Water Reuse

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Our Water Reuse System
Santa Rosa Regional Water Reuse System is comprised of the Laguna Treatment Plant, Water Reuse Operations and Biosolids Distribution System and serves approximately 230,000 residents in Santa Rosa, Rohnert Park, Cotati, Sebastopol, and unincorporated portions of Sonoma County.

The hub of the Water Reuse System is the Laguna Treatment Plant, which cleans sewage from homes and businesses throughout the region so that it can be reused safely with beneficial outcomes. The Plant recycles approximately 7 billion gallons of wastewater each year. During dry to normal water years, nearly 100% of the tertiary treated recycled water is beneficially reused. 

Our state accredited environmental laboratory, located at the Plant, analyzes drinking water, sewage, and industrial waste to ensure compliance with applicable federal, state and local regulations, public health and protection of the Laguna de Santa Rosa watershed.

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Part 1 - System Overview

Discover how the Santa Rosa Water team manages and maintains a complex water reuse system in order to protect public health and the environment. 

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Part 2 - Steps of Treatment

Learn the steps it takes to clean and treat wastewater to produce recycled water that is beneficially reused for agricultural and urban irrigation, as well as recharging the Geysers steamfields to produce clean and renewable energy for the region.   

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Part 3 - Compliance & Reuse

Explore how Santa Rosa Water works to protect our community's water resources and how your investments in water reuse protects the environment and conserves billions of gallons of drinking water each year. 

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