Hi I live on the 1st floor of a three floor apartment complex. In the past two months we have had three episodes where a pipe in the back yard will start spurting out water and toilet garbage and my toilets will bubble and/or lose water and eventually clog. The first time I figured it was my fault, so after they snakes the pipe in the back and I was able to flush I began monitoring what I put down the toilet. Only small amounts of a very thin toilet paper. But recently it has clogged twice. I wonder If the problem is not caused by me but by other neighbors. Is this possible? What should I do?

In the past two months we have had three episodes where a pipe in the back yard will start spurting out water and toilet garbage and my toilets will bubble and/or lose water and eventually clog. LUCKY YOU! That there was a pipe out in the back yard that was open.
Living on the first floor, had it not been for that pipe , you would have had three floors of waste and sewerage coming up out of your toilets. Add to that the tenets above wouldn't know that there was a problem and just keep on drainage and flushing.

recently it has clogged twice. I wonder If the problem is not caused by me but by other neighbors. Is this possible? What should I do? Of course it's caused by the tenets above you. Call your maintenance man or the land lord and have this repaired ASAP. And I would keep that line open in the back yard until they do. Good luck, Tom