Independent guide. Not affiliated with, endorsed by, or operated by Suffolk County, New York State, or any installer.

Replace your cesspool with up to $45,000 in grants

Suffolk County and New York State offer grants for replacing cesspools and old septic systems with nitrogen-reducing I/A systems. Check what you may qualify for, see the county's approved installers and their published prices, and get quotes.

Check my grant (2 min)Get installer quotes
Up to $20,000Suffolk County SIP grant per property, depending on whether your project qualifies [county]
Up to $25,000NY State SSRP: up to 75% of program-eligible costs, capped at $25,000 per property [county]
Up to $45,000combined state + county, per the county's 2026 flyer [flyer]
$25,688median county-published base price, 4-bedroom home reusing existing leaching (excludes engineering, permits, sales tax) [cost ranking]

How it works

1. Check eligibilityExisting home on a cesspool or septic system, not on sewers or in a proposed sewer district, valid C.O., taxes current. [source]
2. Apply before you installYou must apply for, and be issued, the grant before installation. One county application covers both the county and state grants. [source]
3. Choose an approved installerOnly installers on the county's approved list can install grant-funded systems; the county pays them directly. [source]
4. Install & inspectCounty inspectors check the installation; grant payments go to the installer after certification. [source]

Compare the county's 40 approved installers

Suffolk County publishes a list of approved installers (revised 09-14-2026) and a vendor cost ranking of base-price estimates. For a typical 1–4 bedroom home reusing the existing leaching structure, published prices range from $15,275 to $45,025 (median $25,688) before engineering, permits and sales tax. [cost ranking]

Browse installersCompare published prices

Guides

Suffolk County Septic Grant (2026): Amounts, Eligibility & RulesSIP up to $20,000 + NYS SSRP up to $25,000: who qualifies, what's covered, how it's paid.How to Apply for the Suffolk County Septic Grant, Step by StepThe county's 8-step process from application to grant payment.Cesspool Replacement Cost on Long Island (Suffolk County Prices)County-published I/A system prices by home size and scenario, plus ongoing costs.What Is an I/A OWTS? Suffolk County's Nitrogen-Reducing Septic SystemsHow innovative/alternative septic systems work, approved technologies and upkeep.Nitrogen-Reducing Septic System Cost by Technology (Suffolk County)Published prices for Hydro-Action, Fuji Clean, Norweco, SeptiTech and Orenco systems.NY State Septic System Replacement Program (SSRP) for Suffolk Homeowners75% up to $25,000 for enhanced systems: eligibility, seasonal homes, payment.Suffolk Septic Grant Priority Areas & Ranking ExplainedHow failures and groundwater travel time decide who gets funded first.

Get quotes from county-approved installers

Tell us about your property and we'll help connect you with installers on Suffolk County's approved list. Free, no obligation.

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Not a government site. Independent guide. Not affiliated with, endorsed by, or operated by Suffolk County, New York State, or any installer. To apply, use the county's official portal at suffolkcountyny.gov/septicgrants or call 631-852-5811.

Sources

Last reviewed October 17, 2026. Program rules change; always confirm with Suffolk County Department of Health Services (631-852-5811, [email protected]).