Wastewater Treatment

Wastewater collected by the City sewer system flows to the Wastewater Treatment Plants, where it undergoes a multi-faceted biological process to separate out the solids and treat the water for reuse and recharge. The treated water, called effluent, is sold for use in watering golf courses and construction to reduce potable water demand. The settled solids are dewatered and then hauled off to a landfill for cover. The City has two Wastewater Treatment Plants, the Sundog Wastewater Treatment Plant and Airport Water Reclamation Facility.

Sundog Wastewater Treatment Plant

The Sundog Wastewater Treatment Plant, owned and operated by the City of Prescott is located at 1500 Sundog Ranch Road in Prescott, Arizona. The facility is capable of treating up to 6.0 million gallons/day (MGD) of domestic sanitary sewage and hauled wastewater from commercial haulers.
The Sundog WWTP was constructed in 1979 as an extended aeration oxidation ditch facility. The process expanded in 1989 adding final clarifiers, sand filters and anaerobic digesters. In 2013, nitrification/denitrification improvements were made to the activated sludge process with the addition of submersible mixers, mixed liquor recycle pumps, additional aeration diffusers, dissolved oxygen probes and SCADA upgrades. The facility produces Class B+ effluent suitable for golf course irrigation and recharge to the underlying aquifer at the Airport Water Reclamation Facility.
The aerial photo below shows the existing Sundog WWTP.


Airport Water Reclamation Facility

The Airport Water Reclamation Facility, owned and operated by the City of Prescott is located at 2800 Melville Road in Prescott, Arizona. The facility is capable of treating up to 3.75 million gallons/day (MGD) of domestic sanitary sewage and industrial wastewater from the Airpark Industrial area.
The facility completed a major expansion in 2014 to add capacity for increasing wastewater flows. Class A+ effluent is produced and utilized for golf course irrigation and for recharging the aquifer through one or more of the eight percolation basins located on-site. Effluent is used for irrigation and recharge purposes in percolation basins near the Airport WRF to establish artificial recharge credits in the underlying aquifer.
The aerial photo below shows the existing Airport WRF.


  • Utilities
  • Benjiman Metzler
  • Airport Water Reclamation Facility Operations Supervisor
  • Airport WRF

    2800 Melville Rd

  • (928) 777-1641
  • Utilities
  • Scott Gregorio
  • Wastewater Superintendent
  • Sundog WWTP

    1500 Sundog Ranch Rd

  • 928-777-1630


  • Visit the City of Prescott website for a list of current job openings.

  • In order to purchase effluent water for construction use call (928) 777-1630.

  • To schedule a tour call (928) 777-1630 M-F between the hours of 7:00 AM and 3:30 PM

  • The first step is to get approval from Wastewater Treatment by calling (928) 777-1630. If approval is granted, you must open an account at Solid Waste located at 2800 Sundog Ranch Road.

  • It is safe to dispose dirty household water, human waste and toilet paper. Items that are not safe to dispose are flushable wipes, dental floss, Q-tips, and plastics do not break down in water and are harmful to the wastewater collection system and wastewater treatment facilities.

  • Effluent can only be used for specific purposes such as irrigation for golf courses, washing and sieving aggregate materials, and dust abatement on construction projects. For a complete list of permissible activities, call (928) 777-1630.

  • The Sundog WWTP RV Dumping Station located at 1500 Sundog Ranch Road, is open from 7:30 a.m. to 2:00 p.m. Monday thru Friday and closed on weekends and Holidays.


Covid-19 Vaccine Clinic

Posted on January 11, 2022

Tuesday, January 25 1 pm – 3 pm Founders Suite on the 1st floor at Prescott Public Library Yavapai County Community Health Services (YCCHS) will be on site to provide COVID-19 Moderna 1st and 2nd dose vaccines and boosters. Please… Read more »

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