The Wastewater Division funds the operation and maintenance of the City's wastewater system, which consists of 9 lift stations, 18 pumps and over 50 miles of sewer mains. The lift stations run in an automatic mode 24 hours per day, 365 days a year. The Wastewater personnel physically inspect and verify proper operation of each lift station every other day. Other responsibilities include routine preventative maintenance, cleaning of half of the 56 miles of wastewater mains using the "hydroflush" machine and high-pressure water (some problem sections get cleaned more often), and cleaning specific sewer laterals that have root problems caused by City trees. Twice a year, each lift station is electrically and mechanically checked out in detail by an outside contractor.

The portion of the City sewer system located to the west of Sepulveda Boulevard flows through the City to the Hyperion Treatment Plant in Los Angeles. The area to the east of Sepulveda Boulevard flows through the system to Los Angeles County Sanitation District No. 5 and on to the District's Carson Treatment Plant.

The employees assigned to the Wastewater Division spend 20% of their time working on the City Storm Drains.