Uniondale, NY Water Safety: 68/100 (2026)
3 ZIP codes · 4 water systems · Updated 2026-06-03
Compared to top-scoring cities in NY, Uniondale lands in the middle tier — some water systems meet standards cleanly, others carry documented violations, and performance can vary significantly across service areas.
How Uniondale Compares
Data: EPA SDWIS Last verified: 2026-06-03
Uniondale Water: The Quick Version
- Estimated remediation: $1,800 per household.
- CDC health risk index: 10.69.
Water Systems Serving Uniondale
Water service in Uniondale, NY is split across 3 utilities out of 4 tracked federally, each operating its own infrastructure and compliance record.
Overview
We track water quality and home safety data for 3 ZIP codes in Uniondale, New York (population ~28,344), covering 4 community water systems serving approximately 344,000 people region-wide.
No EPA violations recorded across any ZIP codes in Uniondale — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Uniondale: C (68/100)
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
Uniondale water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Uniondale
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 3 ZIP codes
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 11553 | C | LIBERTY UTILITIES NEW YORK - MERRICK | 135,000 |
| 11555 | C | LIBERTY UTILITIES NEW YORK - MERRICK | 135,000 |
| 11556 | B | Town of Hempstead Water Department | 110,000 |
All ZIP Codes in Uniondale
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.
CDC Health Data for Uniondale
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
Uniondale: Remediation Cost in Perspective
How much of a Uniondale 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 Uniondale are relatively low compared to home values. The $1,200–$2,550 estimated range is a small fraction of median property value. Home values are 34% above the New York average.
Climate-Related Water Risk for Uniondale
Uniondale's flood exposure sits in the moderate range: 19 NFIP claims on record and 67% of ZIP codes within FEMA-designated flood zones. Residents with private wells or older infrastructure have reasonable grounds to factor flood timing into their water quality awareness.
Uniondale has a moderate flood history with 19 FEMA claims averaging $3,649 per payout. 67% 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 Uniondale
- 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 Uniondale, NY