U.S. Sens. Ted Cruz and John Cornyn want to limit the U.S.’s
engagement with Mexico after the country failed to deliver
water to Texas under a 1944 international water treaty. The
Texas senators filed legislation Thursday that would limit the
U.S. from sending Mexico future deliveries of water and would
allow the U.S. president to stop engaging with Mexico in
certain business sectors that benefit from U.S. water. The
treaty requires the U.S. to deliver 1,500,000 acre-feet of
water from the Colorado River to Mexico every
year.
Two Kings County water agencies are holding public workshops
Nov. 12 and 14 to explain their pumping allocations. The
Mid-Kings River and South Fork Kings groundwater sustainability
agencies (GSAs) both passed draft sustainable yield pumping
allocations for their farmers in October. … But South Fork
farmers objected to Mid-Kings’ allocation of 1.43 acre feet per
acre of land, which is more than double what was set in South
Fork at .66 acre foot per acre of land.
It could cost $27 million, or more, to revamp and reopen
the Kernville hatchery as a Kern River rainbow trout
breeding facility, according to a report commissioned by the
California Department of Fish and Wildlife. Costs would be less
to rehab the hatchery as just a fish planting base but neither
the report nor CDFW had estimates for that lesser function. In
either case, those amounts are separate from what CDFW is
already spending to rebuild about a mile-long siphon to bring
Kern River water into the hatchery. The siphon project is
expected to cost $7 million and be completed in 2027.
California legislators considered dozens of bills related to
artificial intelligence this year. That’s a number that’s
climbed quickly over the last couple years as lawmakers grapple
with the technology’s increasing presence — and possible
negative impacts. And one growing point of concern
involves generative AI’s relationship with state resources as
the technology becomes everyday life for Californians. Experts
say generative AI is driving up energy and water
demands at data centers. But the question is: By
how much?
… In this intergenerational conversation, three writers who
carry Western rivers in their blood talk about their boating
lives, creative bents, and views of moving water, in their
earlier years and now. Zak Podmore, whitewater boater and
award-winning journalist, joins us from Bluff, Utah. His books
and articles attracted the notice of Rose McMackin, former
whitewater guide, freelance journalist, and pop culture writer
in Austin, Texas. She is also the daughter of our third guest,
Becca Lawton, an author, fluvial geologist, and pioneering
Grand Canyon boatwoman living in Northern California.
On October 29, 2025, the California State Water Resources
Control Board’s Division of Drinking Water (State Water Board)
issued new and revised notification levels and/or response
levels for four per- and poly- fluoroalkyl substances (PFAS).
… California’s notification and response levels are
non-regulatory, health-based advisory levels established for
contaminants in drinking water for which State MCLs have not
been established. These are established as precautionary
measures for contaminants that may be considered candidates for
the establishment of MCLs. MCLs, in contrast, are legally
binding limits that public water systems are required to meet.
State water officials have taken the first formal step toward
regulating groundwater pumping in the Ranegras Plain
Groundwater Basin, marking a major shift for La Paz County
residents who have long warned that unregulated water use is
threatening their communities. The Arizona Department of Water
Resources announced it will begin procedures to consider
creating a new Active Management Area, or AMA, in the western
Arizona basin. The move follows years of local concern about
land subsidence, dried wells, and groundwater depletion linked
to corporate water use in rural parts of the county.
Achieving water sustainability in many water-scarce regions
will require reducing consumptive water use by converting
irrigated agricultural land to less water intensive uses.
Conventional approaches to this challenge that emphasize water
conservation as a singular objective often promote ad hoc
practices that temporarily leave land idle while missing an
opportunity to enhance landscape resilience and harness
synergies of managing water and land together. Multibenefit
land repurposing offers an alternative solution to this
challenge by strategically transitioning irrigated agricultural
land to other beneficial uses that consume less water and
provide benefits for multiple constituencies.
After hearing again from local residents regarding the need for
increasing water storage infrastructure before the Pacific Gas
and Electric Company fully decommissions its Potter
Valley Hydroelectric Project and removes the dams that help
fill Lake Mendocino, the Mendocino County Board of
Supervisors this week passed a resolution that many argued did
not express their needs forcibly enough. … At their
previous meeting on Oct. 21, the board did not advance [First
District Supervisor Madeline] Cline’s resolution, voting to
instead bring forward a modified version drafted by Fifth
District Supervisor Ted Williams.
Fresno County has reclaimed its spot as the nation’s top
agricultural producer despite “extraordinarily difficult”
circumstances. According to the Fresno County Farm Bureau’s
(FCFB) 2024 Crop and Livestock Report, the county produced
$9,029,122,000 in total gross production in 2024. … How
did they do it? [Fresno County Farm Bureau CEO Ryan] Jacobsen
thanks hard work and water. “Food grows where water flows, and
2024 was a good water year for our county, allowing farmers to
grow the full rainbow of crops that we are capable of here,” he
said.
