Keystone, South Dakota — Flood Zone, Tap Water Quality, Soil Foundation, Radon & EPA Hazards
Public U.S. EPA records track 22 regulated facilities in Keystone, South Dakota (Pennington County), including 0 High-Risk sites (0.0%) and 0 active violators. In addition to industrial waste, Keystone properties are screened for Tap Water & Watershed Permits (21 systems), USDA Soil Foundation Shrink-Swell (HIGH signal), 3 County FEMA Disaster Declarations, and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Keystone, SD 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Keystone, SD Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)ZIP Codes in Keystone, SD
Highest-Scored EPA Regulated Facilities in Keystone, SD
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 Regulated EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • KEYSTONE, SD (ZIP 57751 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • KEYSTONE, SD (ZIP 57751 Sector) | MODERATE (24/100) | Resolved / Historical Non-Compliance (5 qtrs NC) | 🔒 5 Qtrs Non-Compliance • Unlock → |
| XANTERRA PARKS AND RESORTS, INC. FREE PREVIEW (LOW RISK) | 311 FIRST ST, KEYSTONE, SD 57751 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| PCN 05V8 FREE PREVIEW (LOW RISK) | KEYSTONE, KEYSTONE, SD 57751 | LOW (12/100) | No Violation Identified (0 qtrs NC) | $0 |
| COMFORT INN & SUITES - MOUNT RUSHMORE FREE PREVIEW (LOW RISK) | 321 SWANZEY STREET, KEYSTONE, SD 57751 | LOW (12/100) | No Violation Identified (0 qtrs NC) | $0 |
| MOUNT RUSHMORE NATIONAL MONUMENT FREE PREVIEW (LOW RISK) | 13000 SD HIGHWAY 244, KEYSTONE, SD 57751 | LOW (12/100) | No Violation Identified (0 qtrs NC) | $0 |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • KEYSTONE, SD (ZIP 57751 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • KEYSTONE, SD (ZIP 57751 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • KEYSTONE, SD (ZIP 57751 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • KEYSTONE, SD (ZIP 57751 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • KEYSTONE, SD (ZIP 57751 Sector) | LOW (12/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • KEYSTONE, SD (ZIP 57751 Sector) | LOW (10/100) | Inactive (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
Frequently Asked Questions — Keystone, South Dakota Environmental Risk & Radon
How many EPA-regulated facilities are in Keystone, SD?
U.S. EPA records track 22 regulated facilities in Keystone, South Dakota, including 0 high-risk sites (0.0%), 0 active violators (0.0%), and 2 RCRA hazardous waste handlers (9.1%).
Which ZIP codes in Keystone, SD have the most EPA-tracked sites?
Within Keystone, regulated facilities are primarily concentrated across ZIP 57751 (23 sites).
How can I check a specific house or commercial property in Keystone, SD?
Enter the exact street address in Keystone into the FullPropertyReport radius scanner to screen all EPA ECHO, FRS, RCRA, TRI, USDA soil foundation shrink-swell, drinking water (SDWIS), FEMA flood zone, and county radon records within 0.5 to 3.0 miles.
Is tap water safe in Keystone, SD and how many EPA water permits exist?
In Keystone, SD, federal registries track 10 Safe Drinking Water (SDWIS) facilities, 11 Clean Water Act NPDES permits, and 0 impaired water body dischargers.
What is the soil foundation risk and FEMA flood disaster history in Keystone, SD?
USDA regional soil screening for Keystone indicates a HIGH shrink-swell foundation signal, and Pennington County has recorded 3 federal FEMA disaster declarations (0 flood/severe storm declarations). Run an address scan to unlock exact parcel soil LEP %, water table depth, and flood zone.