COUNTY REPORT NY

Suffolk County, New York

117 ZIP codes · Avg score 84/100 · Grade B · Updated

ZipCheckup grade for Suffolk County: B.

This ZIP looks solid, with a few items worth a quick check.

Spanning 117 ZIP codes, Suffolk County posts strong drinking water compliance - most systems have never triggered a health-based notice.

How Suffolk County Compares

Suffolk County84/100
New York avg84/100
National avg73/100

How Suffolk County Compares

B
County Grade
84/100
Avg Safety Score
117
ZIP Codes
21
Water Systems

Suffolk County scores 0 points above the New York state average (84/100) and 11 points above the national average (73/100).

Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:

B
County Grade
84
Avg Safety Score
117
ZIP Codes
New York
Best ZIP: 10005 (100/100)
Riverhead
Lowest ZIP: 11901 (72/100)
$620K
Median Home Value
$2,207
Avg Remediation (36% of home value)

ZIP Code Risk Map

Water Quality Map: Suffolk County, New York

Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.

A B C D F

Key Risk Factors

Health risk index: 11.1 (asthma 10.2%, diabetes 10%)

Estimated additional annual cost per homeowner: $4,216, driven primarily by flood

72.1% of homes built before 1978 (lead paint era)

Violation History (2022–2025)

→ Stable trend

EPA violation counts by year across Suffolk County water systems. Health-based shown in red, total in blue.

2022
2 (2 health)
2023
14 (14 health)
2024
13 (13 health)
2025
4 (4 health)

Peak year: 2023 with 14 violations. Past 5 years: 33 total (33 health-based).

Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.

County Health Indicators vs National Average

Asthma 10.2% (national: 8.9%)
Diabetes 10% (national: 10.5%)
Obesity 29.7% (national: 32.4%)

Black markers indicate national averages. Source: CDC PLACES, Census ACS.

Infrastructure Overview

1970
Median Build Year
72.1%
Pre-1978 Housing
54/100
Infrastructure Stress Indicator
93%
ZIPs with High Infrastructure Stress
High
Lead Pipe Risk

Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.

Compound Risk Breakdown

Estimated additional annual cost per homeowner: $4,216

Flood $1,750/yr
Sea Level Rise $1,496/yr
Energy Code Gap $506/yr

Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).

Housing Age Distribution

663,699 housing units in Suffolk County

Pre-1940 16%
1940–1959 21%
1960–1979 35%
1980–1999 18%
2000+ 11%

Source: U.S. Census Bureau ACS B25034 (Year Structure Built).

Water Safety Affordability

How much it costs to fix water issues relative to home values in Suffolk County

$620K
Median Home Value
$2,207
Est. Remediation Cost
0.4%
of Home Value
Remediation as % of home value low burden

Remediation costs are relatively manageable for most homeowners in Suffolk County, representing a small fraction of property value.

Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.

Health Outcomes vs National Average

CDC PLACES data for Suffolk County residents

Asthma 10.2% (US avg: 8.9%)
Diabetes 10% (US avg: 11%)
Obesity 29.7% (US avg: 32.4%)

Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.

Water systems serving Suffolk County

8 community water systems serving Suffolk County.

Show all 8 water systems

21 total water systems serve Suffolk County.

Systems with the most violations in Suffolk County

5 water systems with recorded EPA violations.

