Lexington County, South Carolina
18 ZIP codes · Avg score 86/100 · Grade A · Updated 2026-06-04
In current tracking cycles, Lexington County — spanning 18 ZIP codes — records above-average water quality outcomes; the county's compliance history over recent years shows few departures from federal standards.
How Lexington County Compares
How Lexington County Compares
Lexington County scores 8 points above the South Carolina state average (78/100) and 18 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Lexington 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: 13 (asthma 9.3%, diabetes 12.6%)
Estimated additional annual cost per homeowner: $1,098, driven primarily by flood
Infrastructure: 0.294% avg pipe failure probability, 6% of ZIPs at high risk
46.7% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
→ Stable trendEPA violation counts by year across Lexington County water systems. Health-based shown in red, total in blue.
Peak year: 2021 with 5 violations. Past 5 years: 11 total (11 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: $1,098
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
144,408 housing units in Lexington 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 Lexington County
Remediation costs are relatively manageable for most homeowners in Lexington 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 Lexington 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 Lexington County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Wild Meadows S/d (sc3250097) | 878 | 11 |
| 2 | Gaston Rural Water District (sc3220002) | 7,550 | 10 |
| 3 | Swansea Town of (sc3210006) | 1,923 | 10 |
| 4 | COLUMBIA CITY OF (SC4010001) | 319,500 | 10 |
| 5 | Lieber Correctional Institute (1870050) | 1,646 | 10 |
38 total water systems serve Lexington County.
All ZIP Codes in Lexington County
18 ZIP codes tracked in Lexington County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 29071 | Lexington | 99 | A | 1 | — |
| 2 | 29123 | Pelion | 99 | A | 0 | $145K |
| 3 | 29171 | West Columbia | 99 | A | 0 | — |
| 4 | 29054 | Gilbert | 95 | A | 0 | $278K |
| 5 | 29172 | West Columbia | 95 | A | 0 | $168K |
| 6 | 29053 | Gaston | 92 | A | 8 | $117K |
| 7 | 29006 | Batesburg | 91 | A | 2 | $137K |
| 8 | 29072 | Lexington | 90 | A | 1 | $304K |
| 9 | 29073 | Lexington | 90 | A | 1 | $198K |
| 10 | 29169 | West Columbia | 90 | A | 0 | $190K |
| 11 | 29170 | West Columbia | 90 | A | 0 | $191K |
| 12 | 29033 | Cayce | 85 | A | 0 | $156K |
| 13 | 29212 | Columbia | 80 | B | 5 (2 health) | $222K |
| 14 | 29210 | Columbia | 75 | B | 5 (2 health) | $183K |
| 15 | 29070 | Leesville | 73 | B | 0 | $188K |
| 16 | 29160 | Swansea | 73 | B | 2 | $122K |
| 17 | 29075 | Little Mountain | 66 | C | 0 | $234K |
| 18 | 29177 | White Rock | 66 | C | 0 | — |
Recommended Buyer Guides for Lexington County
Independent picks. EPA-grounded. Matched here.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- 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 Lexington County, South Carolina
Overview
Lexington County in South Carolina covers 18 ZIP codes with an average Home Safety Score of A (86/100).
8 of 18 ZIP codes have recorded EPA violations. 4 health-based violations have been documented.
← 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.