Fifteen Fifty

Luxury multifamily high-rise residential building

Fifteen Fifty is a 40-story luxury apartment building that is home to the first permitted and approved onsite greywater operation in San Francisco’s city history. Related, one of the largest real estate developers in the United States, implemented a pioneering water reuse approach both to comply with San Francisco’s Article 12C water reuse ordinance and to make an important sustainability statement at a moment when California was grappling with its worst drought in 1200 years. The 550-unit residential tower also includes 40,000 square feet of retail space and a 12,000 square foot park.

Operated and maintained by Epic, the onsite water reuse system has the capacity to recycle 7,500 gallons of greywater per day (or over 2.5 million gallons per year) and will save Related more than $90,000 annually on utility costs over the next 10 years.

San Francisco, CA
760,000 square feet
550 apartments
Collection Sources
Rainwater, greywater
System Capacity
7,500 gal/day
End Uses
Toilet flushing, irrigation

Project Partners

Related logo
21,326,500 gallons/year Total annual water demand
2,746,476 gallons/year Demand met by non-potable supply
$90,000+ annual savings Est. annual utility savings over the next 10 years

Sustainability and compliance at the forefront

The system installed at Fifteen Fifty and operated by Epic Cleantec is designed to recycle up to 7,500 gallons of water daily for reuse in the building’s toilet and urinal flushing. The system captures greywater from the unit’s showers, bathroom sinks, and washing machines as well as capturing rainwater from the building roof.

After passing through an advanced purification process consisting of biological treatment, ultrafiltration membranes, and disinfection, the system makes use of real-time monitoring technologies to verify that the recycled treated water meets the highest levels of cleanliness in order to safeguard public health. Potable make-up water is supplied to the treated water tank with an air gap to prevent cross-connection while ensuring continuous water service to the building in the event of routine maintenance or interruptions to the system’s performance. 

We are proud to partner with Epic Cleantec, a leader in water reuse technology and permitting.

Joe Walsh, Senior Vice President

We're thrilled to work with Epic to both lower our operating costs and to make a serious water conservation and sustainability impact.

Phoebe Yee, Executive VP of Design

See how Epic Cleantec has helped other projects

The Landing

San Francisco, CA

The Landing is a multifamily residential building in San Francisco that recycles 3,000 gallons of water per day for use in toilet flushing and irrigation.

601 W. Beech

San Diego, CA

601 W. Beech is a proposed 33-story residential building in San Diego, CA that will reuse roughly 5.5 million gallons of water annually with Epic's OneWater approach.

Park Habitat

San Jose, CA

Park Habitat is a proposed 20-story office space, retail shopping center and museum in San Jose, CA that will reuse nearly 11 million gallons of water per year with Epic Cleantec's blackwater treatment approach.