Hancock County, Mississippi
10 ZIP codes · Avg score 73/100 · Grade B · Updated 2026-06-03
Within Hancock County, all 10 tracked ZIP codes show above-average drinking water safety — violations are infrequent and typically minor.
How Hancock County Compares
How Hancock County Compares
Hancock County scores 8 points below the Mississippi state average (81/100) and 5 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Hancock County, Mississippi
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 9.2%, diabetes 14.3%)
Estimated additional annual cost per homeowner: $3,754, driven primarily by flood
Infrastructure: 0.266% avg pipe failure probability
30.7% 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: $3,754
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
23,719 housing units in Hancock 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 Hancock County
Remediation costs are relatively manageable for most homeowners in Hancock 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 Hancock 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 Hancock County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Hancock County Water & Sewer | 3,254 | 11 |
| 2 | Standard Dedeaux Water Association | 5,386 | 11 |
| 3 | Hancock County Water & Sewer- Bayside | 2,458 | 7 |
| 4 | Kiln Utility and Fire District of Hancoc | 7,051 | 7 |
| 5 | City of Hattiesburg | 43,449 | 6 |
23 total water systems serve Hancock County.
All ZIP Codes in Hancock County
10 ZIP codes tracked in Hancock County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 39529 | Stennis Space Center | 97 | A | 1 | — |
| 2 | 39573 | Perkinston | 84 | B | 4 | $201K |
| 3 | 39556 | Kiln | 79 | B | 7 (1 health) | $141K |
| 4 | 39525 | Diamondhead | 76 | B | 2 | $237K |
| 5 | 39572 | Pearlington | 74 | B | 4 | $108K |
| 6 | 39521 | Bay Saint Louis | 73 | B | 0 | — |
| 7 | 39404 | Hattiesburg | 72 | B | 6 | — |
| 8 | 39576 | Waveland | 67 | C | 4 (1 health) | $216K |
| 9 | 39558 | Lakeshore | 60 | C | 0 | — |
| 10 | 39520 | Bay Saint Louis | 50 | D | 0 | $203K |
Recommended Buyer Guides for Hancock County
Independent picks. EPA-grounded. Matched here.
- 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 Hancock County, Mississippi
Overview
Hancock County in Mississippi covers 10 ZIP codes with an average Home Safety Score of B (73/100).
7 of 10 ZIP codes have recorded EPA violations. 2 health-based violations have been documented.
← Back to Mississippi 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.