In 2022, Governor Gavin Newsom released California’s Water
Supply Strategy, outlining necessary actions for the state to
adapt to a hotter, drier future where the changing climate
leaves less water to meet California’s needs. Since then,
California water managers have been looking at ways to address
the fact that the warming climate means that when storms do
come, a greater share of that rain and snow will be absorbed by
dry soils, consumed by thirsty plants, or evaporate into the
air.
The U.S. water and wastewater treatment market is forecast to
grow from approximately US $130.3 billion in 2025 to about US
$238.4 billion by 2034, representing a compound annual growth
rate (CAGR) of roughly 6.94%, according to a Towards
Chem&Materials report. The report states that
municipal utilities account for nearly 52% of the market in
2024, with industrial treatment services close behind at 38% —
and poised for the fastest growth.
Utah wildlife officials are again reminding people that it’s
illegal to dump fish into bodies of water after state
biologists discovered an unapproved species had been introduced
at a southeast Utah reservoir. Biologists found smallmouth
bass at Loyds Lake, located within the Colorado River drainage
located southwest of Monticello, while doing routine surveys,
the Utah Division of Wildlife Resources reported on Wednesday.
The reservoir is home to rainbow trout and green sunfish, but
not bass, largely because of its proximity to the Colorado
River and the threat to native fish within it.
Tree rings can tell a story. Wide bands signal a wet period,
while narrow ones show a drought. Whole ecosystems can be
encoded in trees. In Western Colorado, scientists are examining
trees to find out more about the environment’s story in an
effort to protect the river they stand along. … The
Crystal River is one of the few rivers in Colorado that doesn’t
have any major dams; large stretches of it are still pristine.
… At the heart of what Cooper, Brown and Merritt are
trying to do with this study is establish the relationship
between the trees and the Crystal’s natural hydrologic rhythm,
which wouldn’t exist if it were dammed or diverted.
The October floods in southwestern Colorado damaged homes and
upended people’s lives, but there was one silver lining: A lot
of the water also helped replenish reservoirs
in the state. The deluge, caused by tropical storms and
hurricanes in the Pacific Ocean, dumped more than 480 billion
gallons of water on five counties in southwestern Colorado.
… But the water also bumped parts of the region out of
severe and extreme drought. The amount of water stored in
Colorado reservoirs surged or even doubled.
Other weather and water supply news across the West:
An empty and often overlooked parcel across from Sylvan Park is
being reimagined as a vibrant native plant and pollinator
garden. … Once completed, the 13,000-square-foot garden
will feature drought-tolerant native species, pollinator
habitats, educational signage, public seating, and engraved
pavers honoring donors. … The garden also supports the
city’s Climate Action Plan by promoting water conservation.
Case studies from the city’s Municipal Utilities and
Engineering Department show that properties switching to native
landscaping reduced water usage by as much as 70 to 80
percent.
… Perhaps no region stands to take larger hits to its
Colorado River water than central Arizona, owing to the low
priority of its water rights. … Unless Arizona’s farmers
and tribes can strike deals to bail out the state’s growing
cities, Arizona’s largest population centers will bear the
brunt of these cuts. Cities like Phoenix, Scottsdale and Tucson
could lose more than 20% of their Colorado River water,
triggering public debates in council chambers and municipal
offices over how to respond, what to sacrifice and what to
prioritize.
California often swings between climate extremes — from
powerful storms to punishing droughts. As climate change drives
more intense and frequent dry and wet cycles, pressure on
California’s water supplies grows. A new University of
California, Davis, economic study finds that drought in
California pushes the price of water from rivers, lakes and
reservoirs up by $487 per acre-foot, more than triple the cost
during an average wet year. The research appears in Nature
Sustainability.
Blue veins of ice streaked the snow this January in Salt Lake
City, Utah. Snow hydrologist McKenzie Skiles eyed the veins,
worried. … Studies from her lab and others find that less
snow is falling on mountains worldwide, and there’s more rain
in the forecast. … [C]limate models of California’s Sierra
Nevada Mountains predict that, at 3 degrees warming,
more than half the range’s precipitation will fall as rain, not
snow. That would be disastrous for the Golden State,
where snowmelt from the Sierras is a third of the water supply.
California simply doesn’t have the infrastructure to capture
all that water from rain. More rain will also change flood
risks. … Overall, less snow compromises drinking and
agricultural water storage in the West.
One of the most picturesque and affluent communities along Lake
Tahoe is dealing with a nasty problem: potential raw sewage
contamination. A boil water notice was sent Monday to residents
of Incline Village, situated on the north end of Lake Tahoe in
Nevada, after a water main break resulted in a loss of pressure
in the water distribution system. In the notice, officials with
the community’s general improvement district said the loss of
pressure could cause backups through cracks and joints in pipes
and pose a “high potential that fecal contamination or other
disease-causing organisms could enter the distribution system.”
