Ada County, Idaho — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
In Ada County, Idaho, public U.S. EPA records track 1,886 regulated facilities (#1 of 83 in Idaho), including 28 (1.5%) High-Risk sites and $17,201,710 in federal penalties. Countywide due diligence also covers 125 Safe Drinking Water (SDWIS) facilities, 2,413 Clean Water NPDES permits, 1 FEMA Federal Disaster Declarations (0 flood/storm), USDA Soil Foundation Shrink-Swell (HIGH signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Ada County, ID 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Ada County, ID Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)Municipalities in Ada County
ZIP Codes in Ada County
Top EPA Regulated Facilities in Ada County, ID
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 • BOISE, ID (ZIP 83705 Sector) | HIGH (70/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • MERIDIAN, ID (ZIP 83642 Sector) | HIGH (64/100) | Violation Identified (12 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • KUNA, ID (ZIP 83634 Sector) | HIGH (64/100) | Violation Identified (1 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • EAGLE, ID (ZIP 83616 Sector) | HIGH (64/100) | Significant Violation (8 qtrs NC) | 🔒 8 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • KUNA, ID (ZIP 83634 Sector) | HIGH (64/100) | Significant Violation (8 qtrs NC) | 🔒 8 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • BOISE, ID (ZIP 83705 Sector) | HIGH (64/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • BOISE, ID (ZIP 83716 Sector) | HIGH (64/100) | Significant Violation (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • EAGLE, ID (ZIP 83616 Sector) | HIGH (64/100) | Significant Violation (4 qtrs NC) | 🔒 4 Qtrs Non-Compliance • Unlock → |
| RIVIAN AUTOMOTIVE (BOISE) FREE PREVIEW (LOW RISK) | 700 N FIVE MILE RD, BOISE, ID 83704 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| ZILOG INC IDAHO TECHNOLOGY CENTER FREE PREVIEW (LOW RISK) | 625 S STRATFORD STE 100, MERIDIAN, ID 83642 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| CITY OF BOISE GOWEN AREA PCE FREE PREVIEW (LOW RISK) | 3883 S. ORCHARD ST., BOISE, ID 83705 | LOW (15/100) | No Violation Identified (0 qtrs NC) | $0 |
| CAPITOL LITHOGRAPHY & PRINTING FREE PREVIEW (LOW RISK) | 610 W IDAHO ST, BOISE, ID 83702 | LOW (15/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Ada County, Idaho Environmental Due Diligence
How many EPA-regulated environmental sites are in Ada County, Idaho?
Public U.S. EPA records track 1,886 regulated facilities in Ada County, Idaho (ranking #1 of 83 jurisdictions in ID). Of those, 28 (1.5%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 67 (3.6%) have active non-compliance quarters.
Which ZIP codes and cities in Ada County have the highest regulated facility density?
Within Ada County, the highest concentrations of EPA-tracked facilities are located in ZIP 83642 (Meridian, 759 sites), ZIP 83705 (Boise, 264 sites), ZIP 83702 (Boise, 260 sites), spanning municipal corridors including Boise (1,891 sites), Kuna (233 sites), City Of Star (10 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Ada County?
Across Ada County, 817 facilities (43.3% 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 Ada County, ID?
Geologic indoor air screening places Ada 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 Ada County, ID?
Federal records track 125 Safe Drinking Water (SDWIS) facilities, 2,413 Clean Water Act NPDES permits, and 811 impaired water dischargers in Ada County, alongside 1 historical FEMA federal disaster declarations (0 flood/storm events).
Does Ada County, ID have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Ada County indicates a HIGH shrink-swell risk signal and steel pipe corrosivity rated Moderate. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.