Donald C. Tillman Water Reclamation Plant


There are many residents in rural areas & cities in Los Angeles County utilizing well water!!! The 2014 Groundwater Sustainability Act may impact them.

Key facts about the Donald C. Tillman Water Reclamation Plant in Van Nuys

  • Began continuous operation in 1985
  • Named after Los Angeles City Engineer Donald C. Tillman 
  • Process
    • Tertiary Treatment Nitrification/Denitrification (NdeN)
      • Removes the load of nitrogen and phosphorus present in the water
      • Microbial process of reducing nitrate and nitrite to gaseous forms of nitrogen, principally nitrous oxide (N 2 O) and nitrogen (N
    • Tertiary
      • Final stage of multi-stage wastewater cleaning process
      • Removes inorganic compounds, bacteria, viruses, and parasites.
    • Disinfection
      • Cleaning to destroy bacteria (usually with a chemical)
    • Dechlorination
      • Removal of chlorine from water
  • Originally designed to treat 40 million gallons of wastewater per day
  • Expansion in 1991 doubled the treatment to 80 million gallons of wastewater per day. (MGD)  
  • Serves the area between Chatsworth and Van Nuys in the San Fernando Valley
  • Japanese Garden was part of the vision of Donald C. Tillman for the Reclamation Plant
    • Six and a half acre garden was designed by world-famous designer
    • Details about the Garden including visits and tours. Link here: Garden's webpage  

The other reclamation plants for Los Angeles are

  • Terminal Island Water Reclamation Plant (TIWRP) 
    • 20 miles south of downtown Los Angeles
    • Built in 1935 
    • Has undergone numerous improvements and upgrades in 1972, 1996, and 2003.
    • Serves the Harbor Area in the City of Los Angeles.
    • Capable to provide high quality tertiary treatment for up to 30 million gallons day
    • 50 wet tons per day of biosolids from TIWRP beneficially reused as soil amendment or composted
    • Six million gallons per day of recycled water used as a potable water replacement to prevent seawater intrusion
    • Virtual Tour: Tillman Virtual Tour (
  • Los Angeles-Glendale Water Reclamation Plant (LAG
    • Serve east San Fernando Valley communities that are both within and outside of the Los Angeles City limits. 
    • The plant’s highly treated wastewater meets and exceeds the water quality standards for recycle water for irrigation and industrial processes. 
    • The water reuse conserves over one billion gallons of potable water per year. 
    • The plant is highly automated and staff can control processes from the onsite control room or at remote locations.
    • The plant processes approximately 20 million gallons of wastewater per day.
    • In 1976 the Los Angeles-Glendale Water Reclamation Plant started operations as the first water reclamation plant in the City.
    • Virtual tour:  LA Glendale Virtual Tour (
  • Hyperion Water Reclamation Plant
    • Los Angeles'  oldest and largest wastewater treatment facility. 
    • Began operating in 1894
    • Multiple expansions and improvements have occurred over the last 100+ years.
    • Hyperion Water Reclamation Plant (
    • From 1894 until 1925, raw sewage was discharged into near-shore ocean waters at Hyperion's future location.
    • Remained in operation until 1950.
    • A second plant was built in 1957 to replace the original plant
    • A third replacement plant was  built in 1990
I'm interested
I disagree with this
This is unverified