Greenville, SC: High Radon Risk — 60/100 (2026)
17 ZIP codes · 6 water systems · Updated 2026-06-03
Recent monitoring in Greenville shows middle-tier safety for SC — some systems are clean; others have logged EPA violations.
How Greenville Compares
Data: EPA SDWIS Last verified: 2026-06-03
Water Quality Map: Greenville, SC
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Score Distribution
Safety grade breakdown for Greenville's 17 ZIP codes.
Key Facts for Greenville Residents
- Estimated remediation: $2,300 per household.
- CDC health risk index: 12.52 — above typical levels.
Greenville's Water Providers
Across Greenville, SC, residential water comes from 3 primary utilities rather than a single consolidated provider. Each system operates independently — managing its own distribution infrastructure, rate schedules, and EPA compliance filings. Federal records track 6 water systems in the area, with these top providers accounting for the majority of residential connections.
Overview
We track water quality and home safety data for 17 ZIP codes in Greenville, South Carolina (population ~231,120), covering 6 community water systems serving approximately 597,245 people region-wide.
No EPA violations recorded across any ZIP codes in Greenville — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Greenville: C (60/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Greenville water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Greenville
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
- Zone 1 (High): 15 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 2 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 29601 | C | Greenville Water (2310001) | 396,265 |
| 29602 | A | Greenville Water (2310001) | 396,265 |
| 29603 | C | Greenville Water (2310001) | 396,265 |
| 29604 | A | Greenville Water (2310001) | 396,265 |
| 29605 | C | Greenville Water (2310001) | 396,265 |
| 29606 | C | Greenville Water (2310001) | 396,265 |
| 29607 | D | Greenville Water (2310001) | 396,265 |
| 29608 | C | Greenville Water (2310001) | 396,265 |
| 29609 | C | Greenville Water (2310001) | 396,265 |
| 29610 | C | Greenville Water (2310001) | 396,265 |
All ZIP Codes in Greenville
- 29601 [C]
- 29602 [A]
- 29603 [C]
- 29604 [A]
- 29605 [C]
- 29606 [C]
- 29607 [D]
- 29608 [C]
- 29609 [C]
- 29610 [C]
- 29611 [C]
- 29612 [C]
- 29613 [C]
- 29614 [C]
- 29615 [D]
- 29616 [C]
- 29617 [D]
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Greenville Community Health Snapshot
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
How Remediation Costs Compare in Greenville
Across Greenville, the equity share taken up by estimated remediation is small — a favorable ratio for most property owners.
Remediation costs in Greenville are relatively low compared to home values. The $1,547–$3,159 estimated range is a small fraction of median property value. Home values are 47% above the South Carolina average.
Greenville: Flood History & Water Damage Risk
Greenville carries a substantial flood exposure profile — 586 claims filed over the program's long tracking window and 71% of ZIP codes within FEMA flood zones. For water quality, that exposure level means flooding has likely stressed local treatment and distribution infrastructure on multiple occasions, creating periodic windows of elevated contamination risk.
Greenville has a significant flood history with 586 FEMA flood insurance claims on record, averaging $21,949 per claim. With 71% of ZIP codes in FEMA-designated flood zones, flood risk is a major concern for homeowners and water quality.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$2,300</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
What You Can Do in Greenville
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.
Deep Dive Reports
Detailed analysis for Greenville, SC