Charleston County, South Carolina
39 ZIP codes · Avg score 83/100 · Grade B · Updated
ZipCheckup grade for Charleston County: B.
This ZIP looks solid, with a few items worth a quick check.
Within Charleston County's 39 tracked ZIP codes, safety indicators remain above the national average with few health-based violations on record.
How Charleston County Compares
How Charleston County Compares
Charleston County scores 3 points above the South Carolina state average (80/100) and 10 points above the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:
ZIP Code Risk Map
Water Quality Map: Charleston 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: 11.4 (asthma 8.8%, diabetes 11.4%)
Estimated additional annual cost per homeowner: $3,511, driven primarily by flood
51% of homes built before 1978 (lead paint era)
Violation History (2024–2025)
→ Stable trendEPA violation counts by year across Charleston County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 6 violations. Past 5 years: 8 total (8 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
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $3,511
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
202,310 housing units in Charleston 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 Charleston County
Remediation costs are relatively manageable for most homeowners in Charleston 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 Charleston County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Charleston County
8 community water systems serving Charleston County.
- B
- B
- B
- B
- B
- B
Show all 8 water systems
- B
- B
16 total water systems serve Charleston County.
Systems with the most violations in Charleston County
5 water systems with recorded EPA violations.
- B
- B
- B
- B
- A
All ZIP Codes in Charleston County
39 ZIP codes tracked in Charleston County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 29812 | Barnwell | 99 | A | 2 | $105K |
| 2 | 29401 | Charleston | 83 | B | 0 | $1166K |
| 3 | 29403 | Charleston | 83 | B | 0 | $624K |
| 4 | 29404 | Charleston Afb | 83 | B | 0 | — |
| 5 | 29405 | North Charleston | 83 | B | 0 | $266K |
| 6 | 29406 | Charleston | 83 | B | 0 | $210K |
| 7 | 29407 | Charleston | 83 | B | 0 | $407K |
| 8 | 29409 | Charleston | 83 | B | 0 | — |
| 9 | 29412 | Charleston | 83 | B | 0 | $458K |
| 10 | 29414 | Charleston | 83 | B | 0 | $381K |
| 11 | 29418 | North Charleston | 83 | B | 2 | $235K |
| 12 | 29424 | Charleston | 83 | B | 0 | — |
| 13 | 29425 | Charleston | 83 | B | 0 | — |
| 14 | 29426 | Adams Run | 83 | B | 0 | $211K |
| 15 | 29429 | Awendaw | 83 | B | 0 | $479K |
| 16 | 29436 | Cross | 83 | B | 0 | $107K |
| 17 | 29439 | Folly Beach | 83 | B | 0 | $1004K |
| 18 | 29449 | Hollywood | 83 | B | 0 | $405K |
| 19 | 29451 | Isle Of Palms | 83 | B | 2 | $1198K |
| 20 | 29464 | Mount Pleasant | 83 | B | 0 | $672K |
| 21 | 29469 | Pinopolis | 83 | B | 0 | $352K |
| 22 | 29470 | Ravenel | 83 | B | 0 | $244K |
| 23 | 29482 | Sullivans Island | 83 | B | 0 | $2000K |
| 24 | 29455 | Johns Island | 82 | B | 3 | $500K |
| 25 | 29466 | Mount Pleasant | 77 | B | 9 (6 health) | $659K |
| 26 | 29222 | Columbia | — | — | — | |
| 27 | 29402 | Charleston | — | — | — | |
| 28 | 29413 | Charleston | — | — | — | |
| 29 | 29415 | North Charleston | — | — | — | |
| 30 | 29416 | Charleston | — | — | — | |
| 31 | 29417 | Charleston | — | — | — | |
| 32 | 29419 | North Charleston | — | — | — | |
| 33 | 29422 | Charleston | — | — | — | |
| 34 | 29423 | Charleston | — | — | — | |
| 35 | 29457 | Johns Island | — | — | — | |
| 36 | 29458 | Mc Clellanville | — | — | $347K | |
| 37 | 29465 | Mount Pleasant | — | — | — | |
| 38 | 29487 | Wadmalaw Island | — | — | $442K | |
| 39 | 29493 | Williams | — | — | $90K |
Recommended Buyer Guides for Charleston County
While many sites publish identical guide lists across every county they cover, the selection here changes by location - driven by the EPA, NSF, FEMA, and CDC datasets that describe the actual conditions documented for this jurisdiction in the federal record.
- Best Lead Paint Test Kits — 51% of homes built before 1978
- 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 Charleston County, South Carolina
Overview
Charleston County in South Carolina covers 39 tracked ZIP records with an average Home Safety Score of B (83/100) across 25 scored records.
5 of 25 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 6 health-based violations appear in the available health breakdown.
← Back to South Carolina Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.