California Water Digest — 2026-07-09

20 item(s) from 9 source(s); 14 flagged (🔔) for your blog keywords.

📰 News & Policy

🔔 DAILY DIGEST, 7/8: Heat dome to broil western US ahead of monsoon; Hotter, drier weather could double water bills in some cities; Army Corps completes Record of Decision for Delta Conveyance Project; Golden mussels plague farms and water districts; and more …

Maven’s Notebook — Wed, 08 Jul 2026 16:00:54 +0000

[cmtoctableofcontents] Several news sources featured in the Daily Digest may limit the number of articles you can access without a subscription. However, gift articles and open-access links are provided when available. For more open access California water news articles, explore the main page at MavensNotebook.com. On the calendar today … WORKSHOP: State Water Resources Control Board beginning at …

🔔 Kern water districts slash support for delta tunnel to a third of 2025 levels

SJV Water — Thu, 09 Jul 2026 00:11:54 +0000

Reading Summary: Kern Water Districts Slash Delta Tunnel Support

Key Facts

Kern County water districts’ participation in Delta Conveyance Project planning funding dropped from 44.96% to 15.77% of their total State Water Project contract obligations
DWR had sought $33 million from Kern districts across 2026–2027 installments; that figure will fall substantially short
Wheeler Ridge-Maricopa Water Storage District cut participation from 32% ($4.1M) to just 1% ($146,000) of its 197,088 acre-feet annual contract
Construction costs are estimated at $20 billion by DWR, but environmental groups put the true cost closer to $50 billion
A Third District Court of Appeals ruling struck down DWR’s 2020 bond validation action, though DWR says it still intends to issue bonds

Who Is Affected

Kern County Water Agency and its 13 agricultural member units, the second-largest SWP contractor bloc
Specific districts: Wheeler Ridge-Maricopa Water Storage District, West Kern Water District, Semitropic Water Storage District
Delta ecosystems and communities: at risk from increased salinity if freshwater flows are diverted
Delta farmers: environmental groups warn of economic harm from saltwater intrusion

Policy/Legal Angle

Third District Court of Appeals ruled DWR’s 2020 bond resolutions were “overly broad,” blocking the bond validation action — though the court did not strip DWR’s underlying construction authority under the Central Valley Project Act
DWR argues existing statutory authority remains intact to plan, finance, and build the tunnel
A draft funding agreement is circulating but has not been finalized; a public participation tally is scheduled for the Kern County Water Agency’s July 30 meeting

Blog Angles

The bond financing question is the real linchpin: If DWR cannot successfully bond for the bulk of the $20B+ construction cost after the appeals court ruling, does the entire project collapse regardless of district participation levels? What’s DWR’s actual backup financing plan?
Information asymmetry as a policy failure: Kern managers say they support the tunnel in concept but can’t get firm operational data to justify costs to farmers. Is DWR’s opacity a negotiating strategy, or a sign the project’s operational parameters genuinely haven’t been worked out?
The “pay-to-play” funding model under stress: The road-toll analogy in the article raises a structural question — if major contractors keep opting into minimal shares, does the planning phase become underfunded to the point of meaningful delay, and who absorbs that risk?

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🔔 Annual PWD Water Quality Report, Showing All Standards Met, Now Available

ACWA — Wed, 08 Jul 2026 19:44:13 +0000

Reading Summary: Annual PWD Water Quality Report

Key Facts

Palmdale Water District (PWD) published its 2025 Consumer Confidence Report (CCR), confirming all federal and state water quality standards were met.
PWD conducted more than 15,000 tests for over 80 regulated contaminants in 2025.
PWD draws from four water sources: State Water Project, Littlerock Dam, groundwater wells, and recycled water.
The CCR is available in English and Spanish at www.palmdalewater.org/ccr or by calling 661-947-4111.
PWD has operated since 1918, serving the Palmdale community in Los Angeles County.

Who Is Affected

Palmdale Water District customers in the Palmdale area (Antelope Valley, LA County).
California State Water Resources Control Board, Division of Drinking Water — the regulatory body requiring the annual CCR by July 1.

Policy/Legal Angle

CCR is mandated by the California State Water Resources Control Board and must be filed by July 1 annually.
Report distinguishes between Primary standards (health-based) and Secondary standards (aesthetic-based), per state/federal drinking water framework.

Blog Angles

How does PWD’s reliance on the State Water Project — vulnerable to drought and Delta policy shifts — affect long-term water quality and supply security?
With recycled water listed as one of four sources, how much of Palmdale’s supply does it represent, and how is it regulated under California’s expanding recycled water rules?
What specific contaminants came closest to exceeding limits among the 80+ tested — and what does that reveal about Antelope Valley’s groundwater quality challenges?

