Marlboro County, South Carolina
7 ZIP codes · Avg score 81/100 · Grade B · Updated 2026-06-04
Based on current EPA data, Marlboro County's 7 ZIP codes maintain an above-average drinking water safety record.
How Marlboro County Compares
How Marlboro County Compares
Marlboro County scores 3 points above the South Carolina state average (78/100) and 13 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Marlboro County, South Carolina
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 16.4 (asthma 10.5%, diabetes 19.2%)
Estimated additional annual cost per homeowner: $3,840, driven primarily by sea_level
Infrastructure: 0.334% avg pipe failure probability, 14% of ZIPs at high risk
59.3% 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: $3,840
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
12,320 housing units in Marlboro 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 Marlboro 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.
Health Outcomes vs National Average
CDC PLACES data for Marlboro County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 4 systems in Marlboro County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Bennettsville City of (sc3410001) | 9,070 | 0 |
| 2 | Wallace Water Company (sc3420002) | 3,552 | 0 |
| 3 | CLIO TOWN OF (SC3410002) | 788 | 0 |
| 4 | Marlboro Water Company (sc3420001) | 5,360 | 0 |
All ZIP Codes in Marlboro County
7 ZIP codes tracked in Marlboro County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 29525 | Clio | 99 | A | 0 | $53K |
| 2 | 29596 | Wallace | 95 | A | 0 | $58K |
| 3 | 29512 | Bennettsville | 90 | A | 0 | $79K |
| 4 | 29516 | Blenheim | 73 | B | 0 | — |
| 5 | 29567 | Little Rock | 73 | B | 0 | $55K |
| 6 | 29570 | Mc Coll | 73 | B | 0 | $55K |
| 7 | 29594 | Tatum | 66 | C | 0 | $102K |
Recommended Buyer Guides for Marlboro 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 Lead Paint Test Kits — 59.3% of homes built before 1978
Deep Dive Reports
Detailed analysis for Marlboro County, South Carolina
Overview
Marlboro County in South Carolina covers 7 ZIP codes with an average Home Safety Score of B (81/100).
No EPA violations recorded across any tracked ZIP codes in Marlboro County.
← Back to South Carolina 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.