The Center for Biological Diversity recently urged California officials to release results from an investigation into thousands of oil industry injection wells in the Los Angeles area that may be contaminating water and threatening public health.

Source:: http://www.wateronline.com/doc/thousands-of-l-a-area-oil-wells-under-state-investigation-for-pollution-dangers-0001?atc~c=771+s=773+r=001+l=a