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California’s Water Gamble - Sierra Club

Google News — CA water — Wed, 08 Jul 2026 16:04:32 GMT

California’s Water Gamble Sierra Club

🔔 Patterson illegally denied 719-home development over groundwater dispute, judge rules - CBS News

Google News — groundwater/SGMA — Thu, 09 Jul 2026 01:30:00 GMT

Patterson illegally denied 719-home development over groundwater dispute, judge rules CBS News

FARM: Golden mussels plague farms and water districts - Imperial Valley Press Online

Google News — Bay-Delta — Thu, 09 Jul 2026 07:00:00 GMT

FARM: Golden mussels plague farms and water districts Imperial Valley Press Online

🔔 Native American tribes came together to secure water rights. Four states are stalling the deal. - Colorado Newsline

Google News — Colorado River — Fri, 03 Jul 2026 10:05:14 GMT

Native American tribes came together to secure water rights. Four states are stalling the deal. Colorado Newsline

State Water Project Shifts Into Summer Operations to Support California’s Water Supply and Environment - California Department of Water Resources (.gov)

Google News — state agencies — Thu, 02 Jul 2026 21:15:28 GMT

State Water Project Shifts Into Summer Operations to Support California’s Water Supply and Environment California Department of Water Resources (.gov)

🔔 AG ALERT: Golden mussels plague farms and water districts

Maven’s Notebook — Wed, 08 Jul 2026 15:58:49 +0000

By Caleb Hampton The spread of golden mussels in California has alarmed farmers this year as the invasive species established itself in waterways across much of the state. In the Sacramento-San Joaquin Delta, the freshwater mollusks began obstructing irrigation systems that sustain billions of dollars’ worth of tree nuts, winegrapes, tomatoes and other crops. “It’s a nightmare,” said Trey Steinhar…

CDFW Releases Amendments on Invasive Mussel Regulations

ACWA — Wed, 08 Jul 2026 17:46:15 +0000

Reading Summary: CDFW Releases Amendments on Invasive Mussel Regulations

Key Facts

The California Department of Fish and Wildlife (CDFW) has proposed amendments to expand existing invasive species regulations to cover all invasive mussel species, including golden mussels
Golden mussels can thrive in a wider range of water conditions than quagga or zebra mussels, making them more difficult to control
Golden mussels attach to infrastructure in dense clusters, clogging pipelines, pumps, filters, hydropower facilities, and agricultural operations
A public comment period closes August 18, when CDFW will host a virtual public hearing
Unaddressed spread will result in significant costs ultimately borne by ratepayers

Who Is Affected

CDFW (lead regulatory agency)
ACWA (submitting comments and attending hearing)
Water utilities and ratepayers statewide
Agricultural operations and hydropower facilities
Aquatic ecosystems across California

Policy/Legal Angle

Amendments are designed to align with existing Fish and Game Code
Existing regulations previously covered quagga and zebra mussels but apparently did not explicitly include golden mussels, necessitating the expansion

Blog Angles

How did golden mussels arrive in California, and how far have they already spread? The article flags the threat but doesn’t address current distribution — a critical gap for readers assessing urgency
What will this actually cost ratepayers? The article mentions cost burden without any estimates — an opportunity to dig into economic impact studies or compare costs from other states or countries where golden mussels are established
Are CDFW’s proposed regulatory tools sufficient? Given that golden mussels are harder to control than quagga/zebra mussels, do the existing regulatory frameworks being extended actually match the scale of the new threat?

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Newsom looks to lock in his water agenda - Politico

Google News — CA water — Tue, 07 Jul 2026 23:30:00 GMT

Newsom looks to lock in his water agenda Politico

🔔 DWR: Detecting the Delta’s inhabitants through their DNA fingerprint

Maven’s Notebook — Wed, 08 Jul 2026 15:58:08 +0000

From the Department of Water Resources: Finding the Delta’s most elusive residents means digging deep down into the microscopic traces they leave behind. DWR scientists are doing just that by tapping into DNA, the cellular material that contains the building blocks of life and is found in all organisms. Every living organism sheds environmental DNA (eDNA) into its surroundings through skin cells, …

🔔 July 2026 Priority Issues Update Now Available

ACWA — Wed, 08 Jul 2026 16:02:24 +0000

Reading Summary: July 2026 Priority Issues Update (ACWA)

Key Facts

ACWA’s July 2026 Priority Issues Update is available exclusively to members and covers sponsored bills, golden mussels, the Advanced Clean Fleets regulation, and federal funding.
Gov. Newsom appointed Jared Blumenfeld (former CA EPA Secretary) to the State Water Resources Control Board and Thomas Gibson as Director of the Department of Water Resources (appointed June 29).
Sonoma Water General Manager Grant Davis announced retirement effective August 25, 2026, after nearly 20 years.
Tuolumne Utilities District broke ground on the Sierra Pines Regional Water Treatment Facility on June 26.
ACWA submitted letters to the U.S. Army Corps of Engineers, U.S. EPA (contact: Thomas Lombardi), the California Air Resources Board, and legislative budget leadership on multiple regulatory issues.

