Washtenaw County, Michigan — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
In Washtenaw County, Michigan, public U.S. EPA records track 1,683 regulated facilities (#7 of 138 in Michigan), including 15 (0.9%) High-Risk sites and $5,433,744 in federal penalties. Countywide due diligence also covers 42 Safe Drinking Water (SDWIS) facilities, 202 Clean Water NPDES permits, 2 FEMA Federal Disaster Declarations (2 flood/storm), USDA Soil Foundation Shrink-Swell (MODERATE signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Washtenaw County, MI 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Washtenaw County, MI Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)Municipalities in Washtenaw County
ZIP Codes in Washtenaw County
Top EPA Regulated Facilities in Washtenaw County, MI
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 • CHELSEA, MI (ZIP 48118 Sector) | HIGH (70/100) | Significant Violation (9 qtrs NC) | 🔒 9 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • ANN ARBOR, MI (ZIP 48104 Sector) | HIGH (68/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • YPSILANTI, MI (ZIP 48198 Sector) | HIGH (67/100) | Violation Identified (11 qtrs NC) | 🔒 Federal Penalty on File • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • YPSILANTI, MI (ZIP 48197 Sector) | HIGH (64/100) | No Violation Identified (0 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • YPSILANTI, MI (ZIP 48197 Sector) | HIGH (64/100) | No Violation Identified (0 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • SALINE, MI (ZIP 48176 Sector) | HIGH (64/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • CHELSEA, MI (ZIP 48118 Sector) | HIGH (64/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • SALINE, MI (ZIP 48176 Sector) | HIGH (64/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| COLLINS & AIKMAN PLASTICS FREE PREVIEW (LOW RISK) | 500 W MADISON ST, MANCHESTER, MI 48158 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| MCKINLEY ASSOCIATES FREE PREVIEW (LOW RISK) | 4663 WASHTENAW AVE, ANN ARBOR, MI 48108 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| STRATA ONCOLOGY FREE PREVIEW (LOW RISK) | 8170 JACKSON RD, ANN ARBOR, MI 48103 | LOW (15/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Washtenaw County, Michigan Environmental Due Diligence
How many EPA-regulated environmental sites are in Washtenaw County, Michigan?
Public U.S. EPA records track 1,683 regulated facilities in Washtenaw County, Michigan (ranking #7 of 138 jurisdictions in MI). Of those, 15 (0.9%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 49 (2.9%) have active non-compliance quarters.
Which ZIP codes and cities in Washtenaw County have the highest regulated facility density?
Within Washtenaw County, the highest concentrations of EPA-tracked facilities are located in ZIP 48103 (Ann Arbor, 316 sites), ZIP 48108 (Ann Arbor, 237 sites), ZIP 48197 (Ypsilanti, 216 sites), spanning municipal corridors including Ann Arbor (909 sites), Ypsilanti (400 sites), Chelsea (109 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Washtenaw County?
Across Washtenaw County, 1,524 facilities (90.6% 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 Washtenaw County, MI?
Geologic indoor air screening places Washtenaw 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 Washtenaw County, MI?
Federal records track 42 Safe Drinking Water (SDWIS) facilities, 202 Clean Water Act NPDES permits, and 180 impaired water dischargers in Washtenaw County, alongside 2 historical FEMA federal disaster declarations (2 flood/storm events).
Does Washtenaw County, MI have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Washtenaw County indicates a MODERATE shrink-swell risk signal and steel pipe corrosivity rated Low. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.