Solid Waste

2016 Ontario County Solid Waste Symposium

Thank you to all who were able to attend Ontario County's first Solid Waste Symposium. We want to send a big appreciation out to all of the presenteres who spke about very interesting and important topics occurring around our COunty and the State. If you missed the Symposium and would like to view the presentations please use the links below. 

Ontario County Landfill

Ontario County owns and operated the landfill located on the south side of Routes 5 and 20 in the Town of Seneca, NY from 1974 through 2003. In 2003, the County signed a lease agreement with New England Waste Services of NY and Casella Waste Systems, Inc (Casella), to operate the landfill and oversee all aspects of daily operations.

Ontario County and Casella take landfill odor control very seriously. If you smell odors offsite please notify us by calling the landfill office at 585-526-4420 during normal business hours, or click here.

This form will also give you the option to request inclusion on a mailing list for periodic notices about ongoing construction and other activity at the landfill.

Notice of Violation Update:

The following are additional actions taken by Casella between 9/6/17 and 10/18/17 to comply with requirements of the Notice of Violation issued by the NYSDEC on 9/6/17:

  • Hydroseeding was completed on approximately 22 acres of side slope on the eastern, northern and western slopes to provide slope stability, resist erosion and reduce amount of sediment.
  • Prior to seeding, side slopes were tracked with a bull dozer to compact newly placed soil, control effects of erosion, and aid in seeding.
  • Diversion swales were created along the southern and western areas to divert storm water from sediment pond 2 to sediment pond 5.
  • Approximately 6 acres temporary cap was installed to lessen the impact of sediment and leachate.
  • Sediment was removed from storm water ditches and ponds to return the runoff collection system to the designed capacity.

The NYSDEC also performed 10 onsite inspections between 9/6/17 and 10/18/17.  If you have questions, please call the Ontario County Planning Department during regular business hours at 585-396-4455.

Link to initial 9/18/17 written response to NYSDEC regarding the Notice of Violation 

Related Operations

The Materials Recycling Facility (MRF) is adjacent to the landfill and is operated by Casella. The MRF accepts recyclable materials from Ontario and 17 other Counties.
There is a gas-to-energy plant on the landfill site that is operated by Innovative Energy Solutions (IES). A series of pipes and wells collects gases produced by the decomposing waste. IES uses the collected gas to produce electricity which is then returned to the electrical grid.


The New York State Department of Environmental Conservation and the US Environmental Protection Agency issue permits, review and approve plans for construction, and perform regular inspections of landfill operations to ensure compliance with applicable laws and regulations. The Ontario County Landfill is not permitted to accept hazardous waste, medical waste, or radioactive materials.

Ontario County has received the necessary permits to expand the landfill footprint so that it can continue to accept waste through 2028. Construction of the first expansion is ongoing and should be completed in the fall of 2016 with a new leachate collection pond and two new cells.

Interested in Recycling, Diversion, waste reduction, e-waste disposal, hazardous material disposal, or just finding waste haulers that serve your residence or business? Please visit our Recycling/Waste Diversion Web Page by clicking here!