Wastewater Treatment Plant

11 Silas Lane
Oneonta, NY 13820

Telephone: (607) 432-7210
E-mail:  cpelligra@oneonta.ny.us


Frequently Asked Questions

Chris Pelligra - Chief Operator
Scott Burger - Senior Operator
Jared Vagliardo - Operator
Andrew Michael Nader - Operator
Jason Bouton - Maintenance 

Brief History

The present wastewater facility was completed in 1977 and put into operation the same year. Under its State Pollutant Discharge Elimination System (SPDES) permit # NY0031151, the plant can treat a maximum flow of 4.0 million gallons per day (MGD). The treatment process consists of preliminary treatment, primary treatment, secondary treatment by trickling filter and rotating biological contactors, final settling, and phosphorus removal by Polyaluminum chloride addition. Sodium hypochlorite is added for disinfection, and sodium bi-sulfate is added for dechlorination. The final plant effluent is discharged to the Susquehanna River, which is tributary to the Chesapeake Bay Watershed. In addition, thickened sludge is anaerobically digested, belt pressed, placed in drying beds, and subsequently trucked to a land fill.  

The plant has gone through several upgrades. The first being in 1991 when the City of Oneonta approved construction of an aluminum dome to cover trickling filter #1. This kept trickling filter #1 warmer so the biological activity would continue through the winter months. This improved plant effluent quality to ensure permit compliance.

The second upgrade came in 1996 when the City of Oneonta approved construction of a bank of rotating biological contactors for ammonia removal. At this time, a sludge belt press was also installed for dewatering and sludge then began to be hauled to various landfills.

The plant has weathered two floods, the first being in 1981, with the most recent in 2006. In addition to flood mitigation measures, several improvements were completed following the 2006 flood, including new oil/natural gas and methane boilers, a complete control system for influent and effluent pumps, new air compressor and air handling system, an above flood level emergency generator, fuel tanks, and plant electrical rewiring.

Currently, funding has been secured and design is underway for a major plant upgrade, which will replace much of the older plant equipment that is nearing the end of its anticipated useful life, and will sustain, improve and/or enhance existing treatment processes. A new supervisory control and data acquisition (SCADA) system and replacement of all electrical motor control centers (MCC’s) will be included, as well as plumbing and HVAC upgrades.

The City of Oneonta employs five people at the wastewater plant – four certified operators and one maintenance worker.

Picture Descriptions in display order:

1. Secondary Digester
2. Primary Settling
3. Rotating Biological Contractors
4. Trickling Filter

WWTP-Secondary Digester Photo.jpgWWTP-Primary Settling.jpgWWTP-Rotating Biological Contactors.jpgWWTP-Trickling Filter.jpg


Services Provided

The Wastewater Plant serves the City of Oneonta, the Town of Oneonta and accepts septage from the local septic haulers. RV septic is also accepted at no charge.

Sewer Backup information

A sewer backup creates a stressful and emotional situation for homeowners or renters. Although the City of Oneonta makes every effort to prevent such incidents, they may still occur. The following information is offered to help property owners and residents understand why backups happen, how they can be prevented, and what steps citizens should take if a sewer backup affects their property.

More information about Sewer Backup Insurance.

Final modified and renewed SPDES Permit #NY0031151 for the City of Oneonta, New York, effective date September 1, 2014 

Part 1     Part 2     Part 3