California's water professionals are responding to the State's declining water supplies and erratic weather with a new philosophy called One Water.

Drinking water, wastewater and stormwater traditionally are managed separately. Today, we view them all as one water. Across the State communities are planning to integrate infrastructure across the water cycle. We're breaking down barriers between municipal departments and asking regulators for flexibility so we can build multi-benefit water projects.

CWEA members believe all water has value and should be managed in a sustainable, inclusive and integrated way.

We call this perspective One Water. By implementing the one water philosophy we can provide enough water for a growing California for generations to come.

This page has a wealth of info on One Water in California. Read, share and contribute.

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Co-Digestion Resources

Biogas Symposium Nov 12th Explores How to Fuel California

October 22, 2019

From UC Merced News… The event in Merced is co-hosted by CWEA’s Northern San Joaquin Section, learn more at …

3 Unique Steps Encina Took Designing Their Award-Winning Alternative Energy Co-Digestion Project

June 6, 2018

Located in Carlsbad the Encina Wastewater Authority (EWA) operates an advanced wastewater treatment facility with an average flow of 20 …

Largest Anaerobic Secondary Treatment Pilot Ever Set to Launch in California

December 20, 2017

Can 1+1=3, or maybe even more?  That is the question Stanford and Silicon Valley Clean Water (SVCW) hope to answer …

Survey Finds Ageing Infrastructure and Succession Planning Major Challenges for the Profession

August 29, 2017

In preparation for CWEA’s Annual Conference 2018 next April in Sacramento our Educational Program Team completed an annual survey of …

Dublin San Ramon Awards Contract for New Digester and Grease Receiving Facility

June 29, 2017

On June 20th the Dublin-San Ramon Sanitary District Board of Directors awarded a $7.8 million contract to GSE Construction Company …

Lessons learned on co-digestion operations at three facilities

January 19, 2017

East Bay Municipal Utility District Waste Received: fats, oil and grease (FOG), poultry blood, food waste (e.g., dairy, winery, brewery), …

Santa Rosa Featured in Press-Democrat for New High-Strength Organics Receiving Station

January 14, 2017

The City of Santa Rosa’s new high-strength receiving station received some rave reviews from their local newspaper, the Press-Democrat. Finally, …

Evoqua Named to Support LA Sanitation's Hyperion Water Reclamation Plant

July 13, 2016

Evoqua Water Technologies announced it has been chosen by energy developer DCO Energy, LLC to provide equipment and services for …

University of California Irvine turns garbage into energy

May 31, 2016

Food scraps from University of California Irvine’s commissary used to be sent to landfills where it produced destructive greenhouse gases. …

City of Petaluma Biogas Project Receives $3 Million Grant from California Energy Commission

March 23, 2016

Biomass Magazine reports the California Energy Commission approved a $3 million grant for the design, construction and operation of an …

Co-digestion regulations in California

January 19, 2016

We asked two regulators, Bob Holmes, Environmental Program Manager I with CalRecycle and Johnny Gonzales, Water Resources Control Engineer with …

Self-imposed goals, proposed and existing laws have California communities seeking renewable energy from waste – Sponsored Content

January 19, 2016

By Sean King, JDV Equipment Corporation Waste comes in many forms. But some waste such as manure, fats oils & …