California Water Views

On January 9, 2026, Governor Newsom announced his 2026-2027 $348.9 billion budget proposal. Contrary to his 2025 proposal, this proposal includes a deficit. However, this proposal’s deficit is only $2.3 billion, substantially less than in 2023 and 2024, and the press release calls this projected deficit both “modest” and “solved”. The budget proposal’s deficit projection stands in contrast with the Legislative Analyst’s Office November 19, 2025 report, which predicted an $18 billion shortfall.

The budget site includes a full combined summary, summaries of ...

On January 21, 2026, the California Department of Water Resources (DWR) published its Best Management Practices of the Sustainable Management of Groundwater – Land Subsidence (Subsidence BMPs). The press release details the importance of addressing subsidence, which costs Californians hundreds of millions of dollars annually, largely through damaging public infrastructure and reducing water deliveries.

Background

Subsidence is the process of land sinking. In the water context, it is generally caused by removing groundwater quicker than it is replenished, which ...

On January 15, 2026, the U.S. Environmental Protection Agency (EPA) published a proposed rule titled “Updating the Water Quality Certification Regulations” (Proposed Rule). This rule implements changes to the Clean Water Act’s (CWA) Section 401 permitting process. EPA intends to narrow the scope of the States’ certification authority to the application of solely water quality-related conditions which may be applied only to the discharge, not the project as a whole.

This change, among others in the Proposed Rule, will significantly reduce the ability of States or ...

On December 11, 2025, Representative Adam Gray (D-CA-13) and Representative Jim Costa (D-CA-21) announced a legislative package entitled the End California Water Crisis Package. The bills “aim to expand California’s water storage capacity by providing funding and technical support to both develop and maintain water infrastructure projects.” They seek to accomplish their goals by “authoriz[ing] additional California water storage projects, eas[ing] permitting restrictions, and creat[ing] enforceable timelines for environmental review processes.”

Both ...

On November 17, 2025, the Environmental Protection Agency (EPA) and Army Corps of Engineers (Corps) (collectively, Agencies) announced a proposed rule (Proposed Rule) to revise the regulatory definition of “waters of the United States” (WOTUS). The Proposed Rule was published in the Federal Register on November 20, 2025, starting the 45-day public comment period, which closes on January 5, 2026.

This Proposed Rule represents the latest iteration of the WOTUS definition, which has seen five finalized rules and one U.S. Supreme Court decision since 2015.

Background

As the ...

As announced via press release on November 10, 2025 and then officially in the Federal Register on November 13, 2025, the Environmental Protection Agency (EPA) proposed rolling back certain requirements related to reporting PFAS that were issued under President Biden’s EPA. The action aligns with the general approach EPA has taken under President Trump, which includes rolling back other PFAS regulatory action.

Background

The initial regulation, which was issued by EPA under the Toxic Substances Control Act (TSCA), was finalized at the end of 2023, as we discussed here. As ...

On October 23, 2025, the California State Water Resources Control Board (State Water Board) announced a new online platform – the Water Accounting, Tracking, and Reporting System (CalWATRS). CalWATRS replaces the Electronic Water Rights Information System (eWRIMS) platform.

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This week marks California’s ninth annual Water Professionals Appreciation Week, a dedicated time to celebrate the critical contributions of water professionals and local public water agencies across the state. The event, established in 2017, pays tribute to the individuals who tirelessly ensure safe, reliable water and wastewater services for our communities.

At Nossaman, we appreciate the highly skilled professionals—operators, technicians, engineers and customer service representatives—who work around the clock to guarantee access to drinking water ...

Per- and polyfluoroalkyl substances (PFAS) are the contaminant of concern across the water industry. The Biden administration was active in its approach to PFAS regulation, announcing drinking water maximum contaminant levels, new Superfund regulation, new listings of PFAS as hazardous constituents and more.  Now that we are more than six months into President Trump’s second term, his administration’s approach and the reactions thereto are crystalizing. Determining the proper approach for regulating is significant and timely, as new data shows the ubiquity of PFAS, with at least 73 million Americans drinking water containing PFAS. ... 

The intricacies of the Waters of the U.S. (WOTUS) definition continue to evolve, especially with recent changes initiated under the Trump administration and landmark clarifications from the Supreme Court's Sackett v. EPA decision.

In Nossaman’s California Water Views – 2025 Outlook, we dive into the latest developments, providing an overview of significant regulatory changes underway to the Clean Water Act (CWA) Section 404 permitting processes. We discuss various Executive Orders that are expected to have implications for the implementation of the CWA, insights into ...