Williamson County, Texas — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Williamson County, TX?
In Williamson County, Texas, public U.S. EPA records track 2,482 regulated facilities (#15 of 469 in Texas), including 10 (0.4%) High-Risk sites and $103,609 in federal penalties. Countywide due diligence also covers 0 Safe Drinking Water (SDWIS) facilities, 2,465 Clean Water NPDES permits, 4 FEMA Federal Disaster Declarations (1 flood/storm), USDA Soil Foundation Shrink-Swell (HIGH signal), and EPA Zone 3 — Low Potential (< 2.0 pCi/L).
Williamson County, TX 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Williamson County, TX Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)Municipalities in Williamson County
ZIP Codes in Williamson County
Top EPA Regulated Facilities in Williamson County, 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 Tier & Score | Compliance Status | Enforcement / Unlock |
|---|---|---|---|---|
| 🔒 Locked Regulated EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • LIBERTY HILL, TX (ZIP 78642 Sector) | MODERATE (49/100) | Violation Identified (8 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • FLORENCE, TX (ZIP 76527 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • GEORGETOWN, TX (ZIP 78633 Sector) | MODERATE (33/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • LIBERTY HILL, TX (ZIP 78642 Sector) | MODERATE (33/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • FLORENCE, TX (ZIP 76527 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • GEORGETOWN, TX (ZIP 78628 Sector) | MODERATE (30/100) | No Violation Identified (0 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • JARRELL, TX (ZIP 78537 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • GEORGETOWN, TX (ZIP 78628 Sector) | MODERATE (30/100) | No Violation Identified (0 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| STI INTERNATIONAL FREE PREVIEW (LOW RISK) | 114 HALMAR CV, GEORGETOWN, TX 78628 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
| BLUE SKY WRF FREE PREVIEW (LOW RISK) | 751 COUNTY ROAD 401, TAYLOR, TX 76574 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
| UNITED PARCEL SERVICE FREE PREVIEW (LOW RISK) | 33 ROUNDVILLE LN, ROUND ROCK, TX 78664 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
| KALAHARI RESORT FREE PREVIEW (LOW RISK) | 250 KALAHARI BLVD, ROUND ROCK, TX 78665 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Williamson County, Texas Environmental Due Diligence
How many EPA-regulated environmental sites are in Williamson County County, Texas?
Public U.S. EPA records track 2,482 regulated facilities in Williamson County County, Texas (ranking #15 of 469 jurisdictions in TX). Of those, 10 (0.4%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 5 (0.2%) have active non-compliance quarters.
Which ZIP codes and cities in Williamson County County have the highest regulated facility density?
Within Williamson County County, the highest concentrations of EPA-tracked facilities are located in ZIP 78628 (Georgetown, 642 sites), ZIP 78626 (Georgetown, 476 sites), ZIP 78613 (Cedar Park, 259 sites), spanning municipal corridors including Cedar Park (287 sites), Jarrell (164 sites), Florence (64 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Williamson County County?
Across Williamson County County, 4 facilities (0.2% 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 Williamson County County, TX?
Geologic indoor air screening places Williamson County 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 Williamson County County, TX?
Federal records track 0 Safe Drinking Water (SDWIS) facilities, 2,465 Clean Water Act NPDES permits, and 122 impaired water dischargers in Williamson County County, alongside 4 historical FEMA federal disaster declarations (1 flood/storm events).
Does Williamson County, TX have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Williamson County indicates a HIGH 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.