DAILY DIGEST, 2/3: Boosting climate resilience in the Delta’s mountain headwaters; Solano agencies, others continue push for balanced Bay-Delta plan update; Central Valley ag confronts the weight of water policies; Arizona faces outsized burden if Colorado River states miss February deadline; and more …


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On the calendar today …

  • MEETING: State Water Resources Control Board beginning at 9:00am.  Agenda items include current hydrologic conditions and response; consideration of two case-by-case exceptions to the Policy for Maintaining Instream Flows in Northern California Coastal Streams; and Consideration of a proposed Resolution to adopt the Clean Water Act Section 303(d) List of Impaired Waters portion of the 2026 California Integrated Report.  Click here for the full agenda and remote access instructions.

In California water news today …

Boosting climate resilience in the Delta’s mountain headwaters

Headwaters of Bear River, which is about 73 miles long and flows from Emigrant Gap to the Feather River. All images courtesy of the Sierra Streams Institute unless otherwise credited.

“Many of the great rivers that meet in the Sacramento-San Joaquin Delta begin high in the Sierra Nevada, where summer snowmelt feeds streams that start as trickles and then gush downslope toward the sea.  “These tiny, little streams add up to the Delta, “says Jeffrey Lauder, a forest ecologist and Executive Director of the Sierra Streams Institute, a Nevada City-based nonprofit that focuses on watersheds in the Northern Sierra Nevada. But, despite their vital role in the Delta’s water supply, the future of mountain streams under climate change is little known.  A new project, led by the Sierra Streams Institute and funded by the Delta Stewardship Council’s Delta Science Program, will gauge likely changes in mountain headwaters to the Delta as the world warms. In keeping with the Delta Science Program’s emphasis on co-producing knowledge with tribes, this project will also integrate Western science with Indigenous knowledge. … ”  Read more from Robin Meadows at Maven’s Notebook.

Solano agencies, others continue push for balanced Bay-Delta plan update

“The salmon recovery effort on Putah Creek was highlighted as an early example of a Healthy Rivers and Landscapes Program success story at the recent California State Water Resources Control Board hearings.  The control board is updating the Bay-Delta Water Quality Control Plan, with Solano County agencies joining the State Water Contractors and a host of others in favoring the Healthy Rivers and Landscapes option.  “The Healthy Rivers and Landscapes program combines two priorities that Californians care deeply about: environmental health and a reliable, affordable water supply,” Jennifer Pierre, general manager of the State Water Contractors, said in a statement. … ”  Read more from the Daily Republic.

DWR: A look at Delta Conveyance Project operations

“The Delta Conveyance Project will allow California to safely maximize water deliveries to recover water lost due to climate change, sea level rise and earthquakes.  This modernized infrastructure creates essential operational flexibility to safely take advantage of excess water created by extreme weather events, under the right conditions.  A new fact sheet describes how the project would be operated. … While California experienced significant rainfall early in the water year, conceptual operations show the project would only have started operating in late December, with diversions still prioritized at the existing south Delta intakes, only capturing excess flow on top of permitted south Delta diversions. … ”  Read the full article from DWR.

Historically warm, dry January erases snowpack gains in Sierra Nevada

“After some much-needed holiday storm carryover kicked off the year in Lake Tahoe and the Sierra Nevada, the region slogged through its own version of dry January; now, there’s a tough road ahead to recover from a mostly snow-free start to 2026.  “A dry January, which is historically the wettest month of the year in California, has now eroded the gains made at the start of the year and forecasts currently show no major precipitation in the next two weeks,” California Department of Weather Resources spokesperson Jason Ince wrote in a Jan. 30 news release.  The first month of the year certainly left the area warmer and drier than usual, weather officials confirmed. Even worse, they also corroborated the notion that there isn’t much in the offing to kick off February either. … ”  Read more from SF Gate.

EXPLORE MORE COVERAGE:

Central Valley ag confronts the weight of water policies

“The water policies influencing productive farmland in the Central Valley have been years in the making. Among the most frequently cited markers of what lies ahead is the Public Policy Institute of California’s projection that implementation of the Sustainable Groundwater Management Act could lead to the fallowing, retirement, or repurposing of between 500,000-acres and 1 million-acres of farmland in the San Joaquin Valley by 2040.  Once a distant forecast, those numbers are now moving closer to reality as groundwater sustainability plans shift from planning to enforcement. According to Aaron Fukuda, chief executive officer of the Mid-Kaweah Groundwater Sustainability Agency and the Tulare Irrigation District, farming under SGMA has already become the “new norm” for many growers, with implementation in the Kaweah Subbasin beginning in 2022. … ”  Read more from the Valley Ag Voice.

