A case over "who can be held responsible for polluted storm water that runs off city streets and into rivers and bays" is headed to the U.S. Supreme Court tomorrow. The court's ruling on the Los Angeles case could have far-reaching impacts.

discusses the details of the case, which "arises from a long-running dispute between Southern California environmental groups and the Los Angeles County Flood Control District over the billions of gallons of polluted water that flow into the Los Angeles and San Gabriel rivers after heavy rainfalls."
"Storm water runoff 'is the No. 1 source of pollution in the rivers and along the coastline,' and it sickens thousands of beach visitors every year, said Liz Crosson, executive director of Los Angeles Waterkeeper [a plaintiff, along with the Natural Resources Defense Council]. Advocates hoped the lawsuit would force the county and all of its municipalities to adopt stricter measures to prevent pesticides, trash, used motor oil and other chemicals from flowing into storm drains."
The case illustrates the difficulty of regulating storm water and of assigning blame for the sources of pollution, says Savage. "County officials agree storm water is polluting the rivers but disagree on who is responsible."
"Yes, there are pollutants in the water, but dozens of municipalities are upstream from there. It's a collective runoff. It doesn't point to a particular source," Gary Hildebrand, assistant deputy director of the L.A. County Flood Control District, said in an interview.
"Experts on both sides agree they have seen progress over the past two decades in limiting pollution from storm runoff, but more needs to be done. 'This is a very complex problem,' Hildebrand said. 'There is a lot more to do, and we need to do it municipality by municipality, across the watershed.'"
FULL STORY: Supreme Court wading into L.A. County storm water case

Maui's Vacation Rental Debate Turns Ugly
Verbal attacks, misinformation campaigns and fistfights plague a high-stakes debate to convert thousands of vacation rentals into long-term housing.

Planetizen Federal Action Tracker
A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

In Urban Planning, AI Prompting Could be the New Design Thinking
Creativity has long been key to great urban design. What if we see AI as our new creative partner?

King County Supportive Housing Program Offers Hope for Unhoused Residents
The county is taking a ‘Housing First’ approach that prioritizes getting people into housing, then offering wraparound supportive services.

Researchers Use AI to Get Clearer Picture of US Housing
Analysts are using artificial intelligence to supercharge their research by allowing them to comb through data faster. Though these AI tools can be error prone, they save time and housing researchers are optimistic about the future.

Making Shared Micromobility More Inclusive
Cities and shared mobility system operators can do more to include people with disabilities in planning and operations, per a new report.
Urban Design for Planners 1: Software Tools
This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.
Planning for Universal Design
Learn the tools for implementing Universal Design in planning regulations.
planning NEXT
Appalachian Highlands Housing Partners
Mpact (founded as Rail~Volution)
City of Camden Redevelopment Agency
City of Astoria
City of Portland
City of Laramie