Is San Tan Valley, AZ Safe to Buy? Home Safety Score 65/100
Score 65/100 · Risk: low · Home Safety Grade C · Updated
San Tan Valley has low overall risk for homebuyers. Most safety indicators are within acceptable ranges.
Score data: EPA SDWIS, EPA PFAS monitoring, EPA Radon Zones, EPA Air Quality Index Last verified:
What is a home safety score?
Home Safety Score model 4.0.0 combines EPA SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, UCMR5 PFAS, EPA radon zone, and annual AQI with complete coverage. San Tan Valley scores 65/100 with a "low" risk level.
Per-ZIP Home Safety Scores
Safety scores vary across San Tan Valley's 2 ZIP codes.
| ZIP Code | Score | Grade | |
|---|---|---|---|
| 85140 | 64 | C | View report → |
| 85143 | 65 | C | View report → |
Home Safety Overview
San Tan Valley, Arizona has low overall risk under the current model. The average Home Safety Score is 65/100 across 2 ZIP codes. The model covers water compliance, PFAS screening, radon, and annual air quality; property-level conditions still require inspection.
Safety Score Card
A composite view of San Tan Valley's key risk indicators:
| Risk Factor | Value | Assessment |
|---|---|---|
| Water Compliance | 35 EPA violations across 2 direct ZIP records | Recorded violations |
| Lead Risk | 0.0000 mg/L | Low risk |
| Flood Risk | 0% of claim-record ZIPs have A/V-family dominant recorded rated zones | Historical claims evidence |
| Radon | Zone 2 (Moderate) | Moderate risk |
| Air Quality | AQI 26 (Good) | Low risk |
San Tan Valley vs. Nearby Arizona Cities
How San Tan Valley's overall risk compares to similar cities in Arizona:
| City | Home Safety Grade | Lead ZIPs Over Limit | Flood Claims | Population |
|---|---|---|---|---|
| San Tan Valley | C | 0 | 3 | 92,595 |
| Flagstaff | C | 0 | 144 | 95,135 |
| Queen Creek | D | 0 | 13 | 87,201 |
| Avondale | C | 0 | 12 | 85,807 |
Homebuyer Safety Checklist for San Tan Valley
Before purchasing a home in San Tan Valley, Arizona, complete these checks:
Water Quality
- Request the latest Consumer Confidence Report (CCR) from the water utility
- Test tap water for lead, bacteria, and nitrates ($20-$50 for DIY kit)
Radon
- Conduct a radon test ($15-$30 for short-term kit, $150-$300 for professional)
- San Tan Valley is in Radon Zone 2 (Moderate risk) - testing is strongly recommended
Flood Risk
- Check the property's FEMA flood zone at msc.fema.gov
- Ask about flood history and past insurance claims
- Review the claims-only zone evidence: 0% of ZIPs with NFIP claim records have A/V-family dominant recorded rated zones. This does not replace an address-level FEMA map check.
Lead Paint & Pipes
- For homes built before 1978: request lead paint disclosure
- For homes built before 1986: inspect plumbing for lead solder and pipes
General
- Check for carbon monoxide detectors on every level
- Inspect for visible mold, water stains, or musty odors
- Verify the home's connection to a regulated public water system
Data Sources
- Water quality: EPA SDWIS
- Lead: EPA Lead and Copper Rule
- Flood: FEMA NFIP
- Radon: EPA Radon Zones
- Air quality: EPA AirNow
- Home values: U.S. Census Bureau ACS B25077
- Remediation costs: National cost model (EPA, Census, FEMA data)
Source reporting periods vary. See each cited source for its publication schedule.
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