sewage issue

[Josiah Charland]

I purchased my current residence as a cash offer about a year and half ago. It was a fixer that I moved into. Today my neighbor came by while it was raining and told me that he thinks something is wrong with my sewage and that it's making his backyard smell. He beleaves that the people that owned the house before didn't do a good job and wants me to look into it. I didn't really smell anything myself and not sure what to do in this situation. Am I required to do anything? I live in redding ca and any help would very much appreciated.