Who Is Affected

Agencies: State Water Resources Control Board, CA Air Resources Board, Dept. of Water Resources, U.S. EPA, U.S. Army Corps of Engineers, CA Dept. of Fish and Wildlife
Water Districts: Palmdale Water District, San Gorgonio Pass Water Agency, Cucamonga Valley Water District, Rowland Water District, Crescenta Valley Water District, Walnut Valley Water District, Sonoma Water, Tuolumne Utilities District
Communities: Palmdale, Beaumont, Rancho Cucamonga, Rowland Heights, La Crescenta, Walnut, San Juan Capistrano, Tuolumne County

Policy/Legal Angle

AB 1096 and the Control of Lead and Copper Regulation (State Water Resources Control Board)
Advanced Clean Fleets Regulation amendments and additional 15-day changes (CA Air Resources Board)
Pre-Rulemaking on Carbon Capture Utilization and Storage/Carbon Dioxide Removal Program (CA Air Resources Board)
Post-Wildfire Resources guidance from the Division of Drinking Water (State Water Resources Control Board)
River Forecast funding issues addressed in letters to legislative budget chairs Laird, Gabriel, Gómez Reyes, and Bennett

Blog Angles

Leadership Reshaping Water Governance: With Blumenfeld at the SWRCB and Gibson at DWR simultaneously, what policy priorities might shift — particularly on Delta issues, water rights, or drought planning — and how is ACWA positioning itself in response?
Golden Mussels as an Emerging Threat: The update flags golden mussels as a priority issue — what is the current spread risk in California waterways, and what regulatory or infrastructure responses are water agencies actually preparing for?
Advanced Clean Fleets Burden on Water Agencies: ACWA is actively engaging CARB on fleet regulation amendments — how are smaller or rural water districts expected to comply with vehicle electrification mandates, and are there cost or timeline concerns specific to the water sector?

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🔔 California tries again to fix permitting delays for groundwater recharge - Agri-Pulse

Google News — CA water — Wed, 08 Jul 2026 10:03:00 GMT

California tries again to fix permitting delays for groundwater recharge Agri-Pulse

🔔 PRESS RELEASE: U.S. Army Corps of Engineers completes Record of Decision for Delta Conveyance Project

Maven’s Notebook — Wed, 08 Jul 2026 15:57:47 +0000

From the US Army Corps of Engineers: The U.S. Army Corps of Engineers, Sacramento District, finalized its Record of Decision (ROD) for the proposed Delta Conveyance Project, completing the agency’s programmatic environmental review under the National Environmental Policy Act. The decision concludes one phase of the federal review process and allows USACE to begin evaluating future permit applicati…

California Commercial Fishing at a Crossroads: Lori French Shares the Challenges Facing Morro Bay’s Fleet - AgNet West

Google News — CA water — Tue, 07 Jul 2026 14:00:00 GMT

California Commercial Fishing at a Crossroads: Lori French Shares the Challenges Facing Morro Bay’s Fleet AgNet West

🔔 NOTEBOOK FEATURE: Delta Independent Science Board examines Nature-Based Solutions for climate, water and habitat goals

Maven’s Notebook — Wed, 08 Jul 2026 15:57:21 +0000

State agencies highlight nature-based solutions for the Delta Nature-based solutions use natural systems and working landscapes to reduce greenhouse gas emissions, store carbon and build resilience to climate impacts. California has made those approaches a key part of its climate strategy, with agricultural lands and Delta wetland restoration playing important roles because both can increase carbo…

🔔 COURTHOUSE NEWS: Climate change could redraw California wine country maps

Maven’s Notebook — Wed, 08 Jul 2026 15:56:58 +0000

Researchers warn climate change could reduce wine production in California’s iconic wine regions, including Napa and Sonoma, while counties such as Mendocino and Monterey may become better suited for vineyards by the end of the century. By Quinn Welsch, Courthouse News Service Napa and Sonoma counties have defined American wine since the 19th century, but the delicate environment that helped make …