ZIP 78680 (Round Rock, TX) — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
ZIP code 78680 in Round Rock, Texas (Williamson County) has 4 EPA-tracked facilities, including 0 High-Risk sites (0.0%), 1 active violators, and $0 in federal penalties. Beyond industrial pollution, properties in ZIP 78680 are screened across 4 historical Williamson County FEMA disasters, USDA Soil Foundation Shrink-Swell (HIGH signal), Tap Water & Watershed Permits (3), and EPA Zone 3 — Low Potential (< 2.0 pCi/L).
ZIP 78680 (Round Rock, 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 78680 (Round Rock, TX) Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)ZIP 78680 Sector Screening Map (High-Risk Pin Coordinates Locked)
Exact street pins for 0 High-Risk and 1 Active Violation sites are redacted on public directory maps.
Regulated EPA Facilities in ZIP 78680 (Round Rock, 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 Regulated EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • ROUND ROCK, TX (ZIP 78680 Sector) | MODERATE (35/100) | Violation Identified (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| IRONHORSE CONCRETE, INC. FREE PREVIEW (LOW RISK) | 300 IRONHORSE DRIVE, ROUND ROCK, TX 78680 | LOW (11/100) | No Violation Identified (0 qtrs NC) | $0 |
| SAULS RANCH HAIRY MAN TRACT FREE PREVIEW (LOW RISK) | SITE IS LOCATED JUST WEST OF THE INTERSECTION OF H, ROUND ROCK, TX 78680 | LOW (11/100) | No Violation Identified (0 qtrs NC) | $0 |
| CLASSIC MARBLE CO FREE PREVIEW (LOW RISK) | 16501 BRATTON LN, ROUND ROCK, TX 78680 | LOW (10/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — ZIP 78680 (Round Rock, TX) EPA Dataset & Radon
DATASET: U.S. EPA ECHO • FRS • RCRAInfo • TRI (November 01, 2026)How many EPA-tracked environmental sites are in ZIP code 78680 (Round Rock, TX)?
ZIP code 78680 (Round Rock, TX) contains 4 EPA-tracked facilities, of which 0 (0.0%) are classified in the High-Risk tier, 1 (25.0%) have active compliance violations, and 0 (0.0%) handle RCRA hazardous waste.
How does ZIP 78680 compare to Williamson County and Texas averages?
In ZIP 78680, 0.0% of regulated sites are rated High Risk, compared to 1.4% across Williamson County and 1.6% statewide in Texas.
What is the EPA Radon Zone and ASTM Phase I screening radius for ZIP 78680?
Geologic screening places ZIP 78680 in EPA Zone 3 — Low Potential (< 2.0 pCi/L). Property buyers should screen a 0.25-mile immediate buffer for vapor-intrusion sources and a 1.0-mile radius for CERCLA/RCRA sites.
Is ZIP 78680 (Round Rock, TX) in a FEMA flood zone and what is the flood disaster history?
Williamson County has recorded 4 historical FEMA federal disaster declarations (1 flood, hurricane, or severe storm declarations). Run a street address scan in ZIP 78680 to unlock the exact parcel FEMA flood zone (AE / VE / X) and mandatory flood insurance status.
Does ZIP 78680 have expansive clay soil, foundation problems, or drinking water violations?
USDA regional soil screening for ZIP 78680 indicates a HIGH shrink-swell risk signal. Within ZIP 78680, federal registries track 1 SDWIS drinking water facilities, 2 Clean Water NPDES permits, and 0 impaired water body dischargers. Unlock a full property report for exact soil LEP %, water table depth, and utility violation dockets.