ZIP 78521 (Brownsville, TX) — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
ZIP code 78521 in Brownsville, Texas (Cameron County) has 461 EPA-tracked facilities, including 12 High-Risk sites (2.6%), 10 active violators, and $515,352 in federal penalties. Beyond industrial pollution, properties in ZIP 78521 are screened across 4 historical Cameron County FEMA disasters, USDA Soil Foundation Shrink-Swell (HIGH signal), Tap Water & Watershed Permits (221), and EPA Zone 3 — Low Potential (< 2.0 pCi/L).
ZIP 78521 (Brownsville, 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 78521 (Brownsville, TX) Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)ZIP 78521 Sector Screening Map (High-Risk Pin Coordinates Locked)
Exact street pins for 12 High-Risk and 10 Active Violation sites are redacted on public directory maps.
Regulated EPA Facilities in ZIP 78521 (Brownsville, 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 • BROWNSVILLE, TX (ZIP 78521 Sector) | HIGH (64/100) | No Violation Identified (0 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • BROWNSVILLE, TX (ZIP 78521 Sector) | HIGH (64/100) | No Violation Identified (0 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • BROWNSVILLE, TX (ZIP 78521 Sector) | HIGH (64/100) | No Violation Identified (0 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • BROWNSVILLE, TX (ZIP 78521 Sector) | HIGH (64/100) | Resolved / Historical Non-Compliance (7 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • BROWNSVILLE, TX (ZIP 78521 Sector) | HIGH (64/100) | No Violation Identified (0 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • BROWNSVILLE, TX (ZIP 78521 Sector) | HIGH (64/100) | Significant Violation (4 qtrs NC) | 🔒 4 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • BROWNSVILLE, TX (ZIP 78521 Sector) | HIGH (64/100) | Significant Violation (3 qtrs NC) | 🔒 3 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • BROWNSVILLE, TX (ZIP 78521 Sector) | MODERATE (60/100) | Violation (12 qtrs NC) | 🔒 Federal Penalty on File • Unlock → |
| LIQUID TRANSPORTERS FREE PREVIEW (LOW RISK) | 2020 N CENTRAL AVE, BROWNSVILLE, TX 78521 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
| AUSTIN STAR DETONATOR FREE PREVIEW (LOW RISK) | 901 CANTU ROAD, BROWNSVILLE, TX 78521 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
| U S FORWARDING LLC FREE PREVIEW (LOW RISK) | 1355 N CENTRAL AVE, BROWNSVILLE, TX 78521 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| TYCO FREE PREVIEW (LOW RISK) | 5845 S PADRE ISLAND HWY STE I, BROWNSVILLE, TX 78521 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — ZIP 78521 (Brownsville, 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 78521 (Brownsville, TX)?
ZIP code 78521 (Brownsville, TX) contains 461 EPA-tracked facilities, of which 12 (2.6%) are classified in the High-Risk tier, 10 (2.2%) have active compliance violations, and 227 (49.2%) handle RCRA hazardous waste.
How does ZIP 78521 compare to Cameron County and Texas averages?
In ZIP 78521, 2.6% of regulated sites are rated High Risk, compared to 2.7% across Cameron County and 1.6% statewide in Texas.
What is the EPA Radon Zone and ASTM Phase I screening radius for ZIP 78521?
Geologic screening places ZIP 78521 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 78521 (Brownsville, TX) in a FEMA flood zone and what is the flood disaster history?
Cameron County has recorded 4 historical FEMA federal disaster declarations (2 flood, hurricane, or severe storm declarations). Run a street address scan in ZIP 78521 to unlock the exact parcel FEMA flood zone (AE / VE / X) and mandatory flood insurance status.
Does ZIP 78521 have expansive clay soil, foundation problems, or drinking water violations?
USDA regional soil screening for ZIP 78521 indicates a HIGH shrink-swell risk signal. Within ZIP 78521, federal registries track 2 SDWIS drinking water facilities, 219 Clean Water NPDES permits, and 7 impaired water body dischargers. Unlock a full property report for exact soil LEP %, water table depth, and utility violation dockets.