Regional Sewer Service

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The Orange County Sanitation District (OCSD) is a public agency that provides wastewater collection, treatment, and disposal services for approximately 2.6 million people in central and northwest Orange County. OCSD is a special district that is governed by a Board of Directors consisting of 25 board members appointed from 20 cities, 4 special districts, and 1 representative from the Orange County Board of Supervisors. OCSD has two operating facilities that treat wastewater from residential, commercial and industrial sources.

2018-19 Est. Average Daily Flow of Wastewater Received In MGD (million gallons per day)

Plant No. 1 - 120 MGD
Plant No. 2 - 65 MGD

Total 185 MGD

Ocean Monitoring
OCSD releases treated wastewater into the ocean through a 10-foot diameter offshore pipeline that extends five miles from shore to the point approximately 200 feet below the ocean surface. An emergency standby 6.5-foot diameter pipeline stretches one mile from shore. The one-mile-long diffuser section of the five-mile ocean pipeline contains 503 portholes through which treated wastewater is slowly released. An abundance of marine life has taken up residence along both pipelines. Our award-winning ocean monitoring program monitors and evaluates water quality, sediment quality and sea life from Seal Beach to Corona del Mar.

Biosolids Recycling
OCSD generates about 550 tons per day or about 200,000 tons per year of biosolids. Biosolids are the highly treated, safe, nutrient rich, organic material derived from the wastewater treatment process.

Budget and Rate Information

  • 640 full time authorized staff
  • $321.5 million – current operating and capital improvement budget
  • $339 – annual regional single family sewer fee
  • $4,601 – average connection fee for a single family (3 bedroom) residence
  • $2,451 – estimated cost to collect, treat, and dispose of 1 million gallons of sewage for fiscal year 2019-20.

Energy Production
OCSD generates an average of 8 million kilowatts of energy from burning natural gas and methane gas (biogas), which is a byproduct of the wastewater treatment process. We use this power to run each of the wastewater treatment plants. This year, the net power savings from OCSD generated electricity were $5 million in power that would otherwise have to be purchased from Southern California Edison.

Water Reclamation
OCSD supplies the Orange County Water District with more than 130 million gallons a day of treated wastewater which is then reclaimed and reused for treatment processes, landscaping, injected into the seawater intrusion barrier to protect groundwater, and for the Groundwater Replenishment System (GWRS). The GWRS produces enough new water for nearly 850,000 residents in north and central Orange County.