Groundwater depletion at crisis levels across American West

“Groundwater levels are the level of the water table below underground aquifers and are crucial to water security. In dry states like California, 40 percent of water is from groundwater; during droughts, this rises to around 60 percent. Due to this dependence and the declining water levels of surface reservoirs, such as Lake Mead (currently at 19 percent capacity), groundwater in the American West is being overexploited, particularly in regions like the San Joaquin Valley in California’s Central Valley and the Ogallala Aquifer beneath the Great Plains in the Midwest. … ”  Continue reading from the Environmental Magazine.

Western U.S. cities open wallets in quest for water

“Little more than two months ago, on an unusually rainy November evening, the Queen Creek Town Council staked claim to the city’s future.  Queen Creek, located in central Arizona southeast of Phoenix, was founded in 1989 but is already home to some 88,000 people. In a unanimous vote, the council approved a $244 million deal to acquire 12,000 acre-feet of water annually for the next century from the Harquahala groundwater basin, some 90 miles away. (An acre-foot is enough water for about three households per year.)  The purchase, which does not include interest payments or the cost of the infrastructure to pump and move the water, represents 100 years of the young city’s current water demand and gives the fast-growing area access to a water source that will not be subject to Colorado River restrictions, a valuable asset in a state where many cities rely on the beleaguered and shrinking river for a portion of their water. … The water-supply discussions in the Phoenix suburbs are echoed in council chambers across the American West. In a drying climate with growing populations and thirsty economies, a secure water supply is an urgent matter. Conservation is often the cheapest option. But cities, like financial planners, also want to diversify their water portfolios. … ”  Read the full article from the Circle of Blue.

Western senators propose wastewater program renewal

“U.S. Sen. Catherine Cortez Masto, D-Nevada, has co-introduced bipartisan legislation to extend a federal $450 million water recycling grant for Western states until 2032.  The federal grant, signed by former President Joe Biden in 2021, has already allocated roughly $308 million on water recycling projects in Colorado River states. Without its renewal, the remaining nearly $150 million could go unspent.  “There is still $150 million in unused funds, and the authorization for the grant program is set to sunset this year,” the Office of Sen. Cortez Masto wrote, answering The Center Square’s questions by email. “Without the passage of her bipartisan Large-Scale Water Recycling Reauthorization Act, those funds – which have already been appropriated – face an uncertain future.” … ”  Read more from The Center Square.

In regional water news and commentary today …

NORTH COAST

Clearlake expands sewage spill impact area, leaving more residents without water

“Three weeks after 2.9 million gallons of raw sewage spilled into a Clearlake neighborhood, more residents have been told to not use their water after city and county officials expanded the original impact area, saying contaminated groundwater may have traveled farther than first believed.  On Friday, Jan. 30, officials said that contaminated groundwater may have traveled more than anticipated when the spill occurred and that residents who rely on private wells drawing from a shallow aquifer could be affected.  The spill is now affecting 164 homes across 549 acres.  The expansion is intended to ensure that all areas that could potentially be affected receive appropriate guidance, testing and support, Clearlake officials said in a press release. … ”  Read more from the Santa Rosa Press Democrat.

SIERRA NEVADA

Lake Tahoe snowpack at 60%, other areas of Nevada dealing with record lows

“As he does every year, hydrologist Jeff Anderson would make his way to Slide Mountain on Monday to see how deep the snow is and how much water is in it.  “What we found today is the snow is 58 inches deep, contains 19.8 inches of water content,” Anderson explained. “And that is 83% of median.”  The total snowpack of the Lake Tahoe basin is currently at 60%, but elsewhere across the state, things are more dire. The Northern Great Basin is currently at just 26%, and the Owyhee Basin is at 24%. Both of those numbers represent the lowest snowpacks on record. … ”  Read more from Channel 8.

