Septic Systems in Ontario County, NY

Regulations, costs, soil data & local providers

Pop. 112,458 ~16.5% on septic ~7,422 septic homes Well drained soil

Septic pumping in Ontario County, New York costs $400-$750 (avg $550). A new septic system installation costs $7,550-$15,100. USDA soil data rates 0% of county soils as suitable for septic absorption fields. Approximately 7,422 homes in this county use septic systems.

Septic System Costs in Ontario County

ServiceLowAverageHigh
Pumping / Cleaning$400$550$750
Routine Inspection$300$400$550
Real Estate Inspection$500$750$1050
Minor Repair$950$1,350$6,600
Conventional Installation$7,550$10,800$15,100
Aerobic System Installation$14,200$20,250$28,350
Drainfield Replacement$7,550$10,800$15,100
Perc Test$1,100$1,600$2,250

Cost estimates based on regional market data for Ontario County, New York. Actual costs depend on system type, site conditions, and provider.

Soil & Septic Suitability in Ontario County

Drainage Class
Well drained
Hydrologic Group
D
Unique Soil Types
89
Avg Bedrock Depth
2.2 ft

Dominant Soil Types

Soil SeriesCoverageDrainageHydro Group
Palmyra 1133 Well drained B
Arkport 983 Well drained A
Ontario 900 Well drained B
Dunkirk 839 Well drained C
Honeoye 804 Well drained B

Septic Tank Absorption Field Suitability

USDA NRCS rates soil suitability for septic absorption fields across this county:

Not Limited (Good)0%
Somewhat Limited6.6%
Very Limited93.4%

Overall rating: Very limited

Source: USDA NRCS Soil Survey Geographic Database (SSURGO)

Groundwater & Water Table in Ontario County

Monitoring Wells
9
Avg Depth to Water
17 ft
Median Depth
3 ft
Shallowest Recorded
1.6 ft Shallow Risk

Water table depths in this county are generally favorable for conventional septic systems.

Source: USGS National Water Information System. Based on 134 measurements from monitoring wells.

Septic Regulations & Permits in Ontario County

State Regulatory Body
New York State DEC
Inspection Required for Home Sale
No / Varies
Nitrogen Reduction Areas
Yes
Advanced Treatment Required
In designated areas

Suffolk County and Long Island have strict nitrogen rules. County health departments issue permits.

Contact the Ontario County health department for current permit requirements, fees, and approved system types.

Septic System FAQ for Ontario County

How much does septic pumping cost in Ontario County?
Septic pumping in Ontario County, New York typically costs between $400 and $750, with an average of $550. Costs vary by tank size (1,000-1,500 gallons is typical), ease of access, distance from the pumping company, and how full the tank is. Most homeowners should pump their tank every 3-5 years.
How much does a new septic system cost in Ontario County?
A conventional septic system installation in Ontario County typically costs $7,550-$15,100. An aerobic treatment unit (ATU) costs $14,200-$28,350. Given the predominantly well drained soils in this area, some sites may require alternative system types. Costs include the tank, drainfield, permits, and labor.
Do I need a permit for a septic system in Ontario County?
Yes. Virtually all counties in New York require a permit before installing, repairing, or replacing a septic system. The permit process typically involves a soil evaluation or percolation test, system design by a licensed professional, application to the county health department, and one or more inspections during installation. Contact the Ontario County health department for current requirements and fees.
What soil types are in Ontario County and how do they affect septic systems?
Ontario County has predominantly Palmyra, Arkport, Ontario soils. The dominant drainage class is Well drained with hydrologic group D. The USDA rates 0% of surveyed soils as "Not Limited" for septic absorption fields, 6.6% as "Somewhat Limited", and 93.4% as "Very Limited".
How often should I pump my septic tank in Ontario County?
The EPA recommends pumping your septic tank every 3-5 years for a typical household. The exact frequency depends on tank size, household size, and water usage. A 1,000-gallon tank serving a family of 4 should generally be pumped every 3 years. With approximately 7,422 septic systems in Ontario County, there are many local providers offering regular pumping services.
Can I install a conventional septic system in Ontario County?
It depends on your specific site. USDA soil data shows that 93.4% of soils in Ontario County are rated "Very Limited" for septic absorption fields, while only 0% are "Not Limited." This means many properties will require alternative systems such as mound systems, pressure distribution systems, or aerobic treatment units. A percolation test ($1100-$2250) and soil evaluation are required before the county will approve a system design.
How long does a septic system last in Ontario County?
A well-maintained septic system in Ontario County typically lasts 25-30 years, though some components may need attention sooner. The concrete septic tank itself can last 40+ years, while the drainfield — the most critical and expensive component — usually lasts 15-25 years depending on soil conditions (Ontario County has predominantly well drained soils). Regular pumping every 3-5 years and avoiding excess water usage are the two most effective ways to extend system life.

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Quick Facts

Population112,458
Est. Septic Homes7,422
Avg Pumping Cost$550
Drainage ClassWell drained
Septic SuitabilityVery limited

More in New York

Yates County Wayne County Seneca County Livingston County Monroe County Schuyler County

Common Septic Services

Pumping: $400-$750
Inspection: $300-$550
Repair: $950-$6,600
Installation: $7,550-$15,100

Data last updated: 2026-04-13