Arapahoe County, Colorado — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Arapahoe County, CO?
In Arapahoe County, Colorado, public U.S. EPA records track 4,233 regulated facilities (#5 of 108 in Colorado), including 35 (0.8%) High-Risk sites and $7,518,219 in federal penalties. Countywide due diligence also covers 56 Safe Drinking Water (SDWIS) facilities, 2,228 Clean Water NPDES permits, 1 FEMA Federal Disaster Declarations (1 flood/storm), USDA Soil Foundation Shrink-Swell (HIGH signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Arapahoe County, CO 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Arapahoe County, CO Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)Municipalities in Arapahoe County
ZIP Codes in Arapahoe County
Top EPA Regulated Facilities in Arapahoe County, CO
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 • SHERIDAN, CO (ZIP 80110 Sector) | HIGH (71/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • AURORA, CO (ZIP 80016 Sector) | HIGH (68/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • LITTLETON, CO (ZIP 80120 Sector) | HIGH (66/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • LITTLETON, CO (ZIP 80120 Sector) | HIGH (64/100) | Violation Identified (11 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • AURORA, CO (ZIP 80111 Sector) | HIGH (64/100) | Violation Identified (1 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • AURORA, CO (ZIP 80015 Sector) | HIGH (64/100) | Violation Identified (1 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • CENTENNIAL, CO (ZIP 80112 Sector) | HIGH (64/100) | Significant Violation (6 qtrs NC) | 🔒 6 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • AURORA, CO (ZIP 80016 Sector) | HIGH (64/100) | Significant Violation (4 qtrs NC) | 🔒 4 Qtrs Non-Compliance • Unlock → |
| J.W. REFFEL METALS FOUNDRY INC FREE PREVIEW (LOW RISK) | 2650 S TEJON ST, ENGLEWOOD, CO 80110 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| AUTO BODY & PAINT CTR FREE PREVIEW (LOW RISK) | 4050 S BROADWAY, ENGLEWOOD, CO 80113 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
| AAI ACQUISITION INC FREE PREVIEW (LOW RISK) | 12876 E ADAM AIRCRAFT CIR, ENGLEWOOD, CO 80112 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| INFINITI OF DENVER FREE PREVIEW (LOW RISK) | 2990 S HAVANA, AURORA, CO 80014 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Arapahoe County, Colorado Environmental Due Diligence
How many EPA-regulated environmental sites are in Arapahoe County, Colorado?
Public U.S. EPA records track 4,233 regulated facilities in Arapahoe County, Colorado (ranking #5 of 108 jurisdictions in CO). Of those, 35 (0.8%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 89 (2.1%) have active non-compliance quarters.
Which ZIP codes and cities in Arapahoe County have the highest regulated facility density?
Within Arapahoe County, the highest concentrations of EPA-tracked facilities are located in ZIP 80011 (Aurora, 778 sites), ZIP 80112 (Englewood, 723 sites), ZIP 80110 (Englewood, 609 sites), spanning municipal corridors including Aurora (2,845 sites), Englewood (1,075 sites), Centennial (465 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Arapahoe County?
Across Arapahoe County, 1,461 facilities (34.5% 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 Arapahoe County, CO?
Geologic indoor air screening places Arapahoe County in EPA Zone 1 — High Potential (> 4.0 pCi/L). Counties in EPA Radon Zone 1 have a predicted average indoor radon screening level greater than 4.0 pCi/L (the EPA action threshold). Short-term or continuous indoor radon testing is strongly recommended prior to closing.
How many drinking water systems (SDWIS), impaired water bodies, and FEMA flood disasters are recorded in Arapahoe County, CO?
Federal records track 56 Safe Drinking Water (SDWIS) facilities, 2,228 Clean Water Act NPDES permits, and 107 impaired water dischargers in Arapahoe County, alongside 1 historical FEMA federal disaster declarations (1 flood/storm events).
Does Arapahoe County, CO have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Arapahoe County indicates a HIGH shrink-swell risk signal and steel pipe corrosivity rated Moderate. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.