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Alternative water sources―recycled wastewater, urban stormwater, and desalinated seawater and brackish water―now provide 2–3% of the state’s urban and farm water supply, and they are growing rapidly. Recycled water use has more than doubled since the late 1980s to 700,000 acre-feet annually. Desalination capacity grew more than fourfold since 2006 to nearly 200,000 acre-feet in 2016. Much of this growth is due to investments by urban water agencies, particularly in Southern California. This trend is expected to continue.