ZIP 37921 (Knoxville, TN) — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
ZIP code 37921 in Knoxville, Tennessee (Knox County) has 202 EPA-tracked facilities, including 7 High-Risk sites (3.5%), 10 active violators, and $159,392 in federal penalties. Beyond industrial pollution, properties in ZIP 37921 are screened across 4 historical Knox County FEMA disasters, USDA Soil Foundation Shrink-Swell (LOW signal), Tap Water & Watershed Permits (68), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
ZIP 37921 (Knoxville, TN) 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 ZIP 37921 (Knoxville, TN) Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)ZIP 37921 Sector Screening Map (High-Risk Pin Coordinates Locked)
Exact street pins for 7 High-Risk and 10 Active Violation sites are redacted on public directory maps.
Regulated EPA Facilities in ZIP 37921 (Knoxville, TN)
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 • KNOXVILLE, TN (ZIP 37921 Sector) | HIGH (69/100) | Significant Violation (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • KNOXVILLE, TN (ZIP 37921 Sector) | HIGH (64/100) | Significant Violation (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • KNOXVILLE, TN (ZIP 37921 Sector) | HIGH (64/100) | Significant Violation (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • KNOXVILLE, TN (ZIP 37921 Sector) | HIGH (64/100) | Significant Violation (3 qtrs NC) | 🔒 3 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • KNOXVILLE, TN (ZIP 37921 Sector) | HIGH (64/100) | Significant Violation (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • KNOXVILLE, TN (ZIP 37921 Sector) | MODERATE (48/100) | Violation Identified (6 qtrs NC) | 🔒 Federal Penalty on File • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • KNOXVILLE, TN (ZIP 37921 Sector) | MODERATE (46/100) | Violation Identified (2 qtrs NC) | 🔒 2 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • KNOXVILLE, TN (ZIP 37921 Sector) | MODERATE (46/100) | Violation Identified (2 qtrs NC) | 🔒 2 Qtrs Non-Compliance • Unlock → |
| POST TRAILER REPAIRS, INC. FREE PREVIEW (LOW RISK) | 1901 SUTHERLAND AVE, KNOXVILLE, TN 37921 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
| ESTES EXPRESS FREE PREVIEW (LOW RISK) | 3244 NW PARK DR., KNOXVILLE, TN 37921 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
| DIAGNOSTIC IMAGING INC. FREE PREVIEW (LOW RISK) | 3010 INDUSTRIAL PARKWAY, KNOXVILLE, TN 37921 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| BRENCO INCORPORATED FREE PREVIEW (LOW RISK) | 6030 INDUSTRIAL HEIGHTS DRIVE, KNOXVILLE, TN 37921 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — ZIP 37921 (Knoxville, TN) EPA Dataset & Radon
DATASET: U.S. EPA ECHO • FRS • RCRAInfo • TRI (November 01, 2026)How many EPA-tracked environmental sites are in ZIP code 37921 (Knoxville, TN)?
ZIP code 37921 (Knoxville, TN) contains 202 EPA-tracked facilities, of which 7 (3.5%) are classified in the High-Risk tier, 10 (5.0%) have active compliance violations, and 130 (64.4%) handle RCRA hazardous waste.
How does ZIP 37921 compare to Knox County and Tennessee averages?
In ZIP 37921, 3.5% of regulated sites are rated High Risk, compared to 1.1% across Knox County and 1.7% statewide in Tennessee.
What is the EPA Radon Zone and ASTM Phase I screening radius for ZIP 37921?
Geologic screening places ZIP 37921 in EPA Zone 1 — High Potential (> 4.0 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 37921 (Knoxville, TN) in a FEMA flood zone and what is the flood disaster history?
Knox County has recorded 4 historical FEMA federal disaster declarations (2 flood, hurricane, or severe storm declarations). Run a street address scan in ZIP 37921 to unlock the exact parcel FEMA flood zone (AE / VE / X) and mandatory flood insurance status.
Does ZIP 37921 have expansive clay soil, foundation problems, or drinking water violations?
USDA regional soil screening for ZIP 37921 indicates a LOW shrink-swell risk signal. Within ZIP 37921, federal registries track 0 SDWIS drinking water facilities, 68 Clean Water NPDES permits, and 31 impaired water body dischargers. Unlock a full property report for exact soil LEP %, water table depth, and utility violation dockets.