Horry County, South Carolina
19 ZIP codes · Avg score 79/100 · Grade B · Updated 2026-06-04
Horry County earns a high water safety grade — 19 ZIP codes tracked, virtually all compliant.
How Horry County Compares
How Horry County Compares
Horry County scores 1 points above the South Carolina state average (78/100) and 11 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Horry 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: 14.5 (asthma 9.2%, diabetes 14.9%)
Estimated additional annual cost per homeowner: $5,155, driven primarily by sea_level
Infrastructure: 0.268% avg pipe failure probability
32.7% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↓ Improving trendEPA violation counts by year across Horry County water systems. Health-based shown in red, total in blue.
Peak year: 2021 with 7 violations. Past 5 years: 14 total (14 health-based). Health-based violations are declining versus the prior 2-year window.
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: $5,155
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
201,023 housing units in Horry 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 Horry County
Remediation costs are relatively manageable for most homeowners in Horry 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 Horry 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 Horry County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Gsw&sa (sc2620004) | 247,550 | 19 |
| 2 | Conway City of (sc2610008) | 27,005 | 15 |
| 3 | Bucksport Water Company (sc2620003) | 17,123 | 12 |
| 4 | Conway Rural (sc2620001) | 12,740 | 12 |
| 5 | Gsw&sa-marion City of (sc3310001) | 9,104 | 12 |
21 total water systems serve Horry County.
All ZIP Codes in Horry County
19 ZIP codes tracked in Horry County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 29583 | Pamplico | 95 | A | 0 | $104K |
| 2 | 29528 | Conway | 91 | A | 4 (4 health) | — |
| 3 | 29228 | Columbia | 90 | A | 5 (2 health) | — |
| 4 | 29578 | Myrtle Beach | 90 | A | 1 | — |
| 5 | 29587 | Myrtle Beach | 90 | A | 1 | — |
| 6 | 29597 | North Myrtle Beach | 88 | A | 2 | — |
| 7 | 29569 | Loris | 83 | B | 1 | $190K |
| 8 | 29598 | North Myrtle Beach | 83 | B | 2 | — |
| 9 | 29572 | Myrtle Beach | 80 | B | 1 | $385K |
| 10 | 29575 | Myrtle Beach | 80 | B | 1 | $279K |
| 11 | 29579 | Myrtle Beach | 80 | B | 1 | $320K |
| 12 | 29588 | Myrtle Beach | 80 | B | 1 | $242K |
| 13 | 29527 | Conway | 76 | B | 4 (4 health) | $197K |
| 14 | 29577 | Myrtle Beach | 75 | B | 1 | $274K |
| 15 | 29545 | Green Sea | 73 | B | 0 | $108K |
| 16 | 29582 | North Myrtle Beach | 73 | B | 2 | $371K |
| 17 | 29526 | Conway | 71 | B | 4 (4 health) | $232K |
| 18 | 29566 | Little River | 60 | C | 0 | $276K |
| 19 | 29576 | Murrells Inlet | 50 | D | 0 | $316K |
Recommended Buyer Guides for Horry County
Editorial methodology pairs each documented risk in this county with the buyer category that addresses it, drawing on water-quality detections, housing-stock lead exposure, EPA Radon Zone designation, and FEMA flood and wildfire ratings. NSF-certified options surface where applicable, and products that match the specific contaminant take priority.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Horry County, South Carolina
Overview
Horry County in South Carolina covers 19 ZIP codes with an average Home Safety Score of B (79/100).
15 of 19 ZIP codes have recorded EPA violations. 14 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.