Harrison County, Texas
12 ZIP codes · Avg score 82/100 · Grade B · Updated 2026-06-03
Harrison County — 12 ZIP codes, above-average safety grade.
How Harrison County Compares
How Harrison County Compares
Harrison County scores 0 points above the Texas state average (82/100) and 14 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Harrison County, Texas
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.1 (asthma 10.7%, diabetes 13.8%)
Estimated additional annual cost per homeowner: $954, driven primarily by flood
Infrastructure: 0.37% avg pipe failure probability, 40% of ZIPs at high risk
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Harrison County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 29 violations. Past 5 years: 90 total (90 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: $954
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 Harrison County
Remediation costs are relatively manageable for most homeowners in Harrison 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 Harrison 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 Harrison County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | North Harrison Water Supply Corporation | 1,575 | 123 |
| 2 | Cypress Valley Water Supply Corporation Plant 1 | 771 | 112 |
| 3 | Cypress Valley Water Supply Corporation Plant 2 | 705 | 110 |
| 4 | City of Marshall | 23,091 | 84 |
| 5 | Gill Water Supply Corporation | 2,640 | 75 |
25 total water systems serve Harrison County.
All ZIP Codes in Harrison County
12 ZIP codes tracked in Harrison County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 75642 | Elysian Fields | 98 | A | 43 (1 health) | — |
| 2 | 75651 | Harleton | 98 | A | 9 (1 health) | $189K |
| 3 | 75650 | Hallsville | 94 | A | 2 (1 health) | $192K |
| 4 | 75671 | Marshall | 91 | A | 21 (4 health) | — |
| 5 | 75670 | Marshall | 86 | A | 21 (4 health) | $100K |
| 6 | 75672 | Marshall | 86 | A | 21 (4 health) | $167K |
| 7 | 75688 | Scottsville | 85 | A | 1 | — |
| 8 | 75692 | Waskom | 82 | B | 10 | $143K |
| 9 | 75661 | Karnack | 74 | B | 11 (3 health) | $110K |
| 10 | 75659 | Jonesville | 66 | C | 0 | — |
| 11 | 75685 | Panola | 66 | C | 0 | — |
| 12 | 75694 | Woodlawn | 55 | C | 59 (22 health) | — |
Recommended Buyer Guides for Harrison County
Filtered against EPA monitoring data and CDC lead-exposure guidance, the guides below skip the generic catalog and connect directly to the contaminants and hazards on file here.
- 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 Harrison County, Texas
Overview
Harrison County in Texas covers 12 ZIP codes with an average Home Safety Score of B (82/100).
10 of 12 ZIP codes have recorded EPA violations. 40 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.