Williamson County, Texas — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
In Williamson County, Texas, public U.S. EPA records track 2,037 regulated facilities (#19 of 469 in Texas), including 28 (1.4%) High-Risk sites and $2,798,573 in federal penalties. Countywide due diligence also covers 62 Safe Drinking Water (SDWIS) facilities, 4,122 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 01, 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 High-Risk EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • ROUND ROCK, TX (ZIP 78665 Sector) | HIGH (69/100) | Violation Identified (12 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • GEORGETOWN, TX (ZIP 78627 Sector) | HIGH (68/100) | Violation Identified (6 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • WILLIAMSON COUNTY, TX (ZIP 78703 Sector) | HIGH (66/100) | Violation Identified (10 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • CEDAR PARK, TX (ZIP 78613 Sector) | HIGH (64/100) | No Violation Identified (0 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • LEANDER, TX (ZIP 78641 Sector) | HIGH (64/100) | No Violation Identified (0 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • GEORGETOWN, TX (ZIP 78633 Sector) | HIGH (64/100) | No Violation Identified (0 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • LEANDER, TX (ZIP 78641 Sector) | HIGH (64/100) | Violation Identified (7 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • GEORGETOWN, TX (ZIP 78633 Sector) | HIGH (64/100) | No Violation Identified (0 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| ACC ROUND ROCK CAMPUS - PHASE 1 - BLDG 4000 & BLDG 5500 FREE PREVIEW (LOW RISK) | 4400 COLLEGE PARK DR, ROUND ROCK, TX 78665 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| TERRYS BODY SHOP FREE PREVIEW (LOW RISK) | 1508 W 2ND ST, TAYLOR, TX 76574 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| CVS PHARMACY 10486 FREE PREVIEW (LOW RISK) | 301 301 CHRIS KELLEY BLVD, HUTTO, TX 78634 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| COOKS SERVICE ON SITE FREE PREVIEW (LOW RISK) | 3458 YOGI VERRA WAY, ROUND ROCK, TX 78665 | LOW (15/100) | 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, Texas?
Public U.S. EPA records track 2,037 regulated facilities in Williamson County, Texas (ranking #19 of 469 jurisdictions in TX). Of those, 28 (1.4%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 29 (1.4%) have active non-compliance quarters.
Which ZIP codes and cities in Williamson County have the highest regulated facility density?
Within Williamson County, the highest concentrations of EPA-tracked facilities are located in ZIP 78634 (Hutto, 456 sites), ZIP 78642 (Liberty Hill, 390 sites), ZIP 78633 (Georgetown, 329 sites), spanning municipal corridors including Georgetown (1,267 sites), Round Rock (674 sites), Liberty Hill (439 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Williamson County?
Across Williamson County, 307 facilities (15.1% 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, TX?
Geologic indoor air screening places Williamson 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, TX?
Federal records track 62 Safe Drinking Water (SDWIS) facilities, 4,122 Clean Water Act NPDES permits, and 221 impaired water dischargers in Williamson 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.