All ZIP Codes in Suffolk County

117 ZIP codes tracked in Suffolk County.

# ZIP Code City Safety Score Grade Violations Home Value
1 10005 New York 100 A 0 $1387K
2 10025 New York 100 A 0 $1125K
3 10278 New York 100 A 0 —
4 11233 Brooklyn 100 A 0 $1013K
5 11747 Melville 100 A 29 $748K
6 11946 Hampton Bays 100 A 1 $691K
7 11740 Greenlawn 99 A 47 $687K
8 11701 Amityville 83 B 0 $489K
9 11702 Babylon 83 B 1 $599K
10 11703 North Babylon 83 B 0 $470K
11 11704 West Babylon 83 B 0 $485K
12 11705 Bayport 83 B 0 $618K
13 11706 Bay Shore 83 B 0 $464K
14 11713 Bellport 83 B 0 $475K
15 11717 Brentwood 83 B 0 —
16 11719 Brookhaven 83 B 0 $565K
17 11720 Centereach 83 B 0 $472K
18 11722 Central Islip 83 B 0 $407K
19 11724 Cold Spring Harbor 83 B 28 $1572K
20 11726 Copiague 83 B 0 $451K
21 11727 Coram 83 B 0 $410K
22 11729 Deer Park 83 B 1 $496K
23 11730 East Islip 83 B 0 $578K
24 11733 East Setauket 83 B 0 $653K
25 11738 Farmingville 83 B 0 $455K
26 11741 Holbrook 83 B 0 $504K
27 11742 Holtsville 83 B 0 $476K
28 11749 Islandia 83 B 0 $452K
29 11751 Islip 83 B 0 $502K
30 11752 Islip Terrace 83 B 0 $482K
31 11754 Kings Park 83 B 0 $595K
32 11755 Lake Grove 83 B 0 $559K
33 11757 Lindenhurst 83 B 1 $480K
34 11763 Medford 83 B 0 $435K
35 11764 Miller Place 83 B 0 $589K
36 11766 Mount Sinai 83 B 0 $633K
37 11767 Nesconset 83 B 0 $616K
38 11769 Oakdale 83 B 0 $586K
39 11770 Ocean Beach 83 B 0 $731K
40 11772 Patchogue 83 B 0 $451K
41 11776 Port Jefferson Station 83 B 0 $463K
42 11777 Port Jefferson 83 B 0 $656K
43 11778 Rocky Point 83 B 0 $411K
44 11779 Ronkonkoma 83 B 0 $465K
45 11780 Saint James 83 B 0 $703K
46 11782 Sayville 83 B 0 $614K
47 11784 Selden 83 B 0 $436K
48 11786 Shoreham 83 B 0 $540K
49 11787 Smithtown 83 B 0 $642K
50 11788 Hauppauge 83 B 0 $636K
51 11790 Stony Brook 83 B 0 $590K
52 11795 West Islip 83 B 0 $599K
53 11798 Wyandanch 83 B 0 —
54 11934 Center Moriches 83 B 0 $557K
55 11935 Cutchogue 83 B 0 $886K
56 11939 East Marion 83 B 0 $831K
57 11941 Eastport 83 B 0 $636K
58 11942 East Quogue 83 B 1 $801K
59 11950 Mastic 83 B 0 $373K
60 11952 Mattituck 83 B 0 $715K
61 11953 Middle Island 83 B 0 $358K
62 11954 Montauk 83 B 0 $1186K
63 11957 Orient 83 B 0 $924K
64 11958 Peconic 83 B 0 $831K
65 11961 Ridge 83 B 0 $403K
66 11963 Sag Harbor 83 B 0 $1117K
67 11964 Shelter Island 83 B 0 $999K
68 11965 Shelter Island Heights 83 B 0 $1092K
69 11967 Shirley 83 B 0 $386K
70 11968 Southampton 83 B 1 $1171K
71 11972 Speonk 83 B 0 $852K
72 11976 Water Mill 83 B 0 $2000K
73 11978 Westhampton Beach 83 B 0 $1045K
74 11980 Yaphank 83 B 0 $410K
75 11721 Centerport 82 B 19 $705K
76 11725 Commack 82 B 19 $643K
77 11731 East Northport 82 B 20 $622K
78 11743 Huntington 82 B 48 $748K
79 11746 Huntington Station 82 B 48 $665K
80 11768 Northport 82 B 19 $780K
81 11792 Wading River 82 B 2 (1 health) $558K
82 11931 Aquebogue 82 B 2 (1 health) —
83 11933 Calverton 82 B 3 (1 health) $430K
84 11944 Greenport 82 B 1 $822K
85 11949 Manorville 82 B 3 (1 health) $546K
86 11971 Southold 82 B 1 $763K
87 11937 East Hampton 74 B 29 $1009K
88 11901 Riverhead 72 B 32 (1 health) $438K
89 06390 Fishers Island — — 0 —
90 11052 Port Washington — — —
91 11707 West Babylon — — —
92 11715 Blue Point — — 0 $594K
93 11718 Brightwaters — — 0 $711K
94 11739 Great River — — 0 $840K
95 11760 Islandia — — —
96 11765 Mill Neck — — 0 $2000K
97 11775 Melville — — —
98 11789 Sound Beach — — 0 $384K
99 11794 Stony Brook — — 0 —
100 11796 West Sayville — — 0 $572K
101 11930 Amagansett — — 0 $1997K
102 11932 Bridgehampton — — 0 $1951K
103 11940 East Moriches — — 0 $626K
104 11947 Jamesport — — —
105 11948 Laurel — — 2 (1 health) $909K
106 11951 Mastic Beach — — 0 $321K
107 11955 Moriches — — 0 $467K
108 11956 New Suffolk — — 0 $1034K
109 11959 Quogue — — 0 $1781K
110 11960 Remsenburg — — 0 $1231K
111 11962 Sagaponack — — 0 $1933K
112 11969 Southampton — — —
113 11970 South Jamesport — — 2 (1 health) $729K
114 11973 Upton — — —
115 11975 Wainscott — — 0 $2000K
116 11977 Westhampton — — 0 $1039K
117 13438 Remsen — — 0 $177K

Recommended Buyer Guides for Suffolk County

Retailer arrangements don't shape what appears here - the selection logic is independent, filtered against EPA detections and the federal hazard data on file for this county.

Deep Dive Reports

Detailed analysis for Suffolk County, New York

Overview

Suffolk County in New York covers 117 tracked ZIP records with an average Home Safety Score of B (84/100) across 88 scored records.

25 of 110 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 1 health-based violation appear in the available health breakdown.

← Back to New York Home Safety Profile

Data Sources

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

Frequently Asked Questions

Is water safe in Suffolk County?
Suffolk County receives a grade of B, indicating generally safe tap water across its 117 ZIP codes.
How many water systems serve Suffolk County?
Suffolk County is served by 21 public water systems that supply drinking water to residents across 117 ZIP codes.
What is the biggest environmental risk in Suffolk County?
The primary environmental risk factor in Suffolk County is flood. This contributes to an estimated additional annual cost of $4,216 per homeowner.
How old are homes in Suffolk County?
The median home build year in Suffolk County is 1970. 72.1% of homes were built before 1978, which means they may contain lead-based paint and older plumbing materials.
How does Suffolk County compare to New York?
Suffolk County has an average Home Safety Score of 84/100 under model 4.0.0, which is above the New York state average of 84/100.

How to cite this page

APA ZipCheckup. (2026). Suffolk County, NY: HSS 84/100; 1 Health Violation. https://zipcheckup.com/county/new-york/suffolk/
BibTeX 
@misc{zipcheckup-county-new-york-suffolk,
  author = {{ZipCheckup}},
  title  = {{Suffolk County, NY: HSS 84/100; 1 Health Violation}},
  year   = {2026},
  url    = {https://zipcheckup.com/county/new-york/suffolk/}
}

Page version: August 2026.

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