McLennan County, Texas
31 ZIP codes · Avg score 86/100 · Grade A · Updated 2026-06-03
Within McLennan County's 31 tracked ZIP codes, safety indicators remain above the national average with few health-based violations on record.
How McLennan County Compares
How McLennan County Compares
McLennan County scores 4 points above the Texas state average (82/100) and 18 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: McLennan County, Texas
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.6 (asthma 10.4%, diabetes 12.5%)
Estimated additional annual cost per homeowner: $1,013, driven primarily by flood
Infrastructure: 0.325% avg pipe failure probability, 13% of ZIPs at high risk
56.5% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across McLennan County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 41 violations. Past 5 years: 100 total (100 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
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,013
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
104,866 housing units in McLennan 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 McLennan County
Remediation costs are relatively manageable for most homeowners in McLennan 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 McLennan 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 McLennan County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Waco | 146,241 | 187 |
| 2 | Gholson Water Supply Corporation | 3,903 | 171 |
| 3 | West Brazos Water Supply Corporation | 2,880 | 160 |
| 4 | Chalk Bluff Water Supply Corporation | 3,852 | 154 |
| 5 | Texas State Technical College - Waco | 6,533 | 153 |
49 total water systems serve McLennan County.
All ZIP Codes in McLennan County
31 ZIP codes tracked in McLennan County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 76524 | Eddy | 95 | A | 0 | $200K |
| 2 | 76702 | Waco | 95 | A | 9 | — |
| 3 | 76703 | Waco | 95 | A | 9 | — |
| 4 | 76715 | Waco | 95 | A | 9 | — |
| 5 | 76716 | Waco | 95 | A | 9 | — |
| 6 | 76795 | Waco | 95 | A | 9 | — |
| 7 | 76797 | Waco | 95 | A | 9 | — |
| 8 | 76798 | Waco | 95 | A | 9 | — |
| 9 | 76799 | Waco | 95 | A | 9 | — |
| 10 | 76655 | Lorena | 94 | A | 7 (1 health) | $295K |
| 11 | 76633 | China Spring | 92 | A | 3 | $348K |
| 12 | 76701 | Waco | 91 | A | 9 | — |
| 13 | 76704 | Waco | 91 | A | 9 | $113K |
| 14 | 76714 | Waco | 91 | A | 9 | — |
| 15 | 76643 | Hewitt | 90 | A | 0 | $252K |
| 16 | 76712 | Woodway | 89 | A | 2 | $302K |
| 17 | 76684 | Ross | 87 | A | 2 | — |
| 18 | 76705 | Waco | 86 | A | 9 | $167K |
| 19 | 76707 | Waco | 86 | A | 9 | $114K |
| 20 | 76708 | Waco | 86 | A | 9 | $205K |
| 21 | 76711 | Waco | 86 | A | 9 | $113K |
| 22 | 76640 | Elm Mott | 85 | A | 1 | $178K |
| 23 | 76638 | Crawford | 84 | B | 7 (3 health) | $376K |
| 24 | 76657 | Mc Gregor | 81 | B | 22 | $368K |
| 25 | 76706 | Waco | 81 | B | 9 | $181K |
| 26 | 76710 | Waco | 81 | B | 9 | $229K |
| 27 | 76664 | Mart | 79 | B | 6 (2 health) | $134K |
| 28 | 76691 | West | 73 | B | 18 | $230K |
| 29 | 76630 | Bruceville | 66 | C | 0 | $209K |
| 30 | 76682 | Riesel | 62 | C | 42 (34 health) | $157K |
| 31 | 76654 | Leroy | 55 | C | 15 (15 health) | $159K |
Recommended Buyer Guides for McLennan County
Eight risk categories drive the selection — PFAS exceedance, lead above EPA action level, pre-1978 housing share, EPA Radon Zone 1, flood-top-risk, wildfire-top-risk, multi-contaminant load, and a baseline fallback — and each category maps to a specific buyer-guide track that surfaces when the county data hits its threshold for that hazard signal.
- Best Lead Paint Test Kits — 56.5% 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 McLennan County, Texas
Overview
McLennan County in Texas covers 31 ZIP codes with an average Home Safety Score of A (86/100).
28 of 31 ZIP codes have recorded EPA violations. 55 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.