Colorado County, Texas
15 ZIP codes · Avg score 78/100 · Grade B · Updated 2026-06-03
The 15 water systems serving Colorado County show strong compliance with federal drinking water standards.
How Colorado County Compares
How Colorado County Compares
Colorado County scores 4 points below the Texas state average (82/100) and 10 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Colorado County, Texas
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14 (asthma 9.8%, diabetes 14.8%)
Estimated additional annual cost per homeowner: $1,135, driven primarily by flood
Infrastructure: 0.322% avg pipe failure probability, 8% of ZIPs at high risk
51% 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: $1,135
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
13,957 housing units in Colorado 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 Colorado County
Remediation costs are relatively manageable for most homeowners in Colorado 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 Colorado 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 Colorado County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Sheridan Water Supply Corporation | 414 | 50 |
| 2 | Lake Sheridan Estates | 750 | 39 |
| 3 | Key Largo Utilities | 105 | 39 |
| 4 | CITY OF COLUMBUS | 3,739 | 22 |
| 5 | Glidden Fwsd 1 | 855 | 20 |
16 total water systems serve Colorado County.
All ZIP Codes in Colorado County
15 ZIP codes tracked in Colorado County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 77475 | Sheridan | 93 | A | 39 (2 health) | $215K |
| 2 | 78934 | Columbus | 89 | A | 20 (1 health) | $215K |
| 3 | 78950 | New Ulm | 87 | A | 0 | $305K |
| 4 | 77434 | Eagle Lake | 85 | A | 5 | $107K |
| 5 | 77470 | Rock Island | 85 | A | 2 | — |
| 6 | 77442 | Garwood | 83 | B | 9 (1 health) | $230K |
| 7 | 78962 | Weimar | 83 | B | 2 | $223K |
| 8 | 77412 | Altair | 73 | B | 0 | — |
| 9 | 77460 | Nada | 73 | B | 0 | — |
| 10 | 78933 | Cat Spring | 73 | B | 0 | $375K |
| 11 | 78935 | Alleyton | 73 | B | 0 | — |
| 12 | 78956 | Schulenburg | 73 | B | 0 | $231K |
| 13 | 77454 | Lissie | 66 | C | 0 | — |
| 14 | 78943 | Glidden | 66 | C | 0 | — |
| 15 | 78951 | Oakland | 66 | C | 0 | — |
Recommended Buyer Guides for Colorado County
Editorial-only picks, screened against the EPA detections on file.
- Best Lead Paint Test Kits — 51% 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
Deep Dive Reports
Detailed analysis for Colorado County, Texas
Overview
Colorado County in Texas covers 15 ZIP codes with an average Home Safety Score of B (78/100).
6 of 15 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.