Calloway County, Kentucky
6 ZIP codes · Avg score 75/100 · Grade B · Updated 2026-06-03
EPA monitoring reports for Calloway County cover 6 ZIP codes and tell a largely reassuring story — compliance rates are high and health-based violations are far below the national norm.
How Calloway County Compares
How Calloway County Compares
Calloway County scores 14 points above the Kentucky state average (61/100) and 7 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Calloway County, Kentucky
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Estimated additional annual cost per homeowner: $668, driven primarily by energy_code_gap
Infrastructure: 0.313% avg pipe failure probability, 17% of ZIPs at high risk
52.7% 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: $668
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
17,848 housing units in Calloway 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 Calloway County
Water safety remediation is a moderate expense relative to home values. Most homeowners can address issues through staged improvements over time.
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 Calloway County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Dexter Almo Heights Water District | 2,275 | 4 |
| 2 | Murray Water System | 26,302 | 4 |
| 3 | South 641 Water District | 1,160 | 4 |
| 4 | Stella Trailer Park | 74 | 4 |
| 5 | Benton Water & Sewer | 7,981 | 0 |
6 total water systems serve Calloway County.
All ZIP Codes in Calloway County
6 ZIP codes tracked in Calloway County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 42020 | Almo | 99 | A | 0 | $185K |
| 2 | 42049 | Hazel | 88 | A | 0 | $157K |
| 3 | 42036 | Dexter | 66 | C | 0 | $119K |
| 4 | 42054 | Kirksey | 66 | C | 0 | $154K |
| 5 | 42076 | New Concord | 66 | C | 0 | $155K |
| 6 | 42071 | Murray | 63 | C | 4 | $189K |
Recommended Buyer Guides for Calloway County
Where county records show a lead exceedance or pre-1978 housing concentration, lead-specific filters and test kits move toward the top of the list.
- Best Water Filters for Lead — Lead above EPA action level in 1 ZIP code
- Best Lead Paint Test Kits — 52.7% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Calloway County, Kentucky
Overview
Calloway County in Kentucky covers 6 ZIP codes with an average Home Safety Score of B (75/100).
1 of 6 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.