The Sonoma County Water Agency, located in California about forty miles north of the Golden Gate Bridge, supplies drinking water to 600,000 residents in Sonoma and Marin Counties and provides wastewater and flood control services.
Brown Bag Seminar - Transforming Wastewater to Drinking Water: How Two Agencies Collaborated to Build the World’s Largest Indirect Potable Reuse Project
Adam Hutchinson, Recharge Planning Manager
In the early 2000’s, two Orange County agencies faced some challenges. The Orange County Sanitation District (OCSD) needed to replace on ocean outfall for treated sewer water that would cost millions of dollars. The Orange County Water District’s (OCWD) Water Factory 21, a groundbreaking water recycling facility constructed in the mid-1970s, was nearing the end of its useful life. Rather than focus on its individual needs, the two agencies got together and developed a mutually beneficial project that saved both money and generated tremendous benefits for the citizens of Orange County.
This project is the Groundwater Replenishment System, which currently generates 100 million gallons per day of advanced purified water that is recharged into the Orange County groundwater basin to supplement potable water supplies. By participating in this project, OCSD was able to avoid the need to construct an additional ocean outfall. Further expansion of the GWRS to 130 million gallons per day will result in the recycling of all the available wastewater within OCSD’s service area, further bolstering the reliability of Orange County’s water supplies. In addition to being a reliable source of supply, GWRS water is very pure, with a total dissolved solids (TDS) concentration of 70 mg/L, which greatly assists in reversing a salt imbalance in the basin and improving overall groundwater quality.
Brown Bag Seminar - Implementing California's Sustainable Groundwater Management Act and Other Innovative Water Solutions
WRRC Conference 2017 - Registration Now Open!
The 2017 WRRC Annual Conference, Irrigated Agriculture in Arizona: A Fresh Perspective, will be held on March 28 at the University of Arizona Student Union. Arizona is facing the challenge of water demands outstripping supplies. Do we have enough water to sustain agricultural demands as our population grows, the Colorado River water supply-demand gap increases, and depletion threatens our groundwater aquifers? What are the specific challenges faced by irrigated agriculture in Arizona, and what advances have been made in agricultural technologies to address these challenges? Join us as we discuss and debate our options, including water conservation, changing crop mixes, and alternative water sources. Outside-of-the-box collaborative thinking is essential to pave the way for Arizonans to move into our future water reality.