Marshall County, Kentucky
4 ZIP codes · Avg score 85/100 · Grade A · Updated 2026-06-03
Throughout Marshall County, the 4 monitored ZIP codes show low violation rates and healthy safety scores — a pattern that puts the county well above the state baseline for drinking water quality.
How Marshall County Compares
How Marshall County Compares
Marshall County scores 24 points above the Kentucky state average (61/100) and 17 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
Key Risk Factors
Estimated additional annual cost per homeowner: $1,113, driven primarily by flood
Infrastructure: 0.335% avg pipe failure probability
54.5% of homes built before 1978 (lead paint era)
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: $1,113
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
16,121 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.
Water Systems with Most Violations
Top 5 systems in Marshall County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Benton Water & Sewer | 7,981 | 2 |
| 2 | Jonathan Creek Water District | 7,182 | 2 |
| 3 | Dexter Almo Heights Water District | 2,275 | 2 |
| 4 | Hardin Water Department | 1,606 | 2 |
| 5 | North Marshall Water District #1 | 16,276 | 1 |
8 total water systems serve Marshall County.
All ZIP Codes in Marshall County
4 ZIP codes tracked in Marshall County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 42025 | Benton | 90 | A | 1 | $173K |
| 2 | 42029 | Calvert City | 90 | A | 0 | $145K |
| 3 | 42048 | Hardin | 87 | A | 1 | $119K |
| 4 | 42044 | Gilbertsville | 73 | B | 0 | $237K |
Recommended Buyer Guides for Marshall County
Methodologically, the recommendation order reflects severity in the federal record: contaminants flagged in EPA detection records for this county outrank generic water concerns, FEMA-confirmed hazard ratings shift emergency-related categories upward, and CDC lead-exposure markers govern when lead-test kits and certified filters appear at the top of the list.
- Best Lead Paint Test Kits — 54.5% of homes built before 1978
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Overview
Marshall County in Kentucky covers 4 ZIP codes with an average Home Safety Score of A (85/100).
2 of 4 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← Back to Kentucky 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.