A western Colorado family has filed a lawsuit saying that negligence by oil and gas drilling companies contaminated their drinking water and air and forced them from their home.

Beth and Bill Strudley and their sons, ages 11 and 13, moved in 2005 outside Silt but said they started living in Glenwood Springs this year to escape the effects of work by Antero Resources Corp. and subcontractors Frontier Drilling and Calfrac Well Services. The Strudleys still own the home outside Silt. Their lawsuit in Denver District Court accuses all three firms of negligence.

Denver-based Antero said it doesn't comment on pending litigation. Calfrac had no immediate comment, and a phone message for Frontier Drilling wasn't returned.

The Colorado Oil and Gas Conservation Commission, which regulates oil and gas development, has said it has found no scientific data that the water quality in the family's well was contaminated by drilling, but the Strudleys said they have conducted their own tests. They and their lawyers declined to disclose the results Thursday, saying only that they were "abnormal."

The family said they started getting sick after drilling started within a mile of their home in August. They wouldn't discuss details at a news conference Thursday, but Beth Strudley, 46, told The Post Independent of Glenwood Springs in January that they have suffered rashes and nosebleeds.