Sewer (Wastewater)

The Wastewater Division is responsible for operating, monitoring and maintaining the City's Wastewater Treatment Plant (WWTP).  It's Collections Division is responsible for cleaning wastewater mains, drain inlets, catch basins, and for making repairs to wastewater mains and residential laterals.  Wastewater lines are cleaned and camera inspected year round to prevent Sanitary Sewer Overflows and to ensure the integrity of the collection system. 


The Wastewater Treatment Plant:
  • Receives wastewater from over 16,800 connections.
  • Has approximately 200 miles of sewer mains and lateral connections.
  • Has the current capacity to treat 5.0 million gallons of wastewater per day (MGD).
  • Discharges treated and disinfected effluent into Marsh Creek that meets or exceeds CA Title 22 drinking water standards.
  • Recycles a portion of the treated water for use on landscaping, parks and some businesses.
  • Was designed and built to allow the City to expand to an average dry weather flow of 10 MGD for City build out.

Water Softener Removal/Replacement Financial Incentive Program

Water Softener Financial Incentive Program Ending June 30, 2018
The City's Water Softener Financial Incentive Program will be ending on June 30, 2018. After June 30th, the City will no longer be accepting:

  • Chloride Brine-Discharging Water Softener Removal/Replacement Incentive applications. Residents with approved applications will be required to complete the removal/replacement process within the timeframe specified in their Notice to Proceed letter. 
  • First Time Purchaser Incentive applications. Applications must be received by June 30, 2018, and include a purchase receipt which verifies unit has been purchased and installed by June 30, 2018.

For more information on the above referenced program, click here.​

WWTP Diagram & Process

The City's Wastewater Treatment Plant is a 5.0 million gallon per day (MGD) extended aeration/activated sludge facility.  The treatment plant discharges tertiary treated effluent into Marsh Creek.  This effluent meets or exceeds CA Title 22 drinking water standards.  The treatment plant was designed and built to facilitate an expansion to an average dry weather flow of 10 MGD.

Sanitary Sewer Management Plan (SSMP)

The City's sewer collection system is operated and maintained in accordance with provisions set forth in the SSMP.  This document outlines how the collection system is designed, operated, and maintained in normal and emergency situations, and provides guidance and direction to ensure that the system is operated efficiently and in accordance with industry best practices. ​

SSMP Bi-Annual Audit