Pretreatment Resources

wrf.jpgThe City of Surprise (City) owns and operates water reclamation facilities (WRFs): In its Special Planning Areas, these facilities are vulnerable to the discharge of toxic or harmful pollutants from residential, commercial, or industrial users. The treatment facilities are designed to reduce the quantities of organic materials, solids, and nitrogen in the wastewater, making it suitable for reuse or recharge to the aquifer.

The objectives of the City’s Pretreatment Program are to:
  • facilitate the control of pollutant discharges into the collection system
  • resolve collection system blockage and capacity reduction issues
  • protect the treatment facilities from upsets
  • maintain high effluent and biosolids quality
  • protect plant workers, the environment, and the public while promoting good relationships with its users

Pretreatment Prevents Sewer Clogs


greasecloggedpipe_sm.jpgFats, Oils and Greases (FOG) can have a detrimental impact to the City’s wastewater treatment system and the environment. Over time, these deposits can clog sewer lines, restrict flow and ultimately cause a sewer system back up, resulting in a sanitary sewer overflow (SSO). The result is a negative impact to public health, as sewer water is forced out of a manhole cover, onto the ground, and/or into businesses and homes.

While FOG can originate from individual homes, it is introduced primarily from food service establishments that prepare and serve food for commercial purposes. City Code requires grease interceptors for the following commercial facilities:
  • Restaurants- All types, Fast food. Pizza delivery, Sandwich shop, Bakeries
  • Services Stations- Auto repair, Car washes, Fuel Stations
  • Pet Grooming, Salons- Hair traps
  • Laundries- Lint/Hair traps
  • All photo processing facilities, dental offices, and x-ray processing facilities shall be equipped with a metal recovery unit