Union County, Ohio — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Union County, OH?
In Union County, Ohio, public U.S. EPA records track 208 regulated facilities (#63 of 141 in Ohio), including 3 (1.4%) High-Risk sites and $305,746 in federal penalties. Countywide due diligence also covers 50 Safe Drinking Water (SDWIS) facilities, 22 Clean Water NPDES permits, 1 FEMA Federal Disaster Declarations (1 flood/storm), USDA Soil Foundation Shrink-Swell (MODERATE signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Union County, OH 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Union County, OH Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in Union County
ZIP Codes in Union County
Top EPA Regulated Facilities in Union County, OH
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 • MARYSVILLE, OH (ZIP 43040 Sector) | HIGH (71/100) | Violation Identified (9 qtrs NC) | 🔒 Federal Penalty on File • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • MARYSVILLE, OH (ZIP 43040 Sector) | MODERATE (60/100) | Resolved / Historical Non-Compliance (3 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • RICHWOOD, OH (ZIP 43344 Sector) | MODERATE (44/100) | Violation Identified (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • MARYSVILLE, OH (ZIP 43040 Sector) | MODERATE (44/100) | Violation Identified (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • MARYSVILLE, OH (ZIP 43040 Sector) | MODERATE (43/100) | Violation Identified (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • MARYSVILLE, OH (ZIP 43040 Sector) | MODERATE (42/100) | Violation Identified (9 qtrs NC) | 🔒 9 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • MARYSVILLE, OH (ZIP 43040 Sector) | MODERATE (41/100) | Violation Identified (9 qtrs NC) | 🔒 9 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • MILFORD CENTER, OH (ZIP 43045 Sector) | MODERATE (39/100) | Violation Identified (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| HONDA DEVELOPMENT & MANUFACTURING OF AMERICA, LLC - ADC FREE PREVIEW (LOW RISK) | 21001 ST. RT. 739, RAYMOND, OH 43067 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| OHIO DEPARTMENT OF TRANSPORTATION FREE PREVIEW (LOW RISK) | JCT SR 33 & CO RD 141 LEFT, MARYSVILLE, OH 43040 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| LAIDLAW TRANSIT INC FREE PREVIEW (LOW RISK) | 1280 CHARLES LANE, MARYSVILLE, OH 43040 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| GI PLASTEK MARYSVILLE PLT FREE PREVIEW (LOW RISK) | 648 CLYMER RD, MARYSVILLE, OH 43040 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Union County, Ohio Environmental Due Diligence
How many EPA-regulated environmental sites are in Union County, Ohio?
Public U.S. EPA records track 208 regulated facilities in Union County, Ohio (ranking #63 of 141 jurisdictions in OH). Of those, 3 (1.4%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 14 (6.7%) have active non-compliance quarters.
Which ZIP codes and cities in Union County have the highest regulated facility density?
Within Union County, the highest concentrations of EPA-tracked facilities are located in ZIP 43040 (Marysville, 114 sites), ZIP 43064 (Plain City, 66 sites), ZIP 43344 (Richwood, 19 sites), spanning municipal corridors including Marysville (111 sites), Plain City (64 sites), Richwood (19 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Union County?
Across Union County, 126 facilities (60.6% 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 Union County, OH?
Geologic indoor air screening places Union 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 Union County, OH?
Federal records track 50 Safe Drinking Water (SDWIS) facilities, 22 Clean Water Act NPDES permits, and 21 impaired water dischargers in Union County, alongside 1 historical FEMA federal disaster declarations (1 flood/storm events).
Does Union County, OH have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Union County indicates a MODERATE 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.