Franklin County, Tennessee
12 ZIP codes · Avg score 86/100 · Grade A · Updated 2026-06-03
Within Franklin County's 12 tracked ZIP codes, safety indicators remain above the national average with few health-based violations on record.
How Franklin County Compares
How Franklin County Compares
Franklin County scores 17 points above the Tennessee state average (69/100) and 18 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Franklin County, Tennessee
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.9 (asthma 11%, diabetes 14.1%)
Estimated additional annual cost per homeowner: $626, driven primarily by energy_code_gap
Infrastructure: 0.292% avg pipe failure probability
53.6% of homes built before 1978 (lead paint era)
Violation History (2023–2024)
→ Stable trendEPA violation counts by year across Franklin County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 2 violations. Past 5 years: 4 total (4 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $626
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
32,172 housing units in Franklin County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Franklin County
Remediation costs are relatively manageable for most homeowners in Franklin County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Franklin County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Franklin County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Metro Lynchburg/moore Company U.d. #1 | 7,895 | 19 |
| 2 | Decherd Water Department | 4,809 | 19 |
| 3 | Belvidere Rural U.d. | 1,716 | 17 |
| 4 | Winchester Water System | 24,899 | 16 |
| 5 | Cowan Board of Public Utilities | 2,587 | 16 |
21 total water systems serve Franklin County.
All ZIP Codes in Franklin County
12 ZIP codes tracked in Franklin County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 37383 | Sewanee | 99 | A | 0 | — |
| 2 | 37318 | Cowan | 95 | A | 0 | $132K |
| 3 | 37375 | Sewanee | 95 | A | 0 | $324K |
| 4 | 37330 | Estill Springs | 94 | A | 3 | $192K |
| 5 | 37324 | Decherd | 93 | A | 1 | $208K |
| 6 | 37345 | Huntland | 93 | A | 2 | $183K |
| 7 | 37306 | Belvidere | 91 | A | 3 | $226K |
| 8 | 37388 | Tullahoma | 90 | A | 1 | $231K |
| 9 | 37398 | Winchester | 81 | B | 12 | $225K |
| 10 | 37335 | Flintville | 73 | B | 0 | $209K |
| 11 | 37328 | Elora | 66 | C | 0 | $142K |
| 12 | 37376 | Sherwood | 66 | C | 0 | $88K |
Recommended Buyer Guides for Franklin County
While many sites publish identical guide lists across every county they cover, the selection here changes by location — driven by the EPA, NSF, FEMA, and CDC datasets that describe the actual conditions documented for this jurisdiction in the federal record.
- Best Water Filters for PFAS — PFAS detected in 1 ZIP code
- Best Lead Paint Test Kits — 53.6% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Franklin County, Tennessee
Overview
Franklin County in Tennessee covers 12 ZIP codes with an average Home Safety Score of A (86/100).
6 of 12 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← Back to Tennessee water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.