Coryell County, Texas
13 ZIP codes · Avg score 74/100 · Grade B · Updated 2026-06-03
Covering 13 ZIP codes, Coryell 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 Coryell County Compares
How Coryell County Compares
Coryell County scores 8 points below the Texas state average (82/100) and 6 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Coryell County, Texas
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.8 (asthma 10.4%, diabetes 10.3%)
Estimated additional annual cost per homeowner: $691, driven primarily by wildfire
Infrastructure: 0.364% avg pipe failure probability, 42% of ZIPs at high risk
Violation History (2021–2025)
→ Stable trendEPA violation counts by year across Coryell County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 48 violations. Past 5 years: 141 total (141 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: $691
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Coryell County
Remediation costs are relatively manageable for most homeowners in Coryell 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 Coryell 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 Coryell County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Coryell City Water Supply District | 6,042 | 172 |
| 2 | Multi-county Water Supply Corporation | 4,302 | 148 |
| 3 | City of Gatesville | 16,135 | 140 |
| 4 | Fort Gates Water Supply Corporation | 2,500 | 140 |
| 5 | Mountain Water Supply Corporation | 2,400 | 140 |
25 total water systems serve Coryell County.
All ZIP Codes in Coryell County
13 ZIP codes tracked in Coryell County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 76525 | Evant | 94 | A | 7 | $118K |
| 2 | 76561 | Oglesby | 94 | A | 2 | $142K |
| 3 | 76526 | Flat | 87 | A | 5 (1 health) | — |
| 4 | 76522 | Copperas Cove | 85 | A | 1 | $174K |
| 5 | 76689 | Valley Mills | 77 | B | 22 (2 health) | $229K |
| 6 | 76538 | Jonesboro | 66 | C | 0 | $126K |
| 7 | 76558 | Mound | 66 | C | 0 | — |
| 8 | 76566 | Purmela | 66 | C | 0 | $240K |
| 9 | 76596 | Gatesville | 66 | C | 28 (16 health) | — |
| 10 | 76597 | Gatesville | 66 | C | 28 (16 health) | — |
| 11 | 76598 | Gatesville | 66 | C | 28 (16 health) | — |
| 12 | 76599 | Gatesville | 66 | C | 28 (16 health) | — |
| 13 | 76528 | Gatesville | 65 | C | 28 (16 health) | $190K |
Recommended Buyer Guides for Coryell County
While many sites publish identical guide lists across every county they cover, the selection here changes by location — driven by the EPA, NSF, FEMA, and CDC datasets that describe the actual conditions documented for this jurisdiction in the federal record.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best HEPA Air Purifiers for Wildfire Smoke — Wildfire is the top compound risk factor
Deep Dive Reports
Detailed analysis for Coryell County, Texas
Overview
Coryell County in Texas covers 13 ZIP codes with an average Home Safety Score of B (74/100).
10 of 13 ZIP codes have recorded EPA violations. 83 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.