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North Point Wet Weather Facility


NPF Aerial
Snapshot of NPF 
Built in 1951.

Treats wastewater only during wet weather.

Capacity to treat up to 150 million gallons per day (MGD) of wastewater during rain storms.

Located at the intersection of Bay Street and Embarcadero.

 NPF Fact Sheet July 2019

 Treatment Plant Factsheet

Located near Fisherman's Wharf, the North Point Wet-Weather Facility (NPF) is one of the City's oldest facilities and was the main treatment facility until 1983. As part of the Clean Water Act upgrades, the NPF converted to a wet-weather only facility in San Francisco. This facility provides pretreatment and primary-level treatment with disinfection of wastewater collected in the north part of the City.

The NPF operates when the Southeast Treatment Plant approaches capacity (approx. 250 million gallons per day). As the exclusive wet-weather treatment facility dedicated to reducing the rain’s impact on the City’s system, it is vital that the NPF and associated facilities maintain reliable and safe operation.

The Need for Improvement


Built in 1951, the NPF, North Shore Pump Station and North Point Outfalls are in need of an upgrade to improve the operational reliability of the City’s system. The Sewer System Improvement Program (SSIP) will address this aging infrastructure to ensure the NPF continues to serve San Franciscans wastewater needs.

Planned Improvements

  • Clarifier structural & seismic improvements 
  • Disinfection efficiency upgrade
  • Outfall refurbishment 
  • Redundant wet weather pumps


Project Benefits

  • Update aging equipment and technology
  • Odor control
  • Seismic improvements
  • Improve operating reliability and efficiency
  • Minimizing neighborhood impacts



Last updated: 7/26/2019 9:50:48 AM