Marshall County, Alabama
10 ZIP codes · Avg score 72/100 · Grade B · Updated 2026-06-03
Within Marshall County's 10 tracked ZIP codes, safety indicators remain above the national average with few health-based violations on record.
How Marshall County Compares
How Marshall County Compares
Marshall County scores 1 points below the Alabama state average (73/100) and 4 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Marshall County, Alabama
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.8 (asthma 9.8%, diabetes 14.6%)
Estimated additional annual cost per homeowner: $344, driven primarily by flood
Infrastructure: 0.283% avg pipe failure probability
48% 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: $344
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
38,305 housing units in Marshall 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 Marshall County
Remediation costs are relatively manageable for most homeowners in Marshall 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 Marshall 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 Marshall County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Douglas Water Authority | 16,632 | 9 |
| 2 | Union Grove Utility Board | 3,045 | 7 |
| 3 | City of Albertville, Municipal Ub of the | 29,367 | 7 |
| 4 | City of Guntersville, the Wwsb of the | 13,374 | 6 |
| 5 | North Marshall Utilities | 15,300 | 5 |
12 total water systems serve Marshall County.
All ZIP Codes in Marshall County
10 ZIP codes tracked in Marshall County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 35175 | Union Grove | 82 | B | 3 (1 health) | $183K |
| 2 | 35747 | Grant | 82 | B | 2 | $219K |
| 3 | 35957 | Boaz | 81 | B | 1 | $143K |
| 4 | 35950 | Albertville | 80 | B | 3 | $150K |
| 5 | 35964 | Douglas | 79 | B | 2 | — |
| 6 | 35016 | Arab | 78 | B | 1 | $193K |
| 7 | 35976 | Guntersville | 77 | B | 3 | $255K |
| 8 | 35755 | Langston | 53 | D | 0 | $420K |
| 9 | 35975 | Groveoak | 53 | D | 0 | $182K |
| 10 | 35980 | Horton | 53 | D | 0 | $169K |
Recommended Buyer Guides for Marshall County
Designed to find the guide that fits the county, not the other way around — the system reads EPA detections, FEMA hazard layers, and CDC lead-exposure markers, then outputs the categories that resolve those specific risks for households here, with NSF-certified products surfaced when the matching contaminant appears in the local monitoring data.
- 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 Marshall County, Alabama
Overview
Marshall County in Alabama covers 10 ZIP codes with an average Home Safety Score of B (72/100).
7 of 10 ZIP codes have recorded EPA violations. 1 health-based violation have been documented.
← Back to Alabama 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.