Area guideSelden
Water Damage Restoration Help in Selden, NY
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The hamlet of Selden · Town of Brookhaven
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 Selden, 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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None of the 6,453 addresses in Selden is in FEMA's flood zone, so the water that damages homes here usually comes from their own pipes and drains, not from a flood.
Selden at a glanceTap a figure to see it on the map
Flood risk: LowFlood zone. None of the 6,453 addresses here is inside FEMA's mapped flood zone or within about 100 ft of it.
Groundwater. At 3 of the 6,453 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 6,450, water in a basement usually comes in from above.
Each square is about 650 ft across. Color shows the typical depth under its addresses (USGS map, spring 2013):
- 10 to 14 ft3
- 14 to 25 ft391
- Deeper than 25 ft6,059
Sewer. 566 of the 6,453 addresses in Selden have a county sewer main mapped past them. That does not mean every house is connected.
At the other 5,887, 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 650 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 Selden homes
None of Selden's built-up land is in FEMA's flood zone, so floodwater from outside is not the main threat to homes here. Selden's sewer district covers part of the community, with substantial unsewered areas around it. The water damage here starts under and inside the house: a cesspool backing up, a wet basement, a pipe that freezes and splits and an aging pipe giving way.
- 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. At 5,887 of the 6,453 addresses in Selden, wastewater goes to a cesspool or septic tank because no sewer main is mapped past them, so a full or failing system can push sewage back into the house. Cesspool Overflow help in Selden
- Water in the basement. Groundwater in Selden averages 45 ft down, far below any basement floor, so a wet basement here points to a pipe, a downspout or surface runoff, not rising groundwater. Selden's soil drains at a moderate rate, so after a long rain water can sit against the foundation for a while; downspouts that empty well away from the house help. Basement Flooding help in Selden
- A burst pipe. A frozen pipe that has not split yet can be saved: open the tap and warm the line gently from the tap end back, never with a flame. Fuel oil heats about 47% of Selden'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 Selden
- A leak in a wall or ceiling. Mold can start on wet drywall within a day or two, so a slow leak needs the wall opened and dried, not just the pipe fixed. About 62% of Selden'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 Selden
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.
219 streets, from county address records. Nothing you type is sent anywhere.
Streets with a mapped sewer main
County records map an active sewer main past 566 of 6,453 address points in Selden. On 20 streets nearly every address has one; the largest:
- Constance Ln — 64 addresses
- Old Selden Stage Rd — 57 addresses
- Nicole Dr — 55 addresses
- Eve Ann Dr — 47 addresses
- Chuck Ln — 25 addresses
- Samuels Ln — 15 addresses
- Carston St W — 14 addresses
- Edna Ln — 14 addresses
Quick facts — Selden
Flood and storm
- FEMA flood zone
- X (minimal)
In an emergency
- Nearest fire department
- Selden Fire Department
- Nearest emergency shelter
- Suffolk County Community College, Ammerman Campus (Brookhaven Gymnasium)Not 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
- 11784
Homes here
- Sewer status
- Partially Sewered
- Home heating fuel
- 47% fuel oil Utility gas heats 44% of occupied homes in Selden. Census estimates; the oil figure is within 6 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
- 1960s 39% of Selden's homes were built in the 1960s, more than in any other decade band. Census estimate, within 5 points. Homes from the 1960s are about 60 years old. Past 30 years, an insurance-industry study (IBHS) found supply and drain pipe problems three times as likely.
Sources: FEMA NFHL / NOAA SLOSH, US Census ACS, USDA SSURGO, Suffolk County records. Verified 2026-10-18. How we measured this.
Selden and nearby areas
All 4 areas compared here have the same mapped floodplain share.
- Selden 0.0%
- Farmingville 0.0%
- Port Jefferson Station 0.0%
- Terryville 0.0%
Share of developed area inside FEMA's mapped floodplain, largest first.
Selden has the shallowest average groundwater of the 4 areas compared here.
- Selden 45 ft
- Terryville 96 ft
- Farmingville 104 ft
- Port Jefferson Station 121 ft
Average depth to groundwater, shallowest first.
Selden has the lowest average ground of the 4 areas compared here.
- Selden 108 ft
- Terryville 149 ft
- Farmingville 156 ft
- Port Jefferson Station 162 ft
Average height above sea level, lowest first.
Selden measures 45 ft on water table, where its 3 neighbors average 107 ft. Groundwater sits shallower under Selden than under the areas around it. The second gap is ground elevation: 108 ft against 156 ft next door. Selden sits on lower ground than the areas around it.
Compared with the areas around Selden. How we measured them.
Frequently asked questions about Selden
Is Selden in a flood zone?
Selden has no developed land inside a FEMA special flood hazard area, per FEMA's flood map (NFHL). The flood map describes surface flooding only, so it says nothing about groundwater, sewer or plumbing failures.
Does Selden have public sewer, or cesspools?
Selden is partially sewered: roughly 5% of developed land is inside an active sewer district, so whether you're on a cesspool depends on your street.
Where is the nearest emergency shelter to Selden?
The closest Suffolk County emergency shelter to Selden is Suffolk County Community College, Ammerman Campus (Brookhaven Gymnasium). Shelter openings vary by storm — confirm with Suffolk County OEM before traveling to one.
How deep is the water table in Selden?
The measured water table runs about 45 ft below the surface on average across Selden. No address is mapped within 10 ft of it; 394 of 6,453 are within 25 ft.
About the figures for Selden
Check them at the source
Who to call for water damage in Selden
(631) 440-4144Tell us what is happening. We connect you with a local specialist who covers Selden.