Illegal boat launch stopped at Lake Tahoe

“The Tahoe Regional Planning Agency (TRPA) Governing Board approved a violation settlement and $5,000 penalty last week against two boaters for attempting to illegally launch a vessel on Lake Tahoe’s West Shore, the agency announced today.  The boaters attempted to launch in July 2025 at Obexer’s Marina near Homewood, Calif., with a wire inspection seal that had been broken during an earlier launch at Folsom Lake and then reattached to deceive marina staff. Staff at Obexer’s Marina noticed the tampered seal, refused to allow the boat to launch, and notified TRPA aquatic invasive species managers. … ”  Read more from the Tahoe Daily Tribune.

Placer County considers new rules to cut single-use plastics in Tahoe Basin

“Placer County leaders are weighing a potential step toward a cleaner Lake Tahoe.  At its meeting Tuesday, the Placer County Board of Supervisors will consider new rules aimed at reducing single-use plastic waste in the eastern portion of the county, which includes parts of the Tahoe Basin. If approved, the changes would bring Placer County in line with existing plastic-reduction ordinances already in place in Truckee and South Lake Tahoe.  The proposed rules would ban the sale of single-use plastic water bottles and expanded polystyrene, commonly known as Styrofoam, food containers. Supporters say the move could significantly cut down on litter that threatens Tahoe’s water quality, wildlife, and iconic views. … ”  Read more from Channel 4.

Nevada Irrigation District snow survey shows snowpack at 47% of average, reservoir storage remains strong

“Nevada Irrigation District’s (NID) first snow survey of the year found the mountain snowpack well below average, even as District reservoirs remain near full following strong early-season storms.  Surveyors measured only 47 percent of the historical snowpack across NID’s five snow courses. The average snow water content was 9.5 inches. By comparison, the historical average water content is 20.2 inches.  Despite the low snowpack, reservoir storage remains well above average, largely due to heavy precipitation in December. … ”  Read more from YubaNet.

BAY AREA

Vallejo has completed 98 percent of water meter upgrades

“The City of Vallejo announced on Monday that is has completed 98 percent of the installation of 38,000 water meter upgrades at residences and businesses throughout Vallejo.  Work is expected to be completed this spring as the upgraded meters will digitally transmit water usage data for billing, rather than meter readers being sent to homes and businesses. Upgraded meters will securely and privately relay customers’ water usage data to existing cell towers every 15 minutes, allowing customers timely monitoring of their water use.  “We are very excited to update and modernize Vallejo’s water metering infrastructure so that consumers can take control of managing their water usage and water bill,” said Beth Schoenberger, Vallejo Water Director said in a news release. … ”  Read more from the Vallejo Times-Herald.

SAN JOAQUIN VALLEY

Water deal gone dry: KC Water Agency owed $14 Million

“A water dispute involving a community more than 200 miles away could have real financial consequences for Kern County residents, with a $14 million debt at the center of the controversy.  For more than two decades, the Kern County Water Agency has supplied water to Diablo Grande, a 600-home development in Stanislaus County, through a complex state water exchange. According to the Kern County Water Agency, the Western Hills Water District in Stanislaus County stopped paying for those deliveries in 2019, and the unpaid bill has now grown to about $14 million. … ”  Read more from Channel 23.

SOUTHERN CALIFORNIA

Possible record highs in SoCal this week as Santa Ana winds return

“A mid-week warming trend kicks off Tuesday, with temperatures expected to reach the low 90s in some valleys. SoCal beaches will see temperatures from 73 to 79 degrees, with periods of low clouds in the morning. The inland coast and downtown L.A. will see highs of between 82 and 85 degrees. … ”  Read more from the LAist.

Big decisions are in store for small Altadena water companies and their customers after Eaton Fire

“Water companies that serve much of Altadena are expected to hold public meetings this week to discuss how they’ll rebuild and stay in business after the Eaton Fire reduced many of their customers’ homes to ash. Two out of the three mutual water companies in the area are holding public meetings this week to discuss raising rates.  Last year’s fires not only destroyed homes and businesses, but also critical infrastructure, such as water delivery systems. Rebuilding that infrastructure is particularly challenging in unincorporated areas such as Altadena, which is primarily served by three tiny, private water companies — Las Flores , Rubio Cañon and Lincoln Avenue water companies. … ”  Read more from the LAist.

