Have had sewage odors coming in mobile home for over 7 months. Have several medical problems doctors don't seem to know what is causing them. Plumber found an open pipe in a wall this past Friday and closed off as well as putting some sort of filter on washing machine. Do you know what the side effects and medical problems are from long term exposure? Sometimes it was so strong in house that you could not breath. Please give me an answer as have checked many sites and am finding out alot about Methane gases and other gases caused by sewage. Still need to know what systoms are though . Please, please help. Thanks, Nicki B.