KJZZ has been committed to covering Arizona’s water challenges, in our ongoing series, “Every Last Drop.” And this week, we’ve been looking into the contaminants that pose threats to the state’s increasingly precious supply of drinking water. Tempe voters on Tuesday rejected a set of ballot measures that would have created a new venue for the Arizona Coyotes. Plus the latest in metro Phoenix, Fronteras Desk, tribal resources, education and science news.