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Saturday, November 14, 2026Nov 14

Stormier times for California’s water expected under new law

FILE - In this Dec. 15, 2016, file photo, Julian LePelch paddles his kayak past a flooded field at Tamalpais High School in Mill Valley, Calif. California's first winter storm of 2017 will shed welcome rain over the rivers, pumps and pipes that move California's water from north to south, and may open a new era of tensions over where that water goes, under a new federal law dictating that the state's farmers get the biggest possible share. (AP Photo/Eric Risberg, File)
FILE - In this Dec. 15, 2016, file photo, Julian LePelch paddles his kayak past a flooded field at Tamalpais High School in Mill Valley, Calif. California's first winter storm of 2017 will shed welcome rain over the rivers, pumps and pipes that move California's water from north to south, and may open a new era of tensions over where that water goes, under a new federal law dictating that the state's farmers get the biggest possible share. (AP Photo/Eric Risberg, File)

SAN FRANCISCO (AP) – The first winter storm of 2017 to drop welcome rain over the rivers, pumps, pipes and canals that move California’s water north to south likely will open a new era of tension over how much water goes to fish or farms under a new U.S law.

Legislation signed Friday by President Barack Obama dictates that the federal portion of California’s heavily engineered water systems gives agricultural districts and other human users the biggest possible share of the most fought-over resource in a state with a six-year drought.

Water experts and conservationists expect that new mandate to conflict with state and federal laws and court orders meant to ensure enough water stays in Northern California’s Sacramento and San Joaquin rivers and delta for endangered native fish.

Dueling interpretations over what the new law means for water deliveries could foster tensions between the state and the incoming Trump administration and worsen the water wars among farmers, fishing industries and conservation interests.

“There’s going to be fighting, and it is going to commence almost immediately,” said Peter Moyle, a professor emeritus of biology at the University of California, Davis.