A federal class action claims Exco Resources contaminates groundwater by hydraulic fracturing, or fracking-- injecting water and toxic chemicals into the ground to extract natural gas, which blew out a well. 

David L. Andre filed the suit on behalf of himself and other residents of Caddo Parish in U.S. District Court in Shreveport, La., claiming that Exco's actions have contaminated the groundwater in the area DeBroeck Landing.

The suit argues that the Carrizo-Wilcox aquifer system was polluted on April 19, 2010, by a well blow-out involving Exco natural gas wells operating nearby.

Following the blow-out, class members had to evacuate their homes and were advised by public health officials that the water represented a continuing health and safety hazard so severe it could not even be used for washing clothing or bathing.

Government officials have also warned the residents against smoking or having any kind of open fire near water systems that obtain water from the Carrizo-Wilcox aquifer.

The suit says that natural gas and other pollutants now contaminating the water supply are not naturally found in the aquifer and are there only because of the well blow-out.

The suit asks that Exco be required to pay for a “full and complete evaluation and remediation” of the groundwater underlying the class members' property.