Area guideBayport
Water Damage Restoration Help in Bayport, NY
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The hamlet of Bayport · Town of Islip
Water in the basement, a burst pipe, or sewage backing up into the house? Call and we'll connect you with a local specialist who covers Bayport, even if you don't know the cause yet.
Water doesn't stay where it lands. It soaks into drywall, insulation and flooring, and mold can start within 24 to 48 hours.
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Since 1978, federal flood insurance has paid $6.8 million on 239 claims in ZIP 11705, which takes in Bayport, so water has reached homes here before.
Bayport at a glanceTap a figure to see it on the map
Flood risk: HighFlood zone. 100 of the 3,741 addresses here are inside FEMA's mapped flood zone. 164 more are within about 100 ft of its edge.
If your home is in it, most mortgage lenders must require flood insurance. That is a separate policy from homeowner's insurance, which usually covers a burst pipe or leaking appliance.
The percentage above counts all developed land, including lawns, parks and roads, not just homes.
Each square is about 500 ft across. Color shows how many of its addresses are mapped inside the zone:
- Fewer than half
- Half or more
- All
Groundwater. At 1,411 of the 3,741 addresses measured here, groundwater is within 14 ft of the surface, close enough to reach a basement floor.
In those basements, water can seep up through the floor and come back after pumping. At the other 2,330, water in a basement usually comes in from above.
Each square is about 500 ft across. Color shows the typical depth under its addresses (USGS map, spring 2013):
- Within 10 ft728
- 10 to 14 ft683
- 14 to 25 ft2,115
- Deeper than 25 ft215
Sewer. 98 of the 3,741 addresses in Bayport have a county sewer main mapped past them. That does not mean every house is connected.
At the other 3,643, a backup means a cesspool or septic tank, and a pumping company. On a main, it means a plumber, or the sewer district if the main is blocked.
Each square is about 500 ft across. Color shows how many of its addresses have a mapped main:
- Fewer than half
- Half or more
- All
What is happening at your home?
Other water emergencies we cover
Not sure which one fits? Call (631) 440-4144 and tell us what you see.
Why water gets into Bayport homes
Bayport has two kinds of water risk: flooding from outside, and inside the house, a cesspool backing up, water getting into the basement, a pipe that freezes and splits and old plumbing leaking inside the walls.
- Water coming in from outside. A flood policy expects a signed proof of loss within 60 days of the flood, so document the damage and keep every cleanup receipt from the first day. About 9% of Bayport's built-up land is in FEMA's flood zone, where a home has at least a 1-in-100 chance of flooding in any year. Since 1978, ZIP 11705 has logged 239 federal flood insurance claims, so flood water has reached buildings in this ZIP before. Look up your street. Storm Damage Restoration help
- Sewage coming up a drain. Standard homeowners policies usually exclude sewage backup unless a water-backup endorsement was added, so check yours and photograph the damage before cleanup starts. In Bayport, 3,643 of 3,741 addresses send their wastewater to a cesspool or septic tank in the yard, with no sewer main mapped past them, and a system that is full or failing has nowhere to send it but back into the house. Cesspool Overflow help in Bayport
- Water in the basement. A sump pump with a battery backup keeps running when a storm cuts the power, which is when the ground is wettest. Bayport's water table averages 15 ft, but on some streets it sits close enough to wet a basement floor, so whether seepage is a risk depends on the street. Basement Flooding help in Bayport
- A burst pipe. If a pipe bursts, shut the main water valve first; a split supply line keeps running at full pressure until someone does. Fuel oil heats about 38% of Bayport's homes, so a missed delivery in a cold week can leave a house without heat long enough for a pipe to freeze and split. Frozen Pipe Burst help in Bayport
- A leak in a wall or ceiling. Homeowners insurance usually covers a pipe that bursts suddenly but not one that leaked slowly for months, so a stain or a musty smell is worth acting on early. About 55% of Bayport's homes were built before 1970, and pipes from that era, galvanized steel and cast iron, corrode from the inside until a joint or a section gives way. Ceiling & Roof Leak Water Damage help
Insurance and safety guidance from FEMA FloodSmart, the CDC and the Red Cross. How we measured the figures.
Street by street in Bayport
See how many of its addresses are mapped inside the FEMA flood zone, how deep groundwater is mapped under it, and whether a sewer main is mapped past it.
122 streets, from county address records. Nothing you type is sent anywhere.
