Sullivan County, Tennessee
14 ZIP codes · Avg score 59/100 · Grade C · Updated 2026-06-03
While Sullivan County avoids the worst tiers, a portion of its 14 ZIP codes have logged violations.
How Sullivan County Compares
How Sullivan County Compares
Sullivan County scores 10 points below the Tennessee state average (69/100) and 9 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Sullivan County, Tennessee
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 15.6 (asthma 11.2%, diabetes 15%)
Estimated additional annual cost per homeowner: $882, driven primarily by flood
Infrastructure: 0.321% avg pipe failure probability, 8% of ZIPs at high risk
59.7% of homes built before 1978 (lead paint era)
Violation History (2022–2025)
→ Stable trendEPA violation counts by year across Sullivan County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 3 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: $882
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
79,242 housing units in Sullivan 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 Sullivan County
Remediation costs are relatively manageable for most homeowners in Sullivan 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 Sullivan 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 Sullivan County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Bristol Department of Utilities | 37,648 | 26 |
| 2 | Bristol-bluff City U.d. | 6,268 | 26 |
| 3 | South Fork Utility District | 7,645 | 26 |
| 4 | KINGSPORT WATER DEPT | 106,765 | 24 |
| 5 | Bloomingdale Utility District | 13,318 | 24 |
14 total water systems serve Sullivan County.
All ZIP Codes in Sullivan County
14 ZIP codes tracked in Sullivan County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 37617 | Blountville | 65 | C | 0 | $225K |
| 2 | 37625 | Bristol | 63 | C | 6 | — |
| 3 | 37662 | Kingsport | 63 | C | 3 | — |
| 4 | 37665 | Kingsport | 63 | C | 3 | $110K |
| 5 | 37669 | Kingsport | 63 | C | 3 | — |
| 6 | 37663 | Kingsport | 62 | C | 3 | $225K |
| 7 | 37664 | Kingsport | 62 | C | 3 | $205K |
| 8 | 37618 | Bluff City | 60 | C | 8 | $174K |
| 9 | 37621 | Bristol | 59 | C | 6 | — |
| 10 | 37620 | Bristol | 58 | C | 6 | $176K |
| 11 | 37660 | Kingsport | 57 | C | 3 | $178K |
| 12 | 37656 | Fall Branch | 53 | D | 0 | $232K |
| 13 | 37686 | Piney Flats | 53 | D | 0 | $306K |
| 14 | 37699 | Piney Flats | 40 | D | 0 | — |
Recommended Buyer Guides for Sullivan County
Editorial-only picks, screened against the EPA detections on file.
- Best Lead Paint Test Kits — 59.7% of homes built before 1978
- 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 Sullivan County, Tennessee
Overview
Sullivan County in Tennessee covers 14 ZIP codes with an average Home Safety Score of C (59/100).
10 of 14 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.