Lyman County, South Dakota — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Lyman County, SD?
In Lyman County, South Dakota, public U.S. EPA records track 36 regulated facilities (#42 of 109 in South Dakota), including 2 (5.6%) High-Risk sites and $0 in federal penalties. Countywide due diligence also covers 5 Safe Drinking Water (SDWIS) facilities, 36 Clean Water NPDES permits, 15 FEMA Federal Disaster Declarations (8 flood/storm), USDA Soil Foundation Shrink-Swell (HIGH signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Lyman County, SD 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Lyman County, SD Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in Lyman County
ZIP Codes in Lyman County
Top EPA Regulated Facilities in Lyman County, 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 • LOWER BRULE, SD (ZIP 57548 Sector) | MODERATE (30/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • RELIANCE, SD (ZIP 57569 Sector) | MODERATE (30/100) | Resolved / Historical Non-Compliance (3 qtrs NC) | 🔒 3 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • LOWER BRULE, SD (ZIP 57548 Sector) | MODERATE (29/100) | Significant Violation (9 qtrs NC) | 🔒 9 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • , SD (ZIP Sector) | MODERATE (23/100) | Violation Identified (5 qtrs NC) | 🔒 5 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • KENNEBEC, SD (ZIP 57544 Sector) | MODERATE (20/100) | Resolved / Historical Non-Compliance (2 qtrs NC) | 🔒 2 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • OACOMA, SD (ZIP 57365 Sector) | MODERATE (20/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| SD DOT - CONSTRUCTION SITE NEAR VIVIAN (FORMER) FREE PREVIEW (LOW RISK) | T105N R79W NE1/4 SEC 9, VIVIAN, SD 57576 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| NW PUBLIC SRVC - CHAMBERLAIN PWR PLNT FREE PREVIEW (LOW RISK) | EAST PROSPECT STREET, CHAMBERLAIN, SD 57325 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| SOLID WASTE FACILITY FREE PREVIEW (LOW RISK) | 1 1/2 MILES ON BIA ROUTE 17 (233 STREET), LOWER BRULE, SD 57548 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| LOWER BRULE MOTOR POOL FREE PREVIEW (LOW RISK) | 222 CRAZY HORSE ST, LOWER BRULE, SD 57548 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • UNK, SD (ZIP 99999 Sector) | LOW (16/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • LOWER BRULE, SD (ZIP 57548 Sector) | LOW (15/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
Frequently Asked Questions — Lyman County, South Dakota Environmental Due Diligence
How many EPA-regulated environmental sites are in Lyman County, South Dakota?
Public U.S. EPA records track 36 regulated facilities in Lyman County, South Dakota (ranking #42 of 109 jurisdictions in SD). Of those, 2 (5.6%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 3 (8.3%) have active non-compliance quarters.
Which ZIP codes and cities in Lyman County have the highest regulated facility density?
Within Lyman County, the highest concentrations of EPA-tracked facilities are located in ZIP 57548 (Lower Brule, 23 sites), ZIP 57365 (Oacoma, 5 sites), ZIP 57576 (Vivian, 3 sites), spanning municipal corridors including Lower Brule (24 sites), Oacoma (5 sites), Vivian (2 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Lyman County?
Across Lyman County, 7 facilities (19.4% 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 Lyman County, SD?
Geologic indoor air screening places Lyman 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 Lyman County, SD?
Federal records track 5 Safe Drinking Water (SDWIS) facilities, 36 Clean Water Act NPDES permits, and 4 impaired water dischargers in Lyman County, alongside 15 historical FEMA federal disaster declarations (8 flood/storm events).
Does Lyman County, SD have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Lyman County indicates a HIGH shrink-swell risk signal and steel pipe corrosivity rated High. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.