Satellite imagery shows beach widening in Southern California driven by human activity

“While many of California’s beaches have narrowed over time due to coastal erosion, new research from USGS and the University of California, Irvine shows that some beaches consistently defy this trend. In fact, the amount of beach growth outpaces the erosion in southern California—thanks largely to human intervention.  While many of California’s beaches have narrowed over time due to coastal erosion, new research from USGS and the University of California, Irvine shows that some beaches consistently defy this trend. In fact, the amount of beach growth outpaces the erosion in southern California—thanks largely to human intervention. … ”  Read more from the USGS.

Why draining Mojave’s aquifer is a really bad idea

“A private company has spent decades attempting to build a pipeline that would remove groundwater from the fragile California desert to export and sell for profit. Despite having its water mining permit invalidated in 2022 after a federal court lawsuit, Cadiz Inc. is trying again to access the Mojave Desert’s aquifer.  NPCA stands firm with local communities and Tribes in once again opposing any permitting for this destructive groundwater mining project, which scientific studies show would deplete the Mojave Desert’s aquifer at the expense of wildlife, people and national parks.  Here are frequently asked questions about the project. … ”  Read more from the National Parks Conservation Association.

SAN DIEGO

While Punxsutawney Phil predicts winter, San Diego County warms up

“Punxsutawney Phil may be calling for six more weeks of winter, but winter is nowhere to be found in San Diego County. Warmer weather is expected Tuesday through Thursday, with periods of weak to locally moderate Santa Ana winds, according to the National Weather Service. … ”  Read more from the Times of San Diego.

San Diego County to study AI data center impacts before approving power-hungry facilities

“Artificial intelligence data centers can take as much power as a small to medium-sized city, or close to 100,000 homes.  Now, local leaders want to make sure San Diego County is ready before AI data centers move in.  There are now more than 4,000 data centers nationwide, with California among the states with the most. Experts warn the rapid growth could drive up electric bills if costs are passed on to customers.  At a Wednesday meeting, the county Board of Supervisors will discuss how large AI data centers could impact local infrastructure, water use, and who ultimately pays for new power demands. … ”  Read more from Channel 10.

Board of Supervisors vote in favor of $8.75 million for Tijuana River crisis

“On Wednesday, the San Diego Board of Supervisors unanimously advanced $8.75 million in funding to address the Tijuana River sewage crisis. The funding package devotes $2.5 million to infrastructure upgrades, $2.25 million to a public health study, and $4 million in short-term relief efforts.  San Diego County Supervisors Terra Lawson-Remer and Paloma Aguirre first announced a  funding proposal for $4.75 million to address the state of emergency in the river valley caused by sewage overflow on Jan. 22. The final funding package devotes an additional $4 million in county reserve funds to provide air purifiers for residents impacted by poor air quality.  The board also reaffirmed the countywide state of emergency declaration related to sewage flows from Mexico that pollute county waterways, beaches, and air. This declaration, first issued in June 2023, must be reviewed every 60 days, per state law. … ”  Read more from the UCSD Guardian.

Along the Colorado River …

Arizona faces outsized burden if Colorado River states miss February deadline

Colorado River by David Denicolo

“Not everyone with a stake in the future of Arizona’s access to Colorado River water feels as “cautiously optimistic” about water usage negotiations among the seven Colorado River Basin states.  The governors of six of the seven states, including Arizona Gov. Katie Hobbs, said they were cautiously optimistic that the states would reach a deal after they met in Washington D.C. last week to hash things out, in a meeting called by U.S. Secretary of the Interior Doug Burgum.  Reaching a water usage agreement is vital to the basin states as the Colorado River’s water supply continues to decline, as it has done for the past 25 years due to a persistent drought spurred on by climate change.  Burgum called the meeting at Hobbs’ request after the states missed a Nov. 11 deadline to reach an agreement and with a new Feb. 14 deadline rapidly approaching.  Prior to the meeting, the two basins were at an impasse, and it’s still unclear if the meeting changed that. … ”  Continue reading from the Arizona Mirror.

