Seaford, NY Water Safety: 50/100 (2026)
1 ZIP code · 4 water systems · Updated 2026-06-03
For households across Seaford, below-average water safety data and recurring compliance violations documented by NY EPA records make it worthwhile to verify the specific system serving your address — system-level detail is the most actionable reference point available.
How Seaford Compares
Data: EPA SDWIS Last verified: 2026-06-03
Seaford Water: The Quick Version
- Homes built before 1986: 92% — older plumbing may contain lead solder.
- Estimated remediation: $1,800 per household.
- CDC health risk index: 10.69.
Water Systems Serving Seaford
Multiple utilities divide Seaford, NY's water service — 3 leading providers among 4 on the federal register.
Overview
We track water quality and home safety data for 1 ZIP code in Seaford, New York (population ~21,588), covering 4 community water systems serving approximately 255,700 people region-wide.
No EPA violations recorded across any ZIP codes in Seaford — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Seaford: D (50/100)
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
Seaford water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Seaford
- 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 |
|---|---|---|---|
| 11783 | D | Liberty Utilities New York - Merrick | 135,000 |
All ZIP Codes in Seaford
- 11783 [D]
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 Seaford
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
How Old Is Seaford's Housing Stock?
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
Pre-1986 plumbing is not a rare legacy case in Seaford — it's the dominant profile. The median build year of 1953 indicates a housing stock where lead-soldered copper joints are a common structural feature of residences across the city.
Over half of homes in Seaford 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.
Seaford: Remediation Cost in Perspective
At current valuations, Seaford sits in the low remediation-share tier — the equity impact of fixing documented issues is proportionally minor.
Remediation costs in Seaford are relatively low compared to home values. The $1,200–$2,500 estimated range is a small fraction of median property value. Home values are 73% above the New York average.
Protecting Children from Lead in Seaford
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.
Despite citywide averages serving as the standard public reference point, those aggregates cannot resolve what is happening at one specific faucet — and where 92% of Seaford homes come from before the solder rule or where utility samples sit at or above the action mark, the gap between system data and faucet reality matters more than it does in lower-exposure communities. An in-home draw closes that gap, with certified filtration through retailer networks available where confirmed faucet results warrant additional measures.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Seaford
Seaford's flood profile — 2242 NFIP claims over the program's multi-decade period and 100% of ZIP codes within FEMA-designated flood zones — reflects a community where flooding has shaped the local risk landscape in sustained ways. That sustained exposure has specific consequences for water quality that don't apply to lower-exposure areas. Treatment facilities handling intake from flood-saturated watersheds face contaminant loads that can exceed normal filtration capacity. Private wells in FEMA-designated zones face surface infiltration risk during every significant event. Distribution systems in areas that flood repeatedly accumulate backflow stress over time. None of these represent constant threats to water quality, but they are activated by the kinds of events that the NFIP record shows have occurred here, repeatedly, over many years.
Seaford has a significant flood history with 2,242 FEMA flood insurance claims on record, averaging $38,851 per claim. With 100% of ZIP codes in FEMA-designated flood zones, flood risk is a major concern for homeowners and water quality.
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 Seaford
- 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.
- 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 Seaford, NY