Cesspool & Septic Service in Coram, NY: Sewer, Rules, Grants

Short answer: Coram is split: about 22% of its land is inside Selden Sewer District and the rest relies on cesspools, septic tanks and I/A systems.

Coram in numbers

Town	Town of Brookhaven
Area	13.83 sq mi
In active sewer district	22% · Selden Sewer District
In proposed district	3% · Middle Country Road
Groundwater zone	Zone III 100%
FEMA flood zone	0%
One-family lots / median	6,837 / 0.36 ac
One-family lots outside active sewer districts	about 3,737

Computed 2026-11-07 from Suffolk County GIS (hamlet boundaries, sewer districts, groundwater management zones, FEMA flood zones, protection areas, tax parcels). Shares are of land area; a district boundary is not a hookup, and some village-run systems are missing from the county layer. Method and full table.

Sewer coverage

Coram is split: about 22% of its land is inside Selden Sewer District and the rest relies on cesspools, septic tanks and I/A systems. A sliver (3%) is inside a proposed district (“Middle Country Road”). Counting lots instead of land: about 3,737 of the 6,837 one-family lots touching Coram lie outside any active sewer district, and those homes rely on on-site systems. For comparison, the nearest places: Gordon Heights (0% sewered, median lot 0.29 ac); Selden (5% sewered, median lot 0.22 ac); Farmingville (3% sewered, median lot 0.28 ac). By active-sewer share Coram ranks 25 of the 165 Suffolk hamlets and villages we measured.

Groundwater, lots and flood exposure

Groundwater management Zone III: Article 6's minimum lot for a new home on an on-site system here is 40,000 sq ft, unless the density is met another way or an exemption applies. County parcel records show 6,837 one-family lots touching Coram, with a median of 0.36 acres (about 15,600 sq ft), below that minimum and the 86th-largest median lot in our Suffolk table. Also mapped: 98% is in a Special Groundwater Protection Area; 41% is Pine Barrens Compatible Growth Area.

For most Coram homes the main running cost is pumping; when a cesspool fails, the replacement must include at least a septic tank, and grants can cover most of an I/A system.

Who handles what in Coram

Building and electrical permits: Town of Brookhaven
Sewer: Selden Sewer District
System approvals and grants: SCDHS, 631-852-5700 (permits) / 631-852-5811 (grants)

Frequently asked questions

Is Coram on public sewer?

Partly: about 22% is inside Selden Sewer District; the other 78% relies on cesspools, septic tanks and I/A systems.

Can Coram homeowners get septic grants?

Yes, if the home isn't sewered and isn't in a proposed sewer district: up to $20,000 from Suffolk and up to $25,000 from the state.

County rules, licensing and grant steps: Town of Brookhaven overview, septic grants, replacement rules. More in Brookhaven: Selden, Farmingville, Middle Island, Medford.

Sources

Each source was re-read on November 7, 2026. Program amounts and rules change; the agency page is the authority.

Need cesspool or septic work in Coram?

Submit a request with your address. We match it to an independent, licensed Suffolk County operator who serves that address; the operator confirms the time and price with you.

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