A bird lands near the banks of the LA River just after a morning of rainfall on November 21.
After going to the U.S. Supreme Court twice, it's settled.
Los Angeles County is responsible for storm water pollution which flows down the Los Angeles and San Gabriel Rivers. This morning the Court decided to let stand a 9th circuit ruling finding that the county violated the Clean Water Act.
Here to explain what's going on is KPCC's environment correspondent Molly Peterson.