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

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 …

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 …

One Water Roundtable Video: How do we afford water system upgrades?

January 24, 2018

CWEA Roundtable: How can we afford water system upgrades? A water Q&A with three of California’s top clean water leaders …

One Water Spotlight: Santa Clara Valley Water District

January 13, 2018

Flush with Possibilities With a new water purification plant, Santa Clara Valley Water District is driving water reuse to advance …

Even If You’re Not an Environmentalist, Potable Reuse is Best Choice for Safe, Affordable Drinking Water

November 18, 2017

An Interview with Garry Brown,  DPR Advisory Group Chair The State’s recent steps toward direct potable reuse (DPR) might seem …

Comment Letter – Draft Report to the Legislature on the Feasibility of Developing Uniform Water Recycling Criteria for Direct Potable Reuse

October 20, 2017

Below is the joint comment letter CWEA and CA NV AWWA have submitted focused on the operator certification piece of the …

Announcing the Water Equity Clearinghouse

September 29, 2017

From US Water Alliance We are pleased to announce the release of the Water Equity Clearinghouse, an online database that showcases …