There is an odor in the house. I cannot determine what it is or source. It is around the radiators and back of basement where a sewage drain is. There is some kind of powder stuff, I guess for bugs all around the area in this houses. The stench reminds me of an animal urine smell. Don't know what it is but it is making me ill. How or who do I call to find out what it is.

Call a plumber