Rockwall County, Texas
3 ZIP codes · Avg score 91/100 · Grade A · Updated 2026-06-03
Covering 3 ZIP codes, Rockwall County earns a high grade for tap water — most systems report zero health-based violations, and the overall compliance rate comfortably exceeds federal benchmarks.
How Rockwall County Compares
How Rockwall County Compares
Rockwall County scores 9 points above the Texas state average (82/100) and 23 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
Key Risk Factors
Health risk index: 10.9 (asthma 9.7%, diabetes 9.4%)
Estimated additional annual cost per homeowner: $697, driven primarily by flood
Infrastructure: 0.25% avg pipe failure probability
18.5% of homes built before 1978 (lead paint era)
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: $697
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
27,440 housing units in Rockwall 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 Rockwall County
Remediation costs are relatively manageable for most homeowners in Rockwall 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 Rockwall 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 Rockwall County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Fate | 29,285 | 27 |
| 2 | Blackland Water Supply Corporation | 5,217 | 27 |
| 3 | City of Rockwall | 47,251 | 20 |
| 4 | R C H Water Supply Corporation | 7,863 | 20 |
| 5 | Forney Lake Water Supply Corporation | 16,188 | 20 |
11 total water systems serve Rockwall County.
All ZIP Codes in Rockwall County
3 ZIP codes tracked in Rockwall County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 75132 | Fate | 96 | A | 7 | — |
| 2 | 75032 | Rockwall | 89 | A | 10 (1 health) | $462K |
| 3 | 75087 | Rockwall | 89 | A | 10 (1 health) | $400K |
Recommended Buyer Guides for Rockwall County
Independent picks. EPA-grounded. Matched here.
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Overview
Rockwall County in Texas covers 3 ZIP codes with an average Home Safety Score of A (91/100).
3 of 3 ZIP codes have recorded EPA violations. 2 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.