My house stinks like sewage really bad only when it rains really hard, my septic was just pumped out about a year and a half ago, seems to smell more potent in basement , what are some things it could be?

My house smells like sewer gas, only when it rains hard my basement is unfinished although plumbed for a future bathroom. All of my traps have water in them. Just the one bathroom/ laundry room, and a kitchen upstairs and all fixture traps are full and I cannot notice any cracks in any pipes, it has been like this for the past 2 days as we have had a lot of rain where I am from. However where my drain tile drains down under the driveway on to my lower lot, where I found the pipe today it was covered with brush and debris over the years could this be my problem I dug it out and a little trench to a ditch and water has been flowing good out of it ever since,

Hey dave, how is the toilet rough in pipe capped in the basement, there is no trap under that pipe. City sewer or septic field?

The future toilet is has a thin blue test cap glued on it, I'm in the country so septic field. Everything that drains from upstairs goes out to the septic through a pipe 4 feet off the floor through the foundation wall and the basement rough in is in the floor. They must tie in together outside the house? Thanks

Davey, Got your PM. Where is the smell the worst? Does it smell worse when anything's flushed or drained?

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everything that drains from upstairs goes out to the septic through a pipe 4 feet off the floor through the foundation wall and the basement rough in is in the floorthe basement rough in is in the floor. They must tie in together outside the house?

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OK! If the sewer main's 4' off the floor and your basement roughed in for a bath room. How's the discharge going to raise up those 4 feet? To get out to the septic tank? Do you have a ejector pit installed? Back to you. Tom

Well that's what I was thinking I should have a hole with a tank and sewage pump in my floor but I do not, because I know " doesn't run up hill" lol but where would it go in my unfinished basement I have a rough in for shower/tub, basin, and toilet and a floor drain and then a main cleanout for that bathroom as well because it is all underground piping, The smell is the worst in the basement. My lawn however is very very swampy as my neighbor had redone his drain tile about a year ago and my yard is very wet, I have got a little water in threw the foundation but I cleared out my pipe at the lower end of my property and it seemed to have got rid of all the water, but my house still stinks. Tonight I just noticed also. When we had the toilet flushing at same time as washer draining around my toilet was soaked and in the basement... and my toilet bubbles when washer drains... could all this water be getting in to my septic tank and not going anywhere and causing it to be full and causing drainage problems in the house??

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could all this water be getting in to my septic tank and not going anywhere and causing it to be full and causing drainage problems in the house??

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I think you're getting blowback from the septic system sending sewer gas through your traps and that's your "stink".

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my lawn however is very very swampy as my neighbor had redone his drain tile about a year ago and my yard is very wet,

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Sounds likeyour drainfield's saturated causing your septic tank to losd up. The first thing I would have looked at is your septic system. Good luck, Tom