Colorado River negotiations in murky waters after historic governors gathering in DC

“Gov. Jared Polis and Becky Mitchell, Colorado’s top Colorado River negotiator, returned from the U.S. capital with no official agreements about how to manage the water supply for 40 million people.  Colorado River states offered conflicting reports about the status of the negotiations over how to manage the Colorado River’s main reservoirs starting this fall. The Department of the Interior called the seven basin state governors to a historic meeting Friday in Washington to try to push the states closer to a joint plan by Feb. 14.  Coming out of Washington, some officials said no firm agreements had been reached on anything. Arizona’s top negotiators said upstream states, like Colorado, seemed to be more willing to budge on long-held positions, like mandatory conservation. Colorado sources close to the negotiations said six of the seven states are at a point where they could possibly agree on a way forward, with Arizona as an outlier. … ”  Read more from the Colorado Sun.

Could Arizona, other Colorado River Basin states sign short-term deal?

“Time is running out for a new deal on how to allocate water from the Colorado River. Now, Arizona’s negotiator is saying a bridge deal could be on the table.  The current agreement expires at the end of the year, and an agreement needs to be in place by the fall. But instead of a 20-year compact, the states could reach a short-term deal, said Tom Buschatzke, Arizona Department of Water Resources director.  “First of all, no one can tell you what the Colorado is going to look like in five years, whether that’s the fifth year of a five-year deal or the fifth year of a 25-year deal, right?” he said Monday. … ”  Read more from Channel 15.

EXPLORE MORE COVERAGE:

Arizona: Three exciting desal concepts

“The Arizona Water Infrastructure Finance Authority (WIFA) has welcomed proposals from project teams on diverse strategies like ocean desalination, surface water importation, wastewater reclamation, and novel technologies to develop new renewable sources that bolster the state’s long-term water security amid growing shortages. The effort by WIFA come as the state faces additional cutbacks in its Colorado River supplies and its existing sources of groundwater are stressed to the limit.  Persistent Colorado River shortages since the 2000s have prompted Arizona stakeholders, including the Central Arizona Project (CAP) and ADWR, to evaluate the Yuma Desalting Plant operation as a supply augmentation tool. Legislative proposals like Sen. Martha McSally’s 2020 bill sought to mandate repairs and restart, though dismissed as unfeasible due to $160-450 million in upgrades plus $25-40 million annual operations. … ”  Read more from Coyote Gulch.

Gilbert proposes third consecutive water rate hike amid infrastructure concerns

“Gilbert officials met with dozens of residents Monday to discuss a proposed 25% increase in water and waste service rates, marking what could be the third consecutive year of utility hikes for the East Valley community.  What we know:  The open house was the first of two scheduled meetings before the Town Council votes on the proposal Feb. 17. If approved, the new rates would follow a 50% water rate increase that took effect last year.  Officials say the adjustments are necessary to fund critical infrastructure and secure long-term water supplies as Colorado River allocations continue to decline. … ” Read more from Channel 10.

Nevada: Geothermal industry’s groundwater ‘loophole’ scrutinized

“Nevada lawmakers are working to revive a bill that would require state water regulators to take a closer look at how geothermal operations impact groundwater during the permitting process.  Farmers and hard-rock mining companies that pump groundwater are required to apply for permits under Nevada law, but current statutory framework exempts some industrial groundwater users from the permit process as long as they return the water they pump back into the ground.  Assembly Bill 109 would close a “loophole” that allows developers to pump water without a permit from the state engineer if the operation is considered “non-consumptive,” meaning any water withdrawn is returned to its original source with little to no net loss.  The measure – introduced by Assemblymember Selena LaRue Hatch, D-Washoe – would largely impact geothermal operations in the state, which pump large quantities of groundwater before reinjecting the water back from where it was extracted. Some emerging lithium mining techniques operate in a similar way and are also exempt under current Nevada law. … ”  Read more from the Nevada Current.

‘It’s horrible’ — Utah snowpack hits worst levels on record

“Utah is experiencing its most dismal winter ever recorded.  A special report issued Monday by the National Resources Conservation Service noted that snowpack levels measured across the state are among the lowest recorded since the SNOTEL measuring equipment was installed in 1980.  “That’s of concern to all of us, because snow does more for us than provide ski slopes,” said Jordan Clayton, supervisor of NRCS’s Utah Snow Survey. “It’s critical to us as a state.”  Of Utah’s major watersheds, four have record-low snow, including the Weber-Ogden, Provo-Jordan, Tooele Valley-Vernon Creek and Lower Sevier basins. Another six are on the brink of setting historic lows. Those include the Northeastern Uintas, San Pitch, Price-San Rafael, Dirty Devil, Upper Sevier and Southeastern Utah watersheds.  “It’s horrible,” said Scott Paxman, general manager and CEO of the Weber Basin Water Conservancy District. … ”  Read more from the Nevada Current.