Streets inside the FEMA flood zone
100 of 3,741 address points in Bayport are mapped inside a FEMA special flood hazard area. These streets hold the most of them:
- Harriet Rd — 10 of 16 addresses
- S Snedecor Ave — 10 of 35 addresses
- Bayview Ave — 9 of 67 addresses
- Oak Rd — 8 of 10 addresses
- Gerritsen Ave — 8 of 50 addresses
- Paulanna Ave — 8 of 41 addresses
- Bay Ave — 7 of 42 addresses
- Browns River 3 Rd — 6 of 6 addresses
Streets with a mapped sewer main
County records map an active sewer main past 98 of 3,741 address points in Bayport. On 5 streets nearly every address has one; the largest:
- Durham Ln — 13 addresses
- Cheshire Ct — 8 addresses
- Glenwood Ct — 8 addresses
- Hollins Ln — 8 addresses
- Radley Ct — 5 addresses
Quick facts — Bayport
Flood and storm
- FEMA flood zone
- AE (100-yr floodplain)
- Hurricane Sandy high-water mark
- 5.5 ft The one mark USGS surveyed in Bayport after the 2012 storm, in feet above the NAVD88 datum — a reading at one point, not a level across all of Bayport. Ground elevation here averages 22 ft on the same datum.
- Water nearby
-
Great South Bay to the south, Sans Souci Lakes to the north-west and Brown's River to the south-west.
Each direction is to its nearest point, from the center of Bayport.
All 5 named water features
- South-east: Namkee Creek
- South: Great South Bay, Homans Creek
- South-west: Brown's River
- North-west: Sans Souci Lakes
Bayport's land area
- FEMA coastal wave zone (VE)
- FEMA 100-year floodplain (A, AE)
- The flood-zone figure above says how much of the land these zones cover.
Homes here
- Sewer status
- Unsewered (Cesspool/Septic)
- Home heating fuel
- 38% fuel oil Utility gas heats 48% of occupied homes in Bayport. Census estimates; the oil figure is within 7 points. An oil tank can float or tip in a flood and spill. That is a separate cleanup from the water (NYS DEC). In a cold snap, an empty tank means no heat.
- When homes were built
- 1950s 26% of Bayport's homes were built in the 1950s, more than in any other decade band. Census estimate, within 7 points. Homes from the 1950s are about 70 years old. Past 30 years, an insurance-industry study (IBHS) found supply and drain pipe problems three times as likely.
In an emergency
- Nearest fire department
- Bayport Fire Department
- Nearest emergency shelter
- Saxton Middle SchoolNot every shelter opens for every storm, and the nearest may stay closed. Suffolk County announces which ones open; follow its alerts and local news before you go.
- ZIP code
- 11705
Sources: FEMA NFHL / NOAA SLOSH, US Census ACS, USDA SSURGO, Suffolk County records. Verified 2026-10-18. How we measured this.
Bayport and nearby areas
3 of the other 6 areas compared here have a larger mapped floodplain share than Bayport.
- Patchogue 19.4%
- West Sayville 16.7%
- Blue Point 15.4%
- Bayport 9.0%
- Sayville 5.3%
- North Patchogue 3.6%
- Holbrook 0.0%
Share of developed area inside FEMA's mapped floodplain, largest first.
3 of the other 6 areas compared here have shallower average groundwater than Bayport.
- Patchogue 10 ft
- Blue Point 13 ft
- West Sayville 13 ft
- Bayport 15 ft
- Sayville 16 ft
- North Patchogue 18 ft
- Holbrook 51 ft
Average depth to groundwater, shallowest first.
3 of the other 6 areas compared here have lower average ground than Bayport.
- West Sayville 17 ft
- Blue Point 17 ft
- Patchogue 18 ft
- Bayport 22 ft
- Sayville 31 ft
- North Patchogue 42 ft
- Holbrook 92 ft
Average height above sea level, lowest first.
Bayport's ground elevation is 22 ft, close to the 36 ft average across the 6 areas around it — a typical reading for the area rather than an outlier.
Compared with the areas around Bayport. How we measured them.
Frequently asked questions about Bayport
Is Bayport in a flood zone?
Bayport's FEMA-mapped flood zone is AE (100-yr floodplain), covering about 9.0% of the developed area, per FEMA's flood map (NFHL).
Does Bayport have public sewer, or cesspools?
Bayport is unsewered — nearly every property runs on its own cesspool or septic system.
How old are homes in Bayport?
The average home in Bayport is about 59 years old, and 55% of the housing stock predates 1970 — older plumbing and unwaterproofed foundations are a common factor in local water damage.
Where is the nearest emergency shelter to Bayport?
The closest Suffolk County emergency shelter to Bayport is Saxton Middle School. Shelter openings vary by storm — confirm with Suffolk County OEM before traveling to one.
About the figures for Bayport
Check them at the source
Who to call for water damage in Bayport
(631) 440-4144Tell us what is happening. We connect you with a local specialist who covers Bayport.