The University Park neighborhood of Los Angeles has a lot in common with urban areas across the U.S.: A dense population with lots of businesses and housing.... There are approximately 1, 000 active or idle wells in the city, according to a city controller's report citing data from the state Division of Oil, Gas and Geothermal Resources. Los Angeles doesn't have pumpjacks dotting a desolate desert like western Texas.... USC researchers found people living near wells in Diaz’s neighborhood and