Southwest Utah has to lean on wastewater reuse because ‘the cheap water is gone’

“Mike Chandler walked to the edge of three large basins at the Confluence Park Water Reclamation Facility near St. George.  This is where the art of wastewater treatment happens, said the superintendent of the Ash Creek Special Service District, a local sewer authority.  “At the top of this main stairway is what we’re affectionately calling the poop deck,” Chandler said, reciting an abbreviated name for the plant’s process, observation and operations platform. “We are sewer folks. … We can’t take our jobs too seriously.”  It’s a light-hearted acronym for an urgent task: cleaning and reusing sewage to stretch Washington County’s limited water supply. … ”  Read more from KUER.

Colorado property owners beware: Invasive mussels might be coming to a pond near you

“Attention Western Slope pond owners: Colorado Parks and Wildlife is on the hunt for hungry, fast-reproducing, invasive mussels — and that they might be hiding in your pond.  State and federal agencies, plus water districts, are fighting to track and contain zebra mussels in and around the Colorado River in Colorado. Officials are hiring new staff, doing sampling blitzes and catching mussel-bearing motorized boats at the state’s borders, but the populations of zebra mussels keep popping up. This year, the state is taking its search beyond public waters and irrigation systems.  Colorado Parks and Wildlife staff hope to survey as many as possible of the thousand-plus ponds on private property in the Grand Junction area during summer 2026. … ”  Read more from the Colorado Sun.

In national water news today …

MAHA has reshaped health policy. Now it’s working on environmental rules

“On New Year’s Eve, Lee Zeldin did something out of character for an Environmental Protection Agency leader who has been hacking away at regulations intended to protect Americans’ air and water.  He announced new restrictions on five chemicals commonly used in building materials, plastic products and adhesives, and he cheered it as a “MAHA win.”  It was one of many signs of a fragile collaboration that’s been building between a Republican administration that’s traditionally supported big business and a Make America Healthy Again movement that argues corporate environmental harms are putting people’s health in danger.  The unlikely pairing grew out of the coalition’s success influencing public health policy with the help of its biggest champion, Robert F. Kennedy Jr. As health secretary, he has pared back vaccine recommendations and shifted the government’s position on topics like seed oils, fluoride and Tylenol. … ”  Read more from the Associated Press.

Irrigation & water use

“According to a U.S. Geological Survey report, agriculture is a major user of ground and surface water in the United States, and irrigation accounted for 47 percent of the Nation’s total freshwater withdrawals between 2010 and 2020. Water applied as irrigation allows for crop production in arid regions and supplements soil moisture in humid regions, when growing season precipitation is insufficient. Irrigation has enhanced both the productivity and profitability of the agricultural sector. According to the 2022 Census of Agriculture, farms with some form of irrigation accounted for more than 50 percent of the total value of U.S. crop sales, while irrigated land accounted for less than 17 percent of harvested cropland. Irrigated crop production helps to support local rural economies in many areas of the United States and contributes to the Nation’s livestock, food processing, transportation, and energy sectors. … ”  Read more from the USDA.

The future of NCAR remains highly uncertain

“This week’s mammoth U.S. winter blast wasn’t the only storm affecting the annual meeting of the American Meteorological Society occurring in Houston, Texas. Looming in the background of the meeting – and jumping into the foreground during an evening town hall on Wednesday, January 28 – was the fate of the National Center for Atmospheric Research, or NCAR, which the Trump administration is moving to dismantle.  Based in Boulder, Colorado, and sponsored by the National Science Foundation since its founding in 1960, NCAR (or NSF NCAR, as the center brands itself) is a premier national and global hub for weather, water, and climate-related research. Beyond carrying out its own work, NCAR manages aircraft and supercomputing resources used by many hundreds of scientists, and it collaborates with many public and private stakeholders. … ”  Read more from Yale Climate Connections.

About the Daily Digest: The Daily Digest is a collection of selected news articles, commentaries and editorials appearing in the mainstream press. Items are generally selected to follow the focus of the Notebook blog. The Daily Digest is published every weekday with a weekend edition posting on Sundays.