When it comes to the history of your home, sometimes ignorance is bliss.

When we knocked on Patti Leininger's door, she had no idea that she had recently purchased a former meth house.

"No, we had no idea. We weren't told anything like that," said Leininger.

Her home is on the Drug Enforcement Agency's list of former meth labs posted on the internet. It is among 50 of them here in the Miami Valley.

Patti Leininger said her Xenia Ave. house was in need of repairs but a good deal.

"I'm mortified though, because that's something we should have known," Leininger said.

In Ohio, that is a secret any seller can keep to themselves.

Bob Wilson of the Dayton Area Board of Realtors said, ""There twenty states in the United that actually right now, do require some sort of disclosure of meth labs, but not Ohio."

That is a problem for buyers because experts say even long after the meth lab is dismantled, the dangers remain.

"The odor dissipates quite quickly so you aren't going to detect it just by smell," said Tom Hut, Public Health Dayton-Montgomery County.

If the house is not ventilated, carpet and other porous materials removed, walls and ceilings cleaned, there is a risk of inhalation exposure to the chemicals used to make methanphetamine.

Hut said, "Those risks include brain damage, central nervous system impairment, damage to a child's kidneys and liver. It can affect all the organs of a developing child."

In May, police found two children and a pregnant woman inside a Fairborn house along with a large amount of chemicals used to make meth.

Bruce may, Director, Ace Task Force said, "Once you mix them together, they become a Molotov cocktail for disaster."

With all the families in the neighborhood, May said it was just lucky that the house did not catch fire or explode.

"Now when we leave here, we know that it is not dangerous to the neighborhood and the people. Can you clean it up more? Yes you can clean those carpets. Would I do it if it was my house? Yes," said May.

Until lawmakers require sellers to disclose if there house was a former drug den, there will be people like Patti Leininger.

Patti said she would not have bought this house, had she known.

"I have children. I wouldn't have brought them into something like that." said Patti.

However, Patti and her husband are remodeling the home. They have already replaced the kitchen with new cabinets, counter tops and flooring.

They hope to turn a house with a sordid past, into their dream home.

To view the former meth house list, click here