Maintaining the Collection System
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5607 West Jensen Ave.
Fresno, CA 93706
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WMD – Collection System Maintenance (CSM) business hours of operation are Monday through Friday from 06:00 AM to 02:30 PM. Staff is on-call to respond to sanitary sewer emergency calls 24/7, including weekends and holidays.


  • CSM services the City’s sanitary sewer system through a scheduled preventive maintenance program
  • Routine cleaning is scheduled for pipes 6” to 24” in diameter which are cleaned once a year or once every two years.
  • Areas of increased maintenance or “Hot Spots” are serviced more frequently and could be every 30, 60, 90 or 180 days intervals.
  • Lift stations are maintained on a semiannual basis. However, emergency maintenance is performed 24/7 in response to lift stations’ alarms.
  • Closed circuit television inspections are performed on a daily basis to assess the condition of the main lines.


  • 24/7 for main line sanitary sewer overflows.


  • Odor problems
  • Roach Infestation
  • Helping locate private laterals
  • Inspection of new connections