Washington County, Tennessee
11 ZIP codes · Home Safety Score unavailable · 0 of 11 tracked ZIP records scored · Updated
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:
ZIP Code Risk Map
Water Quality Map: Washington 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 (asthma 10.9%, diabetes 12.8%)
Estimated additional annual cost per homeowner: $802, driven primarily by flood
41.4% of homes built before 1978 (lead paint era)
Violation History (2022–2025)
→ Stable trendEPA violation counts by year across Washington County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 6 violations. Past 5 years: 12 total (12 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
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $802
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
66,076 housing units in Washington 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 Washington County
Remediation costs are relatively manageable for most homeowners in Washington 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 Washington County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Washington County
8 community water systems serving Washington County.
Show all 8 water systems
9 total water systems serve Washington County.
Systems with the most violations in Washington County
5 water systems with recorded EPA violations.
All ZIP Codes in Washington County
11 ZIP codes tracked in Washington County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 37601 | Johnson City | — | — | 6 | $187K |
| 2 | 37602 | Johnson City | — | — | — | |
| 3 | 37604 | Johnson City | — | — | 7 (1 health) | $232K |
| 4 | 37605 | Johnson City | — | — | — | |
| 5 | 37614 | Johnson City | — | — | 5 | — |
| 6 | 37615 | Johnson City | — | — | 8 (1 health) | $261K |
| 7 | 37656 | Fall Branch | — | — | 19 (4 health) | $232K |
| 8 | 37659 | Jonesborough | — | — | 20 (4 health) | $242K |
| 9 | 37681 | Limestone | — | — | 11 (1 health) | $170K |
| 10 | 37684 | Mountain Home | — | — | — | |
| 11 | 37690 | Telford | — | — | 9 (1 health) | $221K |
Recommended Buyer Guides for Washington County
Federal and certification sources drive the ordering: EPA monitoring data, NSF certifications, FEMA flood maps, and CDC lead guidance - guides surface only when county data warrants them.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Washington County, Tennessee
Overview
Washington County in Tennessee covers 11 tracked ZIP records. No Home Safety Score is published because the required model evidence is incomplete for every tracked record; missing evidence is not treated as zero.
8 of 8 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 4 health-based violations appear in the available health breakdown.
← Back to Tennessee Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.