Hewlett, NY Water Safety: 55/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
Across Hewlett, EPA compliance data for NY sits at a moderate level — not alarming, but not uniformly clean across all service areas either.
How Hewlett Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Hewlett Water
- Homes built before 1986: 92% — older plumbing may contain lead solder.
- Estimated remediation: $3,100 per household.
- CDC health risk index: 10.69.
Who Supplies Your Water in Hewlett
Federal drinking water records identify 2 systems in Hewlett, 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 1 ZIP code in Hewlett, New York (population ~8,503), covering 2 community water systems serving approximately 244,700 people region-wide.
No EPA violations recorded across any ZIP codes in Hewlett — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Hewlett: C (55/100)
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
Hewlett water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Hewlett
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 11557 | C | Liberty Utilities New York - Lynbrook | 220,000 |
All ZIP Codes in Hewlett
- 11557 [C]
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 Hewlett
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
Housing & Infrastructure in Hewlett
With 92% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Hewlett's housing stock is predominantly older, with a median build year of 1956 that reflects decades of construction before federal plumbing standards were tightened. The 1986 ban on lead solder and the pre-1970 era of lead service lines are both relevant benchmarks here — a significant share of the residential inventory predates one or both of those cutoffs, creating an elevated baseline for plumbing-related lead risk that aggregate water quality data may not fully reflect at the household level.
Over half of homes in Hewlett were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Cost Context: What Remediation Means for Hewlett Homeowners
Placing remediation in the context of Hewlett's property market, the equity share is low — most homeowners here are weighing a financial commitment that fits comfortably within routine property planning, far from the threshold where remediation becomes a material equity decision rather than a standard upkeep consideration.
Remediation costs in Hewlett are relatively low compared to home values. The $2,200–$4,800 estimated range is a small fraction of median property value. Home values are 96% above the New York average.
Lead Exposure Risk for Children in Hewlett
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.
Before the federal solder ban, lead solder was a routine plumbing material, and 92% of the Hewlett inventory was built in that earlier era — a share large enough to move household-level reads onto the standard list.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in Hewlett
Multiple flood events have been recorded for Hewlett through the NFIP — 369 claims in total, with 100% of ZIP codes in FEMA-designated zones — pointing to a flood exposure profile that merits inclusion in a water quality assessment without reaching high-severity planning territory.
Hewlett has a moderate flood history with 369 FEMA claims averaging $57,942 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>$3,100</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 Hewlett
- 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. With 92% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Hewlett, NY