Stephens County, Oklahoma — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Stephens County, OK?
In Stephens County, Oklahoma, public U.S. EPA records track 372 regulated facilities (#19 of 154 in Oklahoma), including 4 (1.1%) High-Risk sites and $56,225 in federal penalties. Countywide due diligence also covers 25 Safe Drinking Water (SDWIS) facilities, 14 Clean Water NPDES permits, 6 FEMA Federal Disaster Declarations (2 flood/storm), USDA Soil Foundation Shrink-Swell (LOW signal), and EPA Zone 3 — Low Potential (< 2.0 pCi/L).
Stephens County, OK 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Stephens County, OK Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in Stephens County
Top EPA Regulated Facilities in Stephens County, OK
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 • DUNCAN, OK (ZIP 73533 Sector) | HIGH (64/100) | Significant Violation (4 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • MARLOW, OK (ZIP 73055 Sector) | MODERATE (51/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • DUNCAN, OK (ZIP 73536 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • COUNTY LINE, OK (ZIP 73052 Sector) | MODERATE (33/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • VELMA, OK (ZIP 73491 Sector) | MODERATE (31/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • DUNCAN, OK (ZIP 73533 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (5 qtrs NC) | 🔒 5 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • MARLOW, OK (ZIP 73055 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (2 qtrs NC) | 🔒 2 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • DUNCAN, OK (ZIP 73533 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| HOWARD ENERGY PARTNERS / SHOLEM BOOSTER STATION FREE PREVIEW (LOW RISK) | 173824 N. 3040 RD., DUNCAN, OK 73533 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| VALCO MFG / VALCO DUNCAN FACLTY FREE PREVIEW (LOW RISK) | 1003 S 2ND STREET, DUNCAN, OK 73533 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| HAULMARK INDUSTRIES INC FREE PREVIEW (LOW RISK) | 1515 MCCURDY RD, DUNCAN, OK 73533 | LOW (18/100) | No Violation Identified (0 qtrs NC) | $0 |
| GOODNERS PHOTO FINISH FREE PREVIEW (LOW RISK) | 1601 N HWY 81 ELK PLAZA, DUNCAN, OK 73533 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Stephens County, Oklahoma Environmental Due Diligence
How many EPA-regulated environmental sites are in Stephens County, Oklahoma?
Public U.S. EPA records track 372 regulated facilities in Stephens County, Oklahoma (ranking #19 of 154 jurisdictions in OK). Of those, 4 (1.1%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 5 (1.3%) have active non-compliance quarters.
Which ZIP codes and cities in Stephens County have the highest regulated facility density?
Within Stephens County, the highest concentrations of EPA-tracked facilities are located in ZIP 73533 (Duncan, 193 sites), ZIP 73491 (Velma, 77 sites), ZIP 73025 (Countyline, 41 sites), spanning municipal corridors including Velma (144 sites), Duncan (133 sites), Marlow (102 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Stephens County?
Across Stephens County, 128 facilities (34.4% 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 Stephens County, OK?
Geologic indoor air screening places Stephens 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 Stephens County, OK?
Federal records track 25 Safe Drinking Water (SDWIS) facilities, 14 Clean Water Act NPDES permits, and 4 impaired water dischargers in Stephens County, alongside 6 historical FEMA federal disaster declarations (2 flood/storm events).
Does Stephens County, OK have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Stephens County indicates a LOW 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.