Los Angeles County, California is the largest urban oil field in the country and home to thousands of active oil wells in very close proximity to homes, schools and parks.  Using state data, this new tools allows you to assess proximity of active or idle wells to your location and see how much oil or gas is produced nearby.  Overall, we find that 75% of active wells are within 2500 feet of residential buildings. 

The full StoryMap can be viewed here. A smaller version of the StoryMap can be viewed below.