Islandia, NY: High Radon Risk — 57/100 (2026)
2 ZIP codes · 2 water systems · Updated 2026-06-03
Recent monitoring in Islandia shows middle-tier safety for NY — some systems are clean; others have logged EPA violations.
How Islandia Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Islandia Water
- Estimated remediation: $1,800 per household.
- CDC health risk index: 11.13.
Who Supplies Your Water in Islandia
Federal drinking water records identify 2 systems in Islandia, NY. The leading 2 providers serve the largest share of residential connections, each operating as a separate entity with its own rate authority, infrastructure management, and EPA compliance obligations — so service conditions are not uniform city-wide.
Overview
We track water quality and home safety data for 2 ZIP codes in Islandia, New York (population ~3,581), covering 2 community water systems serving approximately 1,110,845 people region-wide.
No EPA violations recorded across any ZIP codes in Islandia — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Islandia: C (57/100)
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
Islandia water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Islandia
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
- Zone 1 (High): 1 ZIP code
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 1 ZIP code
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 11749 | B | SUFFOLK COUNTY WATER AUTHORITY | 1,100,000 |
| 11760 | D | WOODBURY CONS. W.D. | 10,845 |
All ZIP Codes in Islandia
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 Islandia
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 Islandia Homeowners
Setting Islandia remediation figures against its property market, the resulting ratio sits comfortably in the low tier — a classification that reflects the kind of household financial position where most homeowners can identify documented issues, schedule the work, and absorb the cost without it registering as a significant budget disruption.
Remediation costs in Islandia are relatively low compared to home values. The $1,200–$2,400 estimated range is a small fraction of median property value. Home values are 25% above the New York average.
Flood & Climate Risk in Islandia
Flood exposure in Islandia is meaningful by NFIP measures — 2 claims on record and 50% of ZIP codes carrying FEMA flood zone designations. That level of activity makes flood history a relevant factor when evaluating local water quality over time.
Islandia has a moderate flood history with 2 FEMA claims. 50% 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>$1,800</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 Islandia
- 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 Islandia, NY