Melville, NY: High Radon Risk — 43/100 (2026)
2 ZIP codes · 4 water systems · Updated 2026-06-03
Water systems serving Melville record elevated violation rates against NY benchmarks — residents in affected areas may want to check their local system's current compliance status.
How Melville Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Melville Water
- Estimated remediation: $2,950 per household.
- CDC health risk index: 11.13.
Who Supplies Your Water in Melville
At present, 3 utilities serve the bulk of Melville, NY's residential water connections out of 4 systems active in the area, spread across independent providers with separate infrastructure and compliance obligations.
Overview
We track water quality and home safety data for 2 ZIP codes in Melville, New York (population ~19,826), covering 4 community water systems serving approximately 1,227,127 people region-wide.
No EPA violations recorded across any ZIP codes in Melville — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Melville: D (43/100)
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
Melville water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Melville
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
- Zone 1 (High): 2 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 0 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 |
|---|---|---|---|
| 11747 | D | SUFFOLK COUNTY WATER AUTHORITY | 1,100,000 |
| 11775 | D | WOODBURY CONS. W.D. | 10,845 |
All ZIP Codes in Melville
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.
Health Outcomes in Melville
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
Cost Context: What Remediation Means for Melville Homeowners
What does remediation cost in financial context for Melville homeowners? Proportionally very little — the equity share here is low, and addressing documented issues is a manageable planning question rather than a material financial burden.
Remediation costs in Melville are relatively low compared to home values. The $1,950–$4,050 estimated range is a small fraction of median property value. Home values are 106% above the New York average.
Flood & Climate Risk in Melville
The National Flood Insurance Program captures decades of claims at the local level, building a record of cumulative community flood exposure. For Melville, that record documents 79 claims and 100% of ZIP codes inside FEMA-designated flood zones. What makes those numbers relevant to water quality is the set of mechanisms flooding activates: heavy precipitation that floods treatment intake zones can introduce contaminants upstream of normal filtration; well casings in low-lying areas can be infiltrated by floodwaters carrying bacteria, sediment, and chemical residue; and distribution system pressure changes during flooding can create backflow conditions. These effects become more probable as flood frequency and magnitude increase — and the NFIP record indicates both are meaningful factors locally.
Melville has a moderate flood history with 79 FEMA claims averaging $20,417 per payout. 100% 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>$2,950</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 Melville
- 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.
- Review your water system's CCR. Your utility publishes an annual Consumer Confidence Report with detailed test results. Request it or find it online.
Deep Dive Reports
Detailed analysis for Melville, NY