Our newly built home has had a septic odor specifically in the bathroom closest to the septic tank ever since we moved in. The septic tank is approximately 20 feet away. We reported this to our builder who had us remove the covers on the roof vents to no avail. Then they sent someone out (twice) to caulk around the toilet(makes no sense to me, the smell is from inside the bowl) and of course this did not work. I have added Rid-X and this works somewhat for a few days then the smell is back. Could this be due to a faulty septic installation? Please help, I don't know where else to turn.

Septic tank odors