Great Neck, NY Water Safety: 91/100 (2026)
7 ZIP codes · 2 water systems · Updated 2026-06-03
Unlike many cities its size in NY, Great Neck keeps health-based violation rates low — systems here score at or above the state average for tap water safety, with no systemic concerns flagged in the current data set.
How Great Neck Compares
Data: EPA SDWIS Last verified: 2026-06-03
Water Quality Map: Great Neck, NY
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Score Distribution
How ZIP codes in Great Neck score across all safety grades.
What You Should Know About Great Neck Water
- Average lead level: 0.0016 mg/L.
- Estimated remediation: $1,800 per household.
- CDC health risk index: 10.69.
Who Supplies Your Water in Great Neck
With 2 utilities splitting service in Great Neck, NY, water accountability is distributed across 2 systems on the federal record.
Overview
We track water quality and home safety data for 7 ZIP codes in Great Neck, New York (population ~44,105), covering 2 community water systems serving approximately 74,400 people region-wide.
No EPA violations recorded across any ZIP codes in Great Neck — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Great Neck: A (91/100)
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
Great Neck water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0016 mg/L (EPA action level: 0.015 mg/L)
- 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): 7 ZIP codes
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 11020 | A | Manhasset Lakeville Water District | 43,000 |
| 11021 | A | Manhasset Lakeville Water District | 43,000 |
| 11022 | A | Manhasset Lakeville Water District | 43,000 |
| 11023 | A | Manhasset Lakeville Water District | 43,000 |
| 11024 | A | Water Authority of Great Neck North | 31,400 |
| 11026 | A | Manhasset Lakeville Water District | 43,000 |
| 11027 | A | Manhasset Lakeville Water District | 43,000 |
All ZIP Codes in Great Neck
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 Great Neck
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 Great Neck Homeowners
Given current Great Neck valuations, the remediation-to-property-value ratio is low — most homeowners are looking at a proportionally modest share that fits within routine financial planning.
Remediation costs in Great Neck are relatively low compared to home values. The $1,200–$2,560 estimated range is a small fraction of median property value. Home values are 219% above the New York average.
Lead Exposure Risk for Children in Great Neck
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 Great Neck 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.
Flood & Climate Risk in Great Neck
466 FEMA flood insurance claims are on file for Great Neck, and 57% of local ZIP codes fall within federally designated flood zones — enough to put flood exposure on the planning radar, though short of the concentrated-risk threshold where treatment-system vulnerability becomes a primary consideration.
Great Neck has a moderate flood history with 466 FEMA claims averaging $16,003 per payout. 57% 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.
Deep Dive Reports
Detailed analysis for Great Neck, NY