Next Phase of Recycled Water Begins for California
Jul 27, 2023 12:00AM ● By State Water Resources Control Board News ReleaseSACRAMENTO, CA (MPG) - Achieving a major milestone in the state’s efforts to maximize the potential of recycled water, the State Water Resources Control Board announced on July 11, 2023, proposed regulations that would allow for water systems to add wastewater that has been treated to levels meeting or exceeding all drinking water standards to their potable supplies. The process, known as direct potable reuse, will enable systems to generate a climate-resilient water source while reducing the amount of wastewater they release to rivers and the ocean.
This development advances Gov. Newsom’s all-of-the-above Water Supply Strategy, which includes the goal of recycling and reusing at least 800,000 acre-feet of water per year by 2030.
This turning point in California’s history with recycled water, which began in the mid-20th century with the use of recycled water for crops, comes after an expert panel of 12 scientists and engineers evaluated work by the State Water Board’s Division of Drinking Water and determined that the proposed regulations are protective of public health. The regulations are the most advanced in the nation and reinforce California’s position as a leader of innovative solutions to climate challenges. They are now open for public comment and subject to revision based on that input.
Direct potable reuse relies entirely on immediate, multi-barrier treatment that can recycle wastewater to drinking water standards in a matter of hours. This contrasts to the method currently being deployed in major projects launched throughout the state, called indirect potable reuse, which further improves treated wastewater over time through groundwater recharge or dilution with surface water. While no formal direct potable reuse projects can be initiated in California until the regulations are adopted, water agencies in Santa Clara, San Diego and the city of Los Angeles have launched pilot projects in recent years.
The board will consider adoption of the regulations before the end of the year.
The State Water Board’s mission is to preserve, enhance and restore the quality of California’s water resources and drinking water for the protection of the environment, public health, and all beneficial uses, and to ensure proper resource allocation and efficient use for present and future generations.