CITY REPORT NY

Stony Brook, NY - Home Safety 83/100

2 ZIP codes · 1 water system · Updated

ZipCheckup grade for Stony Brook: B.

This ZIP has a few items worth a quick check.

Stony Brook, NY carries a grade in ZipCheckup's upper tier; any health-based violations on record should be checked per water system.

How Stony Brook Compares

Stony Brook83/100
New York avg84/100
National avg73/100

Data: EPA SDWIS

2
ZIP Codes
1
Water Systems
0
ZIPs Linked to Systems with Violations
B · 83
Avg Safety Score
Zone 3
County Radon Potential (Low)
$590K
Median Home Value
$600
Est. Remediation (0.1% of home value)

Key Facts for Stony Brook Residents

  • Average of reported 90th-percentile lead results: 0.0013 mg/L.
  • Estimated remediation: $600 per household.
  • Health risk index (ZipCheckup composite of CDC data): 11.13.

Stony Brook's Water Providers

Which water system serves a particular address in Stony Brook, NY? The water bill or the utility can confirm it; the list here shows one system, and federal data link 1 in total.

Overview

We track home safety data for 2 ZIP codes in Stony Brook, New York (population ~21,453), covering 1 community water system serving approximately 1,100,000 people region-wide. The EPA snapshots used for this build directly map water systems to 2 of 2 ZIP codes.

The available EPA record reports 0 violations for 2 ZIP codes with a reported violation count.

Home Safety Score

Average Home Safety Score for Stony Brook: B (83/100)

Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:

Factor What It Measures
Water Quality EPA violations and compliance history
PFAS MCL Screen UCMR 5 testing against the covered federal MCLs
Radon Risk EPA radon zone classification
Annual AQI EPA AirData county-year median with at least 90 observed days

Water Sources

Stony Brook water systems draw from: Groundwater.

Lead & Copper

  • Average of reported 90th-percentile lead results: 0.0013 mg/L (EPA action level: 0.015 mg/L)
  • 0 of 2 ZIP codes with known status exceed the EPA lead action level

Radon Risk

2 of 2 ZIP records with known zones are in EPA Radon Zone 3.

The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.

Areas with No Violations

ZIP Code Safety Score System Population
11790 B Suffolk County Water Authority 1,100,000
11794 — Suffolk County Water Authority 1,100,000

All ZIP Codes in Stony Brook

Data Sources

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

Stony Brook Community Health Snapshot

10.2%
Asthma (US: 9.8%)
10%
Diabetes (US: 10.4%)
14.4%
Poor Mental Health (US: 14.8%)

Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.

Compared to National Average

Asthma 10.2% ↑
Diabetes 10% ↓
Mental Health 14.4% ↓

Vertical line = national average. ■ Above national · ■ Below national

How Remediation Costs Compare in Stony Brook

Measured against the median home value, the estimated cost of fixing the issues flagged for Stony Brook lands in the lowest of the three tiers this page uses.

Median Home Value
$590,000
Est. Remediation
$600
Remediation as % of home value 0.1%

Estimated remediation costs in Stony Brook can be compared with local home values. The $400–$800 estimated range can be set against the median property value; actual costs vary by home. Home values are 63% above the New York average.

Stony Brook: Lead Risk & Vulnerable Populations

0.0013
mg/L average of reported water-system 90th-percentile lead results (the 0.015 action level applies to each system's result, not to this average)

Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.

Available area-level lead records for Stony Brook do not determine the lead level at an individual tap. 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.

Stony Brook: NFIP Claim Records and Water-Quality Context

49
Total FEMA Flood Claims
$30,263
Avg Reported Sum With Payment Data
0%
A/V Share of Claim-Record ZIPs

Historical NFIP data for Stony Brook contains 49 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $30,263. Among ZIP codes with claim records, 0% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.

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. The $600 remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.

Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.

Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.

Deep Dive Reports

Detailed analysis for Stony Brook, NY

Frequently Asked Questions

What does the Home Safety Score mean for Stony Brook, NY?
Stony Brook has an average Home Safety Score of 83/100 (Grade B) under ZipCheckup model 4.0.0, an area-level model that draws on EPA water compliance records, PFAS screening, EPA radon zones, and annual EPA air quality data; see the methodology page for how inputs and coverage are handled. The available EPA record reports no violations for ZIP codes with reported counts. Check individual ZIP code reports for component details.
Does Stony Brook water have lead?
The average of the reported 90th-percentile lead results across the ZIP codes of Stony Brook is 0.0013 mg/L. The EPA action level of 0.015 mg/L applies to each water system's own 90th percentile, not to this average. EPA's health goal for lead is zero. Lead levels can vary by home - testing is recommended especially in older properties.
How does Stony Brook compare to New York average?
Stony Brook has an average Home Safety Score of 83/100, which is below the New York state average of 84/100 for the same model series.
How many water systems serve Stony Brook?
Our records map 1 water system to 2 ZIP codes in Stony Brook. The related population figure in our data is approximately 21,453 people; it is not a count of people served citywide.
How much does it cost to fix water issues in Stony Brook?
Estimated remediation cost per household in Stony Brook: $600; modeled range $400 to $800. Estimated costs may include filtration, pipe replacement, radon mitigation, or flood protection where applicable.
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How to cite this page

APA ZipCheckup. (2026). Stony Brook, NY - Home Safety 83/100. https://zipcheckup.com/cities/ny/stony-brook/
BibTeX 
@misc{zipcheckup-cities-ny-stony-brook,
  author = {{ZipCheckup}},
  title  = {{Stony Brook, NY - Home Safety 83/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/cities/ny/stony-brook/}
}

Page version: October 2026.

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