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California Indirect and Direct Potable Water Reuse Summaries

California uses treated municipal wastewater as a source water for drinking water through indirect potable reuse and direct potable reuse.

Indirect potable reuse uses an environmental buffer before the water is treated at a drinking water treatment plant. Find more information about CA’s indirect potable reuse here.
Direct potable reuse involves the treatment and distribution of water without an environmental buffer. Find the summary of CA’s water reuse regulation for direct potable reuse here.