Rock Hill, SC: 10 Violations — 80/100 (2026)
5 ZIP codes · 8 water systems · Updated 2026-06-03
Rock Hill's tap water quality puts it in SC's upper tier — health-based violations are rare and the compliance record is consistently above average.
How Rock Hill Compares
Data: EPA SDWIS Last verified: 2026-06-03
Water Quality Map: Rock Hill, SC
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Score Distribution
Safety grade breakdown for Rock Hill's 5 ZIP codes.
Key Facts for Rock Hill Residents
- Your city's water systems recorded 10 violations in the past 5 years.
- Average lead level: 0.002 mg/L.
- Estimated remediation: $1,420 per household.
- CDC health risk index: 12.35 — above typical levels.
Rock Hill's Water Providers
Residential water in Rock Hill, SC is supplied by 3 separate utilities — not one centralized authority. Each of those providers operates under its own service territory boundary, maintains its own distribution infrastructure, and files compliance documentation with the EPA on its own timeline. Federal data counts 8 water systems in the area, with these providers collectively accounting for the dominant share of household connections.
Overview
We track water quality and home safety data for 5 ZIP codes in Rock Hill, South Carolina, covering 8 community water systems serving approximately 116,606 people.
5 of 5 ZIP codes (100%) have recorded EPA violations. All violations are monitoring/reporting type.
Home Safety Score
Average Home Safety Score for Rock Hill: B (80/100)
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
Rock Hill water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0020 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 5 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Surface Water Treatment Rule | Treatment Technique | 12 | 5 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 29730 | B | 2 | 0 | Rock Hill City of (sc4610002) |
| 29731 | B | 2 | 0 | Rock Hill City of (sc4610002) |
| 29732 | B | 2 | 0 | Rock Hill City of (sc4610002) |
| 29733 | B | 2 | 0 | Rock Hill City of (sc4610002) |
| 29734 | B | 2 | 0 | Rock Hill City of (sc4610002) |
All ZIP Codes in Rock Hill
- 29730 [B] — 2 violations
- 29731 [B] — 2 violations
- 29732 [B] — 2 violations
- 29733 [B] — 2 violations
- 29734 [B] — 2 violations
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.
Rock Hill 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
What's in Rock Hill's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Remediation Costs Compare in Rock Hill
How much of a Rock Hill home's value does documented remediation represent? A small fraction — the equity share here is in the low tier, and from a household financial perspective, most property owners are considering a commitment that fits comfortably within standard planning rather than a decision that rises to the level of a material budget event or significant equity consideration.
Remediation costs in Rock Hill are relatively low compared to home values. The $660–$2,360 estimated range is a small fraction of median property value. Home values are 46% above the South Carolina average.
Rock Hill: Lead Risk & Vulnerable Populations
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Lead risk in Rock Hill appears low overall, but individual homes may differ. Testing is the only way to confirm your water's lead content.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Rock Hill: Flood History & Water Damage Risk
A moderate NFIP record for Rock Hill — 51 insurance claims paired with 60% of ZIP codes in FEMA flood zones — points to a flood history where water-quality pathways have likely been periodically relevant.
Rock Hill has a moderate flood history with 51 FEMA claims averaging $9,920 per payout. 60% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
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>$1,420</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.
Deep Dive Reports
Detailed analysis for Rock Hill, SC