Rhea County, Tennessee
5 ZIP codes · Avg score 80/100 · Grade B · Updated 2026-06-03
For households in Rhea County, the 5 ZIP codes on record show consistently safe tap water.
How Rhea County Compares
How Rhea County Compares
Rhea County scores 11 points above the Tennessee state average (69/100) and 12 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Rhea County, Tennessee
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 16.6 (asthma 11.1%, diabetes 15.7%)
Estimated additional annual cost per homeowner: $1,020, driven primarily by flood
Infrastructure: 0.284% avg pipe failure probability
43% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
→ Stable trendEPA violation counts by year across Rhea County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 6 violations. Past 5 years: 18 total (18 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: $1,020
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
16,995 housing units in Rhea 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 Rhea County
Remediation costs are relatively manageable for most homeowners in Rhea 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 Rhea 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 Rhea County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Dayton Water Department | 25,054 | 22 |
| 2 | NORTHWEST UTILITY DISTRICT | 20,794 | 22 |
| 3 | Graysville Water Department | 1,888 | 18 |
| 4 | Watts Bar Utility District | 15,571 | 16 |
| 5 | Laurelbrook School | 150 | 12 |
12 total water systems serve Rhea County.
All ZIP Codes in Rhea County
5 ZIP codes tracked in Rhea County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 37321 | Dayton | 88 | A | 12 (2 health) | $168K |
| 2 | 37381 | Spring City | 87 | A | 4 | $209K |
| 3 | 37338 | Graysville | 86 | A | 6 (4 health) | $122K |
| 4 | 37332 | Evensville | 73 | B | 0 | $189K |
| 5 | 37337 | Grandview | 66 | C | 0 | $164K |
Recommended Buyer Guides for Rhea County
Where county records show a lead exceedance or pre-1978 housing concentration, lead-specific filters and test kits move toward the top of the list.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- 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 Rhea County, Tennessee
Overview
Rhea County in Tennessee covers 5 ZIP codes with an average Home Safety Score of B (80/100).
3 of 5 ZIP codes have recorded EPA violations. 6 health-based violations have been documented.
← 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.