One Water California


California's water professionals are responding to the State's droughts, 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.

One Water
Topic Sponsor

Sponsor's Featured Articles

US Water Alliance Resources


"We shouldn't judge water by its history, but by its quality." — Paul Sciuto, General Manager, Monterey One Water

"One Water LA is bringing all of us together to think about water holistically. It connects dots, drops and hearts." - Adel Hagekhalil, Asst Director, City of Los Angeles

"I believe the future will see further acceptance of one-water with less delineation between water and wastewater professions." - Juan Guerreiro, Deputy Director, City of San Diego

One Water California Resources

Valentine’s Day Storm Slams California, Pushing Water Agencies to the Edge

March 20, 2019

“Atmospheric River” is a meteorological term coined in the 1990s that’s recently entered common public usage. They are bands of …

Strengthening Utilities through Consolidation: The Financial Impact

March 5, 2019

Today, the US Water Alliance and the UNC Environmental Finance Center are proud to release a new report, Strengthening Utilities …

Declining Flows: Managing the Consequences of Our Success

February 19, 2019

Coverage of asset management topics is supported by MentorAPM AN INTERVIEW WITH WATER EXPERT PAUL BROWN California’s wastewater systems were designed …

Expert Advice: Key Steps to Public Outreach

February 14, 2019

Public outreach programs can reap multiple benefits for utilities and other public agencies, including community support for projects and utility …

2019 EPA Effective Utility Management Workshop Presentations Available

February 13, 2019

  View this post on Instagram   Some of SoCal water’s best & brightest gathered today at the City of …

Video: LA Sanitation’s Advanced Water Purification Demonstration Facility

January 2, 2019

State Water Board Focuses on CECs in Updated Recycled Water Policy

December 11, 2018

State Water Board press release… Key Details Policy for Water Quality Control for Recycled Water was first drafted in 2009 …

Video: City of San Luis Obispo Watershed Protection Program

December 2, 2018

Moulton Niguel Water District Celebrates 50 Years of Water Recycling

August 23, 2018

Moulton Niguel Water District is celebrating its 50th year of operating one of the state’s most successful water recycling programs, which …

Regional San to receive $280.5 million in Proposition 1 funds to expand water recycling in the Sacramento region

August 1, 2018

 The California Water Commission (Commission) recently announced that Regional San will receive $280.5 million—the maximum requested funding amount—in Proposition …

Video: LA Sanitation Explains Projects to Help Get to 50% Local Water by 2025

July 26, 2018

Cool new video from LA Sanitation featuring: City of Los Angeles 2025 local water goal – One Water Los Angeles …

CA-NV AWWA and CWEA Sign Agreement to Work Together on the Future of Operator Certification

June 7, 2018

The California-Nevada Section of the American Water Works Association (CA-NV AWWA) and California Water Environment Association (CWEA) have signed a …