP 78666 (San Marcos, TX) Benchmark | Verified Local Figure | Intelligence Category |
|---|---|---|
| Median Home Value / 5-Yr Appreciation | $154,100 (+40.9% 5-Yr Trend) | Valuation & Appreciation Index |
| 2-Bedroom Fair Market Rent Benchmark | $1,480 / month (3-BR: $1,880/mo) | Rental Yield & Cap-Rate Index |
| Regulated Sites & High-Risk Facilities | 501 sites (4 High-Risk • $517,093 penalties) | Environmental & Compliance Audit |
| Flood Disaster History & Soil Shrink-Swell | 4 Flood/Storm Disasters • MODERATE Soil Risk | Flood & Foundation Stability |
| K–12 Schools (3 Mi) & Walkability Score | 15 K–12 Schools • 8.3 / 20.0 Walk Score • Fire 0.27 mi | Schools, Transit & Fire Access |
ZIP 78666 (San Marcos, TX) 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 ZIP 78666 (San Marcos, TX) Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)ZIP 78666 Sector Screening Map (High-Risk Pin Coordinates Locked)
Exact street pins for 4 High-Risk and 6 Active Violation sites are redacted on public directory maps.
Regulated EPA Facilities in ZIP 78666 (San Marcos, TX)
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 • SAN MARCOS, TX (ZIP 78666 Sector) | HIGH (83/100) | Significant Violation (10 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • SAN MARCOS, TX (ZIP 78666 Sector) | HIGH (64/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • SAN MARCOS, TX (ZIP 78666 Sector) | HIGH (64/100) | Significant Violation (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • SAN MARCOS, TX (ZIP 78666 Sector) | MODERATE (50/100) | Violation (9 qtrs NC) | 🔒 9 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • SAN MARCOS, TX (ZIP 78666 Sector) | MODERATE (42/100) | No Violation Identified (0 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • SAN MARCOS, TX (ZIP 78666 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • SAN MARCOS, TX (ZIP 78666 Sector) | MODERATE (33/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • SAN MARCOS, TX (ZIP 78666 Sector) | MODERATE (31/100) | No Violation Identified (0 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| PARKVIEW METAL PRODUCTS FREE PREVIEW (LOW RISK) | 400 BARNES DR., SAN MARCOS, TX 78666 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| RS USED OIL SERVICES INC FREE PREVIEW (LOW RISK) | 2061 CLOVIS BARKER DRIVE, SAN MARCOS, TX 78666 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| ELECTROSOURCE FREE PREVIEW (LOW RISK) | 2809 IH-35 S, SAN MARCOS, TX 78666 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| CFAN FREE PREVIEW (LOW RISK) | 1000 TECHNOLOGY WAY, SAN MARCOS, TX 78666 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — ZIP 78666 (San Marcos, TX) EPA Dataset & Radon
DATASET: U.S. EPA ECHO • FRS • RCRAInfo • TRI (November 05, 2026)What is the home value, appreciation, and Fair Market Rent in ZIP 78666 (San Marcos, TX)?
In ZIP 78666 (San Marcos, TX), U.S. Census & HUD benchmarks show a median home value of $154,100, 5-year FHFA home price appreciation of +40.9%, and a HUD 2-Bedroom Small Area Fair Market Rent of $1,480/month.
How many EPA-tracked environmental sites are in ZIP code 78666 (San Marcos, TX)?
ZIP code 78666 (San Marcos, TX) contains 501 EPA-tracked facilities, of which 4 (0.8%) are classified in the High-Risk tier, 6 (1.2%) have active compliance violations, and 77 (15.4%) handle RCRA hazardous waste.
Is ZIP 78666 (San Marcos, TX) in a FEMA flood zone and what is the soil foundation risk?
Hays County has recorded 4 historical FEMA disaster declarations (1 flood/storm events), and USDA regional soil screening indicates a MODERATE shrink-swell foundation signal. Run an exact street-address scan to unlock parcel Flood Zone (AE/VE/X) and Soil LEP %.
How many schools, fire stations, and walkability options are near ZIP 78666?
Within 3 miles of the ZIP 78666 center, federal NCES & USGS registries index 15 public, charter, and private K–12 campuses, nearest fire/EMS station at 0.27 mi, and an EPA National Walkability Score of 8.3/20.0.
Does ZIP 78666 have drinking water (SDWIS) permits or EPA radon risk?
Geologic screening places ZIP 78666 in EPA Zone 3 — Low Potential (< 2.0 pCi/L), with 7 SDWIS drinking water facilities, 417 Clean Water NPDES permits, and 19 impaired water body dischargers tracked in this postal sector.