For most of the year, the Los Angeles River is sustained by a flow of wastewater.

Now, a battle is brewing between environmentalists and wastewater recycling advocates about where that wastewater should go. In an interview for “LA Times Today,” staff writer Louis Sahagun told host Lisa McRee about the water fight and the future of the LA River.

Much of the water in the LA River is treated sewer water. Most of it comes from toilet and sinks and is discharged by Glendale, Burbank and city of LA.