I get a very potent smell of sewer gas coming from my house vent several times a day, I am the first house on the main sewer line. This smell started after the state in which I live in hooked a jet pump from a facility they own and started to pump their sewage into the main sewer line in frt of my house. I notified them but to no avial, what can I do to myself to eliminate the problem.

They do make a product called Odor Hog, (see image) that addresses your problem. Check it out at ; OdorHog(tm), roof vent pipe filter that stops septic tank odor. 1-800-963-6746 (http://www.odorhog.com/) Good luck, Tom