sewage backing up in sinks

I smell what seems to be sewage treatment chemicals coming from one toilet and sink area.This does not smell like sewage. It smells like treatment CHEMICALS. I used to live near a sewage treatment plant. I know the smell.I've been told that my home is ''at the end of the line'' whatever that means,...

Had the septic tank pumped in August, 2 months ago, but I am still having the same problem. The showers back up, the toilets fill up and bubble, and the sinks back up. What is the problem and what can I do that isn't costly? Cost me a few hundred dollars to have the septic tank pumped and it didn't...

My bathroom sink backs up to my kitchen sink both seem to back up when I do dishes toilet and shower have no problems I have had soneone come in and snake out drain and flows fine for a while than when I do dishes it backs up into bathroom sink and takes forever to drain what is the problem

When the shower stall is used, the water backs up into both bathroom sinks. The house is old, but all plumbing has been replaced about 5 years ago.

What would cause a bathroom sink and tub to back up when using a dishwasher or washing machine? ***We just had the septic tank emptied, thinking that this was the reason, since everything was backing up. Now I did a load of laundry and in the Kitchen Sink made a loud gurgle noise and then a few...