Sumter County, South Carolina
8 ZIP codes · Avg score 85/100 · Grade A · Updated 2026-06-04
Spanning 8 ZIP codes, Sumter County posts strong drinking water compliance — most systems have never triggered a health-based notice.
How Sumter County Compares
How Sumter County Compares
Sumter County scores 7 points above the South Carolina state average (78/100) and 17 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Sumter 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: 14.7 (asthma 10.5%, diabetes 15.8%)
Estimated additional annual cost per homeowner: $3,035, driven primarily by sea_level
Infrastructure: 0.314% avg pipe failure probability, 14% of ZIPs at high risk
56.3% 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: $3,035
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
44,883 housing units in Sumter 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 Sumter County
Remediation costs are relatively manageable for most homeowners in Sumter 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 Sumter 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 Sumter County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | High Hills Rural Water Company Inc. (4320003) | 12,545 | 7 |
| 2 | Dalzell Water District (sc4320001) | 3,912 | 7 |
| 3 | SUMTER CITY OF (SC4310001) | 53,070 | 7 |
| 4 | Bgwc Oakland Plantation (sc4350006) | 1,180 | 7 |
| 5 | Oswego Rural Water Company (sc4320006) | 3,282 | 0 |
7 total water systems serve Sumter County.
All ZIP Codes in Sumter County
8 ZIP codes tracked in Sumter County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 29151 | Sumter | 99 | A | 0 | — |
| 2 | 29168 | Wedgefield | 99 | A | 0 | $66K |
| 3 | 29153 | Sumter | 90 | A | 0 | $120K |
| 4 | 29154 | Sumter | 85 | A | 0 | $183K |
| 5 | 29150 | Sumter | 80 | B | 0 | $157K |
| 6 | 29040 | Dalzell | 78 | B | 7 | $166K |
| 7 | 29062 | Horatio | 73 | B | 0 | — |
| 8 | 29128 | Rembert | 73 | B | 0 | $105K |
Recommended Buyer Guides for Sumter County
Federal and certification sources drive the ordering: EPA monitoring data, NSF certifications, FEMA flood maps, and CDC lead guidance — guides surface only when county data warrants them.
- Best Lead Paint Test Kits — 56.3% of homes built before 1978
Deep Dive Reports
Detailed analysis for Sumter County, South Carolina
Overview
Sumter County in South Carolina covers 8 ZIP codes with an average Home Safety Score of A (85/100).
1 of 8 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← 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.