Simpson County, Mississippi
7 ZIP codes · Avg score 80/100 · Grade B · Updated 2026-06-03
Compared to state averages, Simpson County scores well — its 7 ZIP codes sit above the baseline for tap water quality.
How Simpson County Compares
How Simpson County Compares
Simpson County scores 1 points below the Mississippi state average (81/100) and 12 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Simpson County, Mississippi
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 16 (asthma 10.2%, diabetes 16.6%)
Estimated additional annual cost per homeowner: $1,151, driven primarily by flood
Infrastructure: 0.336% avg pipe failure probability, 29% of ZIPs at high risk
57.6% of homes built before 1978 (lead paint era)
Violation History (2022–2025)
→ Stable trendEPA violation counts by year across Simpson County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 9 violations. Past 5 years: 21 total (21 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: $1,151
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
12,418 housing units in Simpson 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 Simpson County
Remediation costs are relatively manageable for most homeowners in Simpson 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 Simpson 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 Simpson County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Highway 28 Water Association | 2,500 | 13 |
| 2 | Smiths Crossing Water Assn | 4,480 | 10 |
| 3 | City of Magee | 3,526 | 10 |
| 4 | Okatoma Water Association #1 | 3,981 | 10 |
| 5 | Traxler Water Association | 855 | 10 |
24 total water systems serve Simpson County.
All ZIP Codes in Simpson County
7 ZIP codes tracked in Simpson County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 39082 | Harrisville | 93 | A | 1 | — |
| 2 | 39044 | Braxton | 91 | A | 2 | $142K |
| 3 | 39149 | Pinola | 89 | A | 3 | $92K |
| 4 | 39114 | Mendenhall | 83 | B | 2 | $116K |
| 5 | 39140 | Newhebron | 73 | B | 0 | $107K |
| 6 | 39062 | D Lo | 65 | C | 0 | $91K |
| 7 | 39111 | Magee | 63 | C | 8 | $119K |
Recommended Buyer Guides for Simpson County
Below: editorial picks, no sponsored placements.
- Best Lead Paint Test Kits — 57.6% 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
Deep Dive Reports
Detailed analysis for Simpson County, Mississippi
Overview
Simpson County in Mississippi covers 7 ZIP codes with an average Home Safety Score of B (80/100).
5 of 7 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← 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.