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13-SECTION MUNICIPAL PROPERTY, MARKET, FLOOD & HAZARD HUB • JOHNS ISLAND, SC

Johns Island, South Carolina — Property Hazard, Flood Zone, Soil, Water & Market Guide

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What Are the Major Property, Flood, Soil & Environmental Risks in Johns Island, SC?

Public U.S. EPA records track 169 regulated facilities in Johns Island, South Carolina (Charleston County), including 1 High-Risk sites (0.6%) and 3 active violators. In addition to industrial waste, Johns Island properties are screened for Tap Water & Watershed Permits (149 systems), USDA Soil Foundation Shrink-Swell (LOW signal), 6 County FEMA Disaster Declarations, and EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L).

Total EPA Sites
169
High-Risk (0.6% vs 1.4% State)
1
Active Violators (1.8%)
3
Drinking & Clean Water
149
Federal Penalties
$6,500

Johns Island, SC 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals

🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan
🌊 Flood Zone & FEMA Disaster History
Charleston County: 6 FEMA Declarations (5 Flood/Storm)
🔒 Exact Parcel Flood Zone (AE / VE / X) & SFHA Insurance Status Locked
Check Property Flood Zone →
🪨 USDA Soil, Foundation & Water Table
Shrink-Swell Risk Signal: LOW • Pipe Corrosion: High
🔒 Exact USDA Soil Series, Linear Extensibility (LEP %) & Water Table Depth (ft) Locked
Unlock Parcel Soil Test →
🚰 Tap Water (SDWIS) & PFAS Check
3 SDWIS Systems • 146 NPDES Permits
🔒 6 Impaired Water (303d) & 6 Violation Dockets Locked
Unlock Utility Violation Log →
☢️ EPA Radon & Karst Sinkhole
EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L)
Low / Non-Karst Bedrock & Alluvial Formation
🔒 0.25-Mi Vapor Intrusion Buffer Locked

📊 Johns Island, SC Statistical Risk Graphs & Multi-Hazard Telemetry

SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)
1. Municipal Regulatory & Water Program Mix
RCRA Hazardous Waste Generators 18 (10.7%)
Clean Water (NPDES) & Drinking Water (SDWIS) 149 (88.2%)
Active EPA Non-Compliance Dockets 3 (1.8%)
High-Risk Enforcement Facilities 1 (0.6%)
2. FEMA NRI & USGS Hazard Index (1–10) Relatively High (98.6/100)
🌊 Flood Exposure 9/10 • Very High Hazard
🔥 Wildfire Hazard 5/10 • Moderate Hazard
☀️ Extreme Heat 5/10 • Moderate Hazard
🌪️ Severe Wind / Storm 9/10 • Very High Hazard
🫨 USGS Earthquake 7/10 • High Hazard
3. City vs. County & State Benchmark
Johns Island High-Risk Rate 0.6%
Charleston County Average 0.9%
South Carolina (SC) Statewide Avg 1.4%
Unlock Street-Level Dossier: Paid report reveals exact facility names, distances in feet, USDA soil LEP %, water table depth, and parcel flood zone.
🔒 Scan a Property Address in Johns Island →

ZIP Codes in Johns Island, SC

ZIP 29457 (3 sites • 0 High Risk) ZIP 29454 (1 sites • 0 High Risk)

Highest-Scored EPA Regulated Facilities in Johns Island, SC

100% of High-Risk & penalized facilities have facility names, street names, and dockets redacted (3 Low-Risk compliant records shown as Free Previews).

