Short answer: No active county sewer district covers Bohemia on the county's GIS layer, so homes here use cesspools, septic tanks or I/A systems unless a village or private plant serves them. 16% sits in a proposed sewer district, which can rule out the septic grants.
Bohemia in numbers
| Town | Town of Islip |
|---|---|
| Area | 8.64 sq mi |
| In active sewer district | 0% |
| In proposed district | 16% · MacArthur Airport/Industrial |
| Groundwater zone | Zone I 100% |
| FEMA flood zone | 4% |
| One-family lots / median | 2,170 / 0.46 ac |
| One-family lots outside active sewer districts | about 2,170 |
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
No active county sewer district covers Bohemia on the county's GIS layer, so homes here use cesspools, septic tanks or I/A systems unless a village or private plant serves them. About 16% of Bohemia is inside proposed districts (“MacArthur Airport/Industrial”). Suffolk's septic grants exclude homes in a proposed sewer district, so check the address on the county map before budgeting for an I/A upgrade. Counting lots instead of land: about 2,170 of the 2,170 one-family lots touching Bohemia lie outside any active sewer district, and those homes rely on on-site systems. Next door: Oakdale (0% sewered, median lot 0.32 ac); Sayville (0% sewered, median lot 0.28 ac); North Great River (1% sewered, median lot 0.46 ac). By active-sewer share Bohemia ranks 85 of the 165 Suffolk hamlets and villages we measured.
Groundwater, lots and flood exposure
Groundwater management Zone I: Article 6's minimum lot for a new home on an on-site system here is 20,000 sq ft, unless the density is met another way or an exemption applies. County parcel records show 2,170 one-family lots touching Bohemia, with a median of 0.46 acres (about 20,100 sq ft), above that minimum and the 68th-largest median lot in our Suffolk table. 4% of the land is in FEMA's 1%-annual-chance flood zone.
Before planning an I/A upgrade in Bohemia, confirm whether your street is in the proposed district; if it is, the county and state grants may not apply.
Who handles what in Bohemia
- Building and electrical permits: Town of Islip
- System approvals and grants: SCDHS, 631-852-5700 (permits) / 631-852-5811 (grants)
Frequently asked questions
Is Bohemia on public sewer?
Generally not: no active county sewer district covers Bohemia on the county's map.
Can Bohemia homeowners get septic grants?
Yes, if the home isn't sewered and isn't in a proposed sewer district (about 16% of Bohemia is): up to $20,000 from Suffolk and up to $25,000 from the state.
County rules, licensing and grant steps: Town of Islip overview, septic grants, replacement rules. More in Islip: Oakdale, Sayville, Ronkonkoma, Holbrook.
Sources
Each source was re-read on November 7, 2026. Program amounts and rules change; the agency page is the authority.
- Suffolk County GIS Viewer map service (hamlets, villages, sewer districts, groundwater zones, flood zones, tax parcels)
- Suffolk County Sanitary Code, Article 6 (amended 12/1/2020)
- Suffolk County: Septic Improvement Program information
- Suffolk County: SIP property eligibility lookup
Need cesspool or septic work in Bohemia?
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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