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2026 Rankings
Franklin County, Idaho Home Safety Rankings - 7 ZIPs
Explore rankings under Home Safety Score model 4.0.0. Only ZIPs with all four required inputs are ranked; missing evidence is not imputed or reweighted.
Franklin County, Idaho (Idaho) includes 7 tracked ZIP codes and 2 mapped community water systems; confirm service for a specific address. Below are the water quality rankings for metro ZIPs with all required inputs.
Average Home Safety Grade: B (79/100)
| Grade | ZIP Codes | % |
|---|---|---|
| A | 0 | 0% |
| B | 1 | 100% |
| C | 0 | 0% |
| D | 0 | 0% |
| F | 0 | 0% |
Top 10 ZIP Codes by Home Safety Score
| Rank | ZIP | City | Score | Grade |
|---|---|---|---|---|
| 1 | 83263 | Preston | 79 | B |
10 Riskiest ZIP Codes
| Rank | ZIP | City | Score | Grade | Risk Factor |
|---|---|---|---|---|---|
| 1 | 83263 | Preston | 79 | B | 11 violations |
Most Common Contaminant Violations
| Contaminant | Violations | ZIPs Affected |
|---|---|---|
| Consumer Confidence Report Rule | 4 | 2 |
| Groundwater Rule | 3 | 1 |
| Total Trihalomethanes (TTHM) | 2 | 2 |
| Haloacetic Acids (HAA5) | 2 | 2 |
| Stage 1 DBP Rule | 2 | 2 |
| E. coli | 1 | 1 |
| Chlorine residual | 1 | 1 |
| Revised Total Coliform Rule | 1 | 1 |
Lead Risk
- Average of reported 90th-percentile lead results: 0.0030 mg/L (below EPA action level)
- 0 of 2 ZIP codes with known status exceed EPA lead action level
- 35% of housing built before 1950
- 49% of housing built before 1970
Cities in This Metro
- Clifton, ID — 1 ZIP code
- Dayton, ID — 1 ZIP code
- Franklin, ID — 1 ZIP code
- Malad City, ID — 1 ZIP code
- Preston, ID — 1 ZIP code
- Swanlake, ID — 1 ZIP code
- Weston, ID — 1 ZIP code
All 7 ZIP Codes Ranked
View complete ranking
| Rank | ZIP | City | Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 83263 | Preston | 79 | B | 11 |
| 2 | 83228 | Clifton | — | — | — |
| 3 | 83232 | Dayton | — | — | — |
| 4 | 83237 | Franklin | — | — | 5 |
| 5 | 83252 | Malad City | — | — | — |
| 6 | 83281 | Swanlake | — | — | — |
| 7 | 83286 | Weston | — | — | — |
Data Sources
- Water quality: EPA SDWIS
- Housing: U.S. Census Bureau American Community Survey
- Flood: FEMA NFIP
- Flood scope: historical NFIP claim records and claim-rated-zone evidence; this is not current property-map coverage.
Reporting periods vary by source; the page metadata identifies this materialization.
Methodology
Model 4.0.0 averages SDWIS water compliance and UCMR5 PFAS within drinking water, then averages drinking water, county radon, and annual AQI as three equal domains. All four inputs are required. Score methodology → · Rankings methodology →
Model 4.0.0 averages SDWIS water compliance and UCMR5 PFAS within drinking water, then averages drinking water, county radon, and annual AQI as three equal domains. All four inputs are required. Score methodology → · Rankings methodology →
Disclaimer: Scores are based on EPA SDWIS reported data and are not a guarantee of current water safety. Water quality can change. For the most current information, contact your local water utility or request a Consumer Confidence Report.
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How to cite this page
APA
ZipCheckup. (2026). Franklin County, Idaho Home Safety Rankings - 7 ZIPs. https://zipcheckup.com/rankings/metro/franklin-idaho/
BibTeX
@misc{zipcheckup-rankings-metro-franklin-idaho,
author = {{ZipCheckup}},
title = {{Franklin County, Idaho Home Safety Rankings - 7 ZIPs}},
year = {2026},
url = {https://zipcheckup.com/rankings/metro/franklin-idaho/}
}
Page version: October 2026.
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