San Francisco amends health code to enhance water reuse in new buildings

San Francisco County officials are taking significant steps to address the ongoing water crisis by proposing an ordinance that aims to enhance the use of recycled water in new buildings. During a recent government meeting, the Board of Supervisors discussed the ordinance, which lowers the threshold for requiring non-potable water systems in new developments from 250,000 square feet to 100,000 square feet. This change is expected to significantly increase water savings in the city, particularly as California faces another year of extreme drought.

The ordinance mandates that new buildings collect and reuse wastewater for non-potable uses, such as toilet flushing and irrigation. It also requires that certain categories of new buildings treat and reuse black water, which comes from toilets and kitchen sinks. The Public Utilities Commission (PUC) estimates that these changes could double the amount of water savings in new residential buildings, potentially offsetting the water use of approximately 5,500 households daily.

Supervisor Mandelmann, who introduced the legislation, emphasized the urgency of the situation, noting that the Sierra Nevada snowpack, a crucial water source for the city, has dwindled to alarming levels. The ordinance is part of a broader effort to combat the climate emergency and reduce reliance on potable water in San Francisco.

In addition to the new requirements, the ordinance includes provisions for exempting certain affordable housing projects and health care facilities from these mandates, recognizing the unique challenges they face. The PUC is also tasked with delivering a report by next summer on how to develop a more robust supply of recycled water for the city.

The meeting highlighted the collaborative efforts of various city agencies in implementing these water-saving measures, showcasing a commitment to sustainability and environmental responsibility. As San Francisco continues to grapple with water shortages, this ordinance represents a proactive approach to ensuring a more resilient future for the community.