When the Parr family started having serious health problems late in 2008, they had no idea it was associated with what they call "a multitude" of drilling operations that popped up near their 40-acre ranch in Decatur, 60 miles northwest of Dallas.
At first, Lisa Parr dismissed her migraine headaches, nausea and dizziness as the flu, but when her symptoms persistently got worse, she knew something more serious was involved.
"By 2009, I was having a multitude of problems," Lisa Parr told CNN. "My central nervous system was messed up. I couldn't hear, and my vision was messed up. My entire body would shake inside. I was vomiting white foam in the mornings."
In 2009, Lisa's husband, Robert, and their 11-year-old daughter, Emma, also became ill, suffering a laundry-list of symptoms.
"They had nosebleeds, vision problems, nausea, rashes, blood pressure issues. Being that the wells were not on our property, we had no idea that what they were doing on the property around us was affecting us," she said.