Sayville, NY Water Safety: 50/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
Federal monitoring data for Sayville puts the city in NY's lower safety tier — exceedances show up in multiple utility districts, several systems have met thresholds requiring public notification under the Safe Drinking Water Act, and the compliance deficit has persisted across more than one consecutive reporting cycle, with no clear reversal visible in the most recent data available.
How Sayville Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Sayville Water
- Homes built before 1986: 84% — older plumbing may contain lead solder.
- Estimated remediation: $2,400 per household.
- CDC health risk index: 11.13.
Who Supplies Your Water in Sayville
Federal drinking water records identify 2 systems in Sayville, 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 Sayville, New York (population ~14,537), covering 2 community water systems serving approximately 1,104,500 people region-wide.
No EPA violations recorded across any ZIP codes in Sayville — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Sayville: 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
Sayville water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Sayville
- 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 |
|---|---|---|---|
| 11782 | D | SUFFOLK COUNTY WATER AUTHORITY | 1,100,000 |
All ZIP Codes in Sayville
- 11782 [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.
Health Outcomes in Sayville
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 Sayville
With 84% 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
Viewed through the lens of construction era, Sayville is predominantly an older city — a median build year of 1965 puts most of the residential inventory in the range where pre-1986 plumbing materials were the standard.
Over half of homes in Sayville 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 Sayville Homeowners
Within the Sayville market, estimated remediation claims a small portion of typical property equity — the financial burden is proportionally low.
Remediation costs in Sayville are relatively low compared to home values. The $1,600–$3,300 estimated range is a small fraction of median property value. Home values are 70% above the New York average.
Lead Exposure Risk for Children in Sayville
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.
Practically, the structural drivers in Sayville — 84% pre-rule stock and citywide monitoring at or beyond the regulatory benchmark — make an in-home draw the practical way to translate aggregate averages into the specific conditions at one address.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in Sayville
Decades of documented flood activity appear in Sayville's NFIP record — 1009 insurance claims filed and 100% of ZIP codes carrying FEMA flood designations. The scale of that record puts water infrastructure vulnerability from flooding into the concrete-risk category.
Sayville has a significant flood history with 1,009 FEMA flood insurance claims on record, averaging $34,134 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>$2,400</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 Sayville
- 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 84% 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 Sayville, NY