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Nitrogen-Reducing Septic System Cost by Technology (Suffolk County)
Last reviewed October 17, 2026 · Official sources linked throughout
How much does a nitrogen-reducing septic system cost in Suffolk County? Here are the county's published base prices by I/A technology, plus the ongoing costs to budget for.
Price by technology: 1–4 bedroom home, reusing existing leaching
| Technology | Total nitrogen | Lowest | Median | Vendors |
|---|---|---|---|---|
| Hydro-Action AN Series (plastic) | 16.9 mg/L | $17,995 | $25,882 | 33 |
| Hydro-Action AN Series (concrete) | 16.9 mg/L | $19,465 | $27,800 | 19 |
| Orenco Advantex AX-20 | 16.7 mg/L | $24,163 | $24,163 | 1 |
| Norweco Hydro-Kinetic (plastic) | 13 mg/L | $17,115 | $25,950 | 11 |
| Norweco Hydro-Kinetic (concrete) | 13 mg/L | $17,115 | $24,385 | 8 |
| SeptiTech STAAR (plastic) | 15.8 mg/L | $19,820 | $25,154 | 9 |
| SeptiTech STAAR (concrete) | 15.8 mg/L | $20,820 | $25,464 | 7 |
| Fuji Clean CEN Series | 12.7 mg/L | $15,275 | $24,324 | 38 |
Price by technology: 1–4 bedroom home, new gravity leaching
| Technology | Total nitrogen | Lowest | Median | Vendors |
|---|---|---|---|---|
| Hydro-Action AN Series (plastic) | 16.9 mg/L | $20,670 | $29,925 | 33 |
| Hydro-Action AN Series (concrete) | 16.9 mg/L | $22,140 | $30,325 | 19 |
| Orenco Advantex AX-20 | 16.7 mg/L | $28,313 | $28,313 | 1 |
| Norweco Hydro-Kinetic (plastic) | 13 mg/L | $20,890 | $30,100 | 11 |
| Norweco Hydro-Kinetic (concrete) | 13 mg/L | $20,890 | $27,585 | 8 |
| SeptiTech STAAR (plastic) | 15.8 mg/L | $23,595 | $27,654 | 9 |
| SeptiTech STAAR (concrete) | 15.8 mg/L | $24,595 | $28,850 | 7 |
| Fuji Clean CEN Series | 12.7 mg/L | $19,950 | $28,075 | 38 |
Price by technology: 1–4 bedroom home, pressurized shallow drainfield
| Technology | Total nitrogen | Lowest | Median | Vendors |
|---|---|---|---|---|
| Hydro-Action AN Series (plastic) | 16.9 mg/L | $27,370 | $34,925 | 33 |
| Hydro-Action AN Series (concrete) | 16.9 mg/L | $28,605 | $34,738 | 18 |
| Orenco Advantex AX-20 | 16.7 mg/L | $34,463 | $34,463 | 1 |
| Norweco Hydro-Kinetic (plastic) | 13 mg/L | $27,490 | $33,250 | 11 |
| Norweco Hydro-Kinetic (concrete) | 13 mg/L | $27,490 | $33,321 | 8 |
| SeptiTech STAAR (plastic) | 15.8 mg/L | $27,195 | $34,220 | 9 |
| SeptiTech STAAR (concrete) | 15.8 mg/L | $28,195 | $33,792 | 7 |
| Fuji Clean CEN Series | 12.7 mg/L | $24,350 | $33,694 | 38 |
Source: Suffolk County SIP Vendor Cost Ranking, 4-bedroom (rev. 2025-11-06). Base-price estimates only; sales tax, engineering and design are extra and actual costs vary by site. [cost ranking]
Running costs
Plan on an O&M contract (about $300–$600 a year), pumping about every 3 years (about $500), and $75–$250 a year in electricity. [source]
Grants that offset the cost
Suffolk's SIP grant goes up to $20,000 and the state's SSRP up to 75% of eligible costs, capped at $25,000. [source] Estimate yours or compare installers.
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Sources
- Suffolk County – SIP Vendor Cost Ranking, 4-bedroom home (PDF) — rev. 2025-11-06
- Suffolk County DHS – What Homeowners Should Know About I/A OWTS (PDF) — dated 5-5-2026
- Suffolk County – Septic Grants Information Homepage — page accessed Oct 17, 2026
Last reviewed October 17, 2026. Program rules change; always confirm with Suffolk County Department of Health Services (631-852-5811, [email protected]).