A few days after they had moved in, a neighbor welcomed them with disturbing news. "Your house used to be a meth lab," he said—a fact that the seller had never disclosed. So they called their realtor. He told them not to worry, that the house had been decontaminated. He even produced a certificate from the local health department to prove it.

Then the family started getting sick. Within five months, Jaimee and her husband developed sinus problems that required surgery. When their baby was born, he had serious lung issues that caused him to stop breathing a few times. He also wasn't gaining weight, and was in and out of the hospital.

So the Alkinanis had their house tested for methamphetamine. The results made Jaimee put her kids in the car and immediately abandon her new home, with all the family's possessions still inside. The house's level of methamphetamine contamination was 63 times higher than the level at which the Utah State Health Department condemns a house.

Houses formerly used as meth labs, called meth houses, put their residents at risk of serious health consequences, says Stan Smith, a doctoral student at the University of California, Los Angeles, and director of the Drug Endangered Children Task Force, a division of the California Drug Enforcement Agency.

Upon moving into a meth house, people have experienced short-term health problems ranging from migraines and respiratory difficulties to skin irritation and burns. Long-term problems are less well known, but the results from a 2009 study in Toxological Sciences suggest that methamphetamine chemicals may cause cancer in humans. And because children have small, developing bodies and a tendency to play on the ground and put things in their mouths, they are especially susceptible to adverse health effects from meth toxins. "When we go into a [meth] lab, if there are children, the first thing we do is take the children to the hospital and assess them for contamination," said Smith.

The chemicals used in methamphetamine production are highly toxic and can include not only pseudoephenadrine—the main ingredient in meth and active ingredient in decongestants—but also 32 other precursor chemicals. These include acetone, the active ingredient in nail polish remover, and phosphine, a widely used insecticide.

Home-cooking meth spreads toxins to every inch of the room where the meth was cooked and beyond. Nothing escapes contamination—the carpet, walls, furniture, drapes, air ducts, even the air itself becomes toxic. "Ingesting some of these chemicals, even a tiny drop, can cause immediate death," said Smith.

"When we go into a meth lab, we have on respirators, Tivec suits, shoe coverings, gloves, and eye goggles," said Sergeant Cory Craig, a state highway patrolman and narcotics specialist based in northern Missouri. Police treat methamphetamine labs as hazardous waste sites. They remove meth-making hardware and chemicals, and often hire professional cleaning companies to sanitize the house.