Nolan County, Texas
3 ZIP codes · Avg score 81/100 · Grade B · Updated 2026-06-03
Nolan County's tap water quality puts it in the upper tier nationally; the 3 ZIP codes here record few health-based violations.
How Nolan County Compares
How Nolan County Compares
Nolan County scores 1 points below the Texas state average (82/100) and 13 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
Key Risk Factors
Health risk index: 15.2 (asthma 10.2%, diabetes 16.5%)
Estimated additional annual cost per homeowner: $2,273, driven primarily by flood
Infrastructure: 0.457% avg pipe failure probability, 67% of ZIPs at high risk
81.3% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
→ Stable trendEPA violation counts by year across Nolan County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 3 violations. Past 5 years: 6 total (6 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: $2,273
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
7,539 housing units in Nolan 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 Nolan County
Water safety remediation is a moderate expense relative to home values. Most homeowners can address issues through staged improvements over time.
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 Nolan 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 Nolan County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Sweetwater | 12,401 | 26 |
| 2 | Bitter Creek Water Supply Corporation South | 2,973 | 26 |
| 3 | City of Roscoe | 1,238 | 15 |
| 4 | Sylvester Mccaulley Water Supply Corporation | 717 | 11 |
| 5 | Nolan County Fwsd 1 | 258 | 1 |
6 total water systems serve Nolan County.
All ZIP Codes in Nolan County
3 ZIP codes tracked in Nolan County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 79506 | Blackwell | 97 | A | 1 | $113K |
| 2 | 79556 | Sweetwater | 91 | A | 11 (1 health) | $98K |
| 3 | 79545 | Roscoe | 56 | C | 15 (3 health) | $101K |
Recommended Buyer Guides for Nolan County
Strictly editorial — no paid placements influence which guides appear; the selection draws on NSF certifications and EPA detection records for water systems serving this county.
- Best Water Filters for Lead — Lead above EPA action level in 1 ZIP code
- Best Lead Paint Test Kits — 81.3% of homes built before 1978
- 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
Overview
Nolan County in Texas covers 3 ZIP codes with an average Home Safety Score of B (81/100).
3 of 3 ZIP codes have recorded EPA violations. 4 health-based violations have been documented.
← Back to Texas 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.