Tammy Murga | KPBS Public Media
Tammy Murga is the environment reporter at KPBS.| KPBS Public Media
The San Diego County Board of Supervisors voted this week to seek a $1.4 million pollution study of the Tijuana River Valley, which county officials hope will convince the U.S. Environmental Protection Agency to declare the area a Superfund site.| KPBS Public Media
Environment| KPBS Public Media