Unlock Full Johns Island Dossier →
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 • JOHNS ISLAND, SC (ZIP 29455 Sector) MODERATE (30/100) Resolved / Historical Non-Compliance (4 qtrs NC) 🔒 Federal Penalty on File • Unlock →
🔒 Locked Regulated EPA Enforcement Record #2 🔒 Exact Street & Parcel Redacted • JOHNS ISLAND, SC (ZIP 29455 Sector) MODERATE (30/100) Violation Identified (3 qtrs NC) 🔒 3 Qtrs Non-Compliance • Unlock →
🔒 Locked Regulated EPA Enforcement Record #3 🔒 Exact Street & Parcel Redacted • JOHNS ISLAND, SC (ZIP 29455 Sector) MODERATE (30/100) Resolved / Historical Non-Compliance (1 qtrs NC) 🔒 1 Qtrs Non-Compliance • Unlock →
🔒 Locked Regulated EPA Enforcement Record #4 🔒 Exact Street & Parcel Redacted • JOHNS ISLAND, SC (ZIP 29455 Sector) MODERATE (30/100) Resolved / Historical Non-Compliance (2 qtrs NC) 🔒 2 Qtrs Non-Compliance • Unlock →
🔒 Locked Regulated EPA Enforcement Record #5 🔒 Exact Street & Parcel Redacted • JOHNS ISLAND, SC (ZIP 29455 Sector) MODERATE (30/100) Resolved / Historical Non-Compliance (2 qtrs NC) 🔒 2 Qtrs Non-Compliance • Unlock →
🔒 Locked Regulated EPA Enforcement Record #6 🔒 Exact Street & Parcel Redacted • JOHNS ISLAND, SC (ZIP 29455 Sector) MODERATE (30/100) Resolved / Historical Non-Compliance (2 qtrs NC) 🔒 2 Qtrs Non-Compliance • Unlock →
🔒 Locked Regulated EPA Enforcement Record #7 🔒 Exact Street & Parcel Redacted • JOHNS ISLAND, SC (ZIP 29455 Sector) MODERATE (30/100) Resolved / Historical Non-Compliance (1 qtrs NC) 🔒 1 Qtrs Non-Compliance • Unlock →
🔒 Locked Regulated EPA Enforcement Record #8 🔒 Exact Street & Parcel Redacted • JOHNS ISLAND, SC (ZIP 29455 Sector) MODERATE (30/100) No Violation Identified (0 qtrs NC) 🔒 Active Permit Dossier • Unlock →
ROSS MARINE DIVISION OF SWYGER FREE PREVIEW (LOW RISK) 2676 SWYGERT BLVD, JOHNS ISLAND, SC 29455 LOW (24/100) No Violation Identified (0 qtrs NC) $0
CESSCO INC. FREE PREVIEW (LOW RISK) 3609-A RIVER ROAD, JOHNS ISLAND, SC 29455 LOW (20/100) No Violation Identified (0 qtrs NC) $0
LEGARE PAINT & BODY SHOP FREE PREVIEW (LOW RISK) 209 MAIN RD, JOHNS ISLAND, SC 29455 LOW (17/100) No Violation Identified (0 qtrs NC) $0
US COAST GUARD AIR FACILITY FREE PREVIEW (LOW RISK) CHARLESTON EXECUTIVE AIRPORT, JOHNS ISLAND, SC 29455 LOW (17/100) No Violation Identified (0 qtrs NC) $0
🔒 + 157 Additional Regulated & Enforcement Records in Johns Island, SC Redacted from Public Directory Run 1-Mile Property Scan to Unlock All Records →

Frequently Asked Questions — Johns Island, South Carolina Environmental Risk & Radon

How many EPA-regulated facilities are in Johns Island, SC?

U.S. EPA records track 169 regulated facilities in Johns Island, South Carolina, including 1 high-risk sites (0.6%), 3 active violators (1.8%), and 18 RCRA hazardous waste handlers (10.7%).

Which ZIP codes in Johns Island, SC have the most EPA-tracked sites?

Within Johns Island, regulated facilities are primarily concentrated across ZIP 29457 (3 sites), ZIP 29454 (1 sites).

How can I check a specific house or commercial property in Johns Island, SC?

Enter the exact street address in Johns Island 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 Johns Island, SC and how many EPA water permits exist?

In Johns Island, SC, federal registries track 3 Safe Drinking Water (SDWIS) facilities, 146 Clean Water Act NPDES permits, and 6 impaired water body dischargers.

What is the soil foundation risk and FEMA flood disaster history in Johns Island, SC?

USDA regional soil screening for Johns Island indicates a LOW shrink-swell foundation signal, and Charleston County has recorded 6 federal FEMA disaster declarations (5 flood/severe storm declarations). Run an address scan to unlock exact parcel soil LEP %, water table depth, and flood zone.

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