Farmingville, NY Cesspool & Septic: Sewer, Rules, Grants

Short answer: About 3% of Farmingville lies inside College Park Sewer District; everywhere else, wastewater stays on the lot.

Farmingville in numbers

Town	Town of Brookhaven
Area	4.18 sq mi
In active sewer district	3% · College Park Sewer District
In proposed district	9% · Middle Country Road
Groundwater zone	Zone III 83%, Zone I 17%
FEMA flood zone	0%
One-family lots / median	4,016 / 0.28 ac
One-family lots outside active sewer districts	about 3,774

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

About 3% of Farmingville lies inside College Park Sewer District; everywhere else, wastewater stays on the lot. A sliver (9%) is inside a proposed district (“Middle Country Road”). By parcel count, roughly 3,774 of Farmingville's 4,016 one-family lots sit outside an active district; that is the local cesspool and septic population, before counting unconnected lots inside districts. Next door: Holtsville (8% sewered, median lot 0.34 ac); Selden (5% sewered, median lot 0.22 ac); Medford (7% sewered, median lot 0.34 ac). By active-sewer share Farmingville ranks 48 of the 165 Suffolk hamlets and villages we measured.

Groundwater, lots and flood exposure

Groundwater management Zone III (83%) and Zone I (17%): Article 6's minimum lot for a new home on an on-site system here is 40,000 sq ft in Zones III, V and VI, unless the density is met another way or an exemption applies. County parcel records show 4,016 one-family lots touching Farmingville, with a median of 0.28 acres (about 12,300 sq ft), below that minimum and the 107th-largest median lot in our Suffolk table. No part of Farmingville is mapped in a flood zone of note, a groundwater protection area or the Pine Barrens.

For most Farmingville 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 Farmingville

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

Frequently asked questions

Is Farmingville on public sewer?

Partly: about 3% is inside College Park Sewer District; the other 97% relies on cesspools, septic tanks and I/A systems.

Can Farmingville homeowners get septic grants?

Yes, if the home isn't sewered and isn't in a proposed sewer district (about 9% of Farmingville is): 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: Holtsville, Selden, Medford, Coram.

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 Farmingville?

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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