Galveston County, Texas
29 ZIP codes · Avg score 92/100 · Grade A · Updated
ZipCheckup grade for Galveston County: A.
No federal data flags a major home-safety concern for this ZIP.
Water utilities serving Galveston County's 29 ZIP codes have built a consistent compliance record - the county's above-average grade reflects years of data showing low violation rates and no systemic health concerns.
How Galveston County Compares
How Galveston County Compares
Galveston County scores 9 points above the Texas state average (83/100) and 19 points above the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:
ZIP Code Risk Map
Water Quality Map: Galveston County, Texas
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.3 (asthma 9.8%, diabetes 12.3%)
Estimated additional annual cost per homeowner: $4,727, driven primarily by sea_level
47.1% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Galveston County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 21 violations. Past 5 years: 63 total (63 health-based). Health-based violations are rising versus the prior 2-year window - worth closer monitoring.
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
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $4,727
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
172,395 housing units in Galveston 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 Galveston County
Remediation costs are relatively manageable for most homeowners in Galveston 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 Galveston County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Galveston County
8 community water systems serving Galveston County.
- B
- A
- A
- A
- B
- A
Show all 8 water systems
- A
- A
35 total water systems serve Galveston County.
Systems with the most violations in Galveston County
5 water systems with recorded EPA violations.
- B
All ZIP Codes in Galveston County
29 ZIP codes tracked in Galveston County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 77565 | Kemah | 100 | A | 1 | $377K |
| 2 | 77617 | Gilchrist | 99 | A | 2 | — |
| 3 | 77623 | High Island | 99 | A | 2 | — |
| 4 | 77650 | Port Bolivar | 99 | A | 2 | $364K |
| 5 | 77546 | Friendswood | 98 | A | 5 (1 health) | $354K |
| 6 | 77550 | Galveston | 98 | A | 3 | $284K |
| 7 | 77551 | Galveston | 98 | A | 3 | $278K |
| 8 | 77555 | Galveston | 98 | A | 3 | — |
| 9 | 77518 | Bacliff | 97 | A | 6 | $168K |
| 10 | 77590 | Texas City | 92 | A | 11 (1 health) | $168K |
| 11 | 77539 | Dickinson | 83 | B | 25 (5 health) | $246K |
| 12 | 77554 | Galveston | 83 | B | 21 (2 health) | $431K |
| 13 | 77563 | Hitchcock | 83 | B | 31 (10 health) | $199K |
| 14 | 77568 | La Marque | 83 | B | 23 (6 health) | $209K |
| 15 | 77573 | League City | 83 | B | 0 | $342K |
| 16 | 77836 | Caldwell | 83 | B | 62 (2 health) | $199K |
| 17 | 75265 | Dallas | — | — | — | |
| 18 | 75764 | Gallatin | — | — | $99K | |
| 19 | 76624 | Axtell | — | — | 132 (97 health) | $147K |
| 20 | 76632 | Chilton | — | — | 17 (2 health) | $95K |
| 21 | 77510 | Santa Fe | — | — | 32 (6 health) | $281K |
| 22 | 77517 | Santa Fe | — | — | 14 (1 health) | $266K |
| 23 | 77549 | Friendswood | — | — | — | |
| 24 | 77552 | Galveston | — | — | — | |
| 25 | 77553 | Galveston | — | — | — | |
| 26 | 77574 | League City | — | — | — | |
| 27 | 77591 | Texas City | — | — | 5 (1 health) | $205K |
| 28 | 77592 | Texas City | — | — | — | |
| 29 | 77850 | Concord | — | — | — |
Recommended Buyer Guides for Galveston County
Editorial-only picks, screened against the EPA detections on file.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Galveston County, Texas
Overview
Galveston County in Texas covers 29 tracked ZIP records with an average Home Safety Score of A (92/100) across 16 scored records.
20 of 21 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 114 health-based violations appear in the available health breakdown.
← Back to Texas Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.