An independent audit of Baja California’s water agency has found that many international companies with operations in Baja California have paid for only a fraction of the water they’ve used for years and have dumped waste without approval into the overburdened Tijuana sewage system. Also on KPBS’ San Diego News Matters podcast: the Chula Vista Police Department is broadening its use of drones, California is moving toward a future when plastics will help build the roads people drive on and more local news you need.