Marengo County, Alabama
12 ZIP codes · Avg score 81/100 · Grade B · Updated 2026-06-03
Within Marengo County, all 12 tracked ZIP codes show above-average drinking water safety — violations are infrequent and typically minor.
How Marengo County Compares
How Marengo County Compares
Marengo County scores 8 points above the Alabama state average (73/100) and 13 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Marengo County, Alabama
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 16.9 (asthma 10.9%, diabetes 19.6%)
Estimated additional annual cost per homeowner: $1,200, driven primarily by sea_level
Infrastructure: 0.331% avg pipe failure probability, 20% of ZIPs at high risk
57% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
→ Stable trendEPA violation counts by year across Marengo County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 9 violations. Past 5 years: 15 total (15 health-based).
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: $1,200
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
9,722 housing units in Marengo 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 Marengo County
Remediation costs are relatively manageable for most homeowners in Marengo 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 Marengo 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 Marengo County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | SWEET WATER, THE WW & SB OF THE TOWN OF | 465 | 10 |
| 2 | THOMASTON WATER WORKS & GAS BOARD | 960 | 0 |
| 3 | Demopolis Water Works and Sewer Board | 10,530 | 0 |
| 4 | Faunsdale Water Works | 414 | 0 |
| 5 | City of Linden, the Ub of the | 5,103 | 0 |
7 total water systems serve Marengo County.
All ZIP Codes in Marengo County
12 ZIP codes tracked in Marengo County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 36738 | Faunsdale | 99 | A | 0 | $76K |
| 2 | 36748 | Linden | 99 | A | 0 | $92K |
| 3 | 36783 | Thomaston | 99 | A | 0 | $76K |
| 4 | 36763 | Myrtlewood | 95 | A | 0 | $54K |
| 5 | 36732 | Demopolis | 90 | A | 0 | $182K |
| 6 | 36782 | Sweet Water | 87 | A | 10 (5 health) | $61K |
| 7 | 36742 | Gallion | 73 | B | 0 | $131K |
| 8 | 36728 | Catherine | 66 | C | 0 | $45K |
| 9 | 36736 | Dixons Mills | 66 | C | 0 | $109K |
| 10 | 36745 | Jefferson | 66 | C | 0 | — |
| 11 | 36754 | Magnolia | 66 | C | 0 | — |
| 12 | 36764 | Nanafalia | 66 | C | 0 | — |
Recommended Buyer Guides for Marengo County
Editorial-only picks, screened against the EPA detections on file.
- Best Lead Paint Test Kits — 57% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Marengo County, Alabama
Overview
Marengo County in Alabama covers 12 ZIP codes with an average Home Safety Score of B (81/100).
1 of 12 ZIP codes have recorded EPA violations. 5 health-based violations 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.