California Water History


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

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

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

We call this perspective One Water. We can provide plenty of water for a robust and healthy California for generations to come.

This page has a wealth of info about California's One Water. Read, share and contribute, we want this to be a resource for all Californians!

Featured video: What is One Water?

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One Water California Posts

OCWD Greenlights Final Phase of Groundwater Replenishment System

September 15, 2019

The Orange County Water District (OCWD; the District) Board of Directors voted to award the contract to construct the 30 …

As Californians Save More Water, Sewers Get Less and That’s a Problem

June 19, 2019

This article was produced and published by the Water Education Foundation as part of its Western Water news. The Foundation …

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

Join the discussion on declining flows at AC19. The session Deep Dive: The Impact of Declining Flows includes 4 case …

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