Septic Engineer in Hastings, NY

Septic design in Hastings: the short answer

The Town of Hastings has several sewer districts and a lot of houses that are not in any of them. If yours is on a private system and you are building, adding a bedroom or replacing a failed field, you need a septic design approved by the Oswego County Health Department.

Short answer for Hastings: the sand ridges drain, the flats hold water, and organic swamp pockets toward the Oneida River are the hardest ground in town. The deep hole test sorts your lot into one of those, and the system follows.

Sewer or septic in the Town of Hastings

Hastings already runs sewer districts at Fort Brewerton and Caughdenoy; the town has studied inflow and infiltration in both. Treatment for the Fort Brewerton side happens at the Fort Brewerton Wastewater Treatment Plant, and an April 2025 town hearing noted that plant lacks capacity for much more flow.

The South Central Sanitary Sewer District, formed in 2024, would add about 24 miles of sewer main with grinder pumps, two pump stations and an emergency tie to the Caughdenoy pump station. The state notice says properties in that district currently use private septic tanks. Until the main is built and you connect, a failing system needs a septic replacement, not a wait.

How a septic design works in Hastings

1. Send the address and a few photos. Use the form below. Estimate in 1 hour.
2. Confirm the lot needs septic. Find out whether the lot is in the Fort Brewerton, Caughdenoy or South Central district, and whether a main is actually in the road. No main means a septic design.
3. Deep hole and perc tests. At least one test hole six feet deep at the leaching area and at least two perc tests per system, per Appendix 75-A. Expect clean sand on the ridges, mottled sand on the flats, and black organic soil in the old swamp pockets.
4. Design and stamp. Designs are prepared and stamped by a New York licensed Professional Engineer (PE), sized at a minimum of 110 gallons per day per bedroom for a new house.
5. Oswego County plan review. Four sets of plans and the plan review fee go to the Oswego County Health Department, Environmental Health Division, 70 Bunner St., Oswego. The department engineer sends three sets back with a letter of approval or rejection, and a copy of that letter goes to you and to the Town of Hastings code enforcement officer.
6. Building permit and install. With the approval letter in hand, the building permit is pulled through the Town of Hastings code enforcement office. Backwell coordinates the excavation, tank, distribution box and absorption area and builds them to the approved plan.
7. Final paperwork. For an alternative system such as a raised bed, mound or sand filter, state rule 10 NYCRR 75.5 has a design professional supervise construction and certify to the health department that it matches the approved plans.

Soils and seasonal water around Hastings

Hastings sits on the sandy Glacial Lake Iroquois plain north of Oneida Lake. Colonie loamy sand and Elnora loamy fine sand cover the higher ground, and Scriba fine sandy loam sits where a firm layer perches water. The USDA puts the top of the Scriba fragipan 12 to 18 inches down and calls the soil somewhat poorly drained.

Sun and Stockholm soils fill the low ground. Sun is poorly drained and lies in level and concave spots on till plains; Stockholm has a perched water table at 0 to 12 inches. Relict swamp pockets carry organic muck, which is not useable soil for treatment. On those parcels the design either finds mineral soil elsewhere on the lot or builds up.

What the health department checks

Oswego County reviews septic plans itself, at its Environmental Health Division in Oswego. The state sets the floor in Appendix 75-A; a local health department may adopt stricter standards, but not looser ones without a state waiver. On a lot in Hastings the review comes down to a handful of measured items:

• Conventional trench field: at least 4 feet of useable soil above rock, tight soil and the high seasonal groundwater, with the highest groundwater at least 2 feet below the trench bottom.
• Raised system: 1 to 2 feet of original soil faster than 60 minutes per inch, high groundwater at least 1 foot below the surface, fill that percs between 5 and 30 minutes per inch, and a taper no steeper than 1 on 3 with at least 20 feet of taper.
• Mound: high groundwater at least 1 foot down, bedrock at least 2 feet down, native soil faster than 120 minutes per inch, slope no more than 12 percent, pressure distribution, and an absorption area no wider than 20 feet.
• 100 feet from an absorption field, raised bed or mound to a stream, lake, watercourse or wetland, measured to the mean high water mark, and 50 feet from the tank.

Common Hastings site problems and the design fix

Muck pocket where the old field was

An older system dropped into organic swamp soil will not treat effluent. The PE looks for mineral soil elsewhere on the lot first. If the whole lot is wet, a mound needs high groundwater at least a foot down and native soil faster than 120 minutes per inch; if those conditions are not met, the county will not approve a subsurface field there.

Fragipan a foot down on Scriba soil

Water perches on the pan in spring. With less than 2 feet of useable soil a shallow trench is out, and the design goes to a raised bed or mound with pressure distribution.

New house on a sand ridge

Colonie sand on a ridge can take a gravity trench field, but very fast sand needs a blending spec, and the field still has to sit 100 feet from a well and 20 feet from the house.

What it costs

Published county fees, effective January 1, 2026: $125 for the Oswego County Health Department to review plans for one home and $250 for a commercial system, a category the county applies to businesses and rentals. Selling a house? The county lists a 4 day septic dye test with written results at $230.

Design and install are priced together in writing for your lot. Ridge lots near Mallory often take gravity trenches; flats near the river usually need fill, a pump chamber and pressure distribution.

Grant money: Oswego County runs the state Septic System Replacement Fund. Its application says eligible projects can be reimbursed up to 50 percent with a $10,000 maximum, design costs at 50 percent up to $3,000, and every replacement must be county approved, engineer designed and covered by a local building permit. The state priority waters for Oswego County are the central and eastern Lake Ontario shoreline and the upper Little Sandy Creek and its tributaries.

Timeline

Testing, stamped design, Oswego County review, Town of Hastings building permit, then install. The county engineer returns approved sets and copies the Hastings code officer.

Mound sand can go in without the six month settling period that Appendix 75-A requires for raised beds built with finer fill. The schedule is in the written price.

Sources

• Oswego County Health Department: Septic Plan Review
• Oswego County Health Department: Water Supply Protection and Septic Plan Review
• Oswego County Health Department: Plan Review Fee Schedule, effective 1/1/2026
• Oswego County Health Department: Fee Schedule for Environmental Health Services, 1/1/2026
• Oswego County Community Development, Tourism and Planning: Septic System Replacement Grant Application
• NYS EFC: Septic System Replacement Fund Priority Waterbody List
• 10 NYCRR Appendix 75-A.4: Soil and site appraisal (Table 2 separation distances)
• 10 NYCRR Appendix 75-A.8: Conventional subsurface treatment systems
• 10 NYCRR Appendix 75-A.9: Alternative systems (raised, mound, sand filter)
• 10 NYCRR Appendix 75-A.3: Sewage flows
• 10 NYCRR Section 75.5: Minimum standards, design professional, alternative system approval
• NYSDEC ENB: Town of Hastings, South Central Sanitary Sewer District
• NYSDEC ENB: Southern Oswego County Regional Interceptor Sewer
• USDA NRCS Official Series Description: Colonie
• USDA NRCS Official Series Description: Scriba
• USDA NRCS Official Series Description: Sun
• USDA NRCS Official Series Description: Stockholm

Rules and fees as published by the agencies above when this page was written; they can change. The approved plan for your lot controls.