As the title of this thread suggests, we have an issue with sewer smell, but only in summer. I'm pretty certain it isn't caused by dry traps as the traps are flushed more in summer than any other time due to more showers, more laundry, etc. We haven't smoke/peppermint tested the vent yet because my gut tells me if it was the vent, it would happen at least once in a while during other seasons. As it is, it only happens occasionally, say two or three times during the summer. I'm wondering if the problem could be from our home's proximity to the sewage plant in our town and if so, if there is anything that can be done about it. There is our home, next to ours another and then next to that an apartment complex. After that, a 2 lane highway and then just on the other side of the highway, the treatment plant.
I know that might sound odd, but if this were a dry trap or bad vent situation, wouldn't this be a problem year round? In summer (obviously) raw sewage is going to smell worse. I have actually been able to smell it outdoors on a couple of occasions, and both times, I smelled it in the house first and then noticed it when I went outside. I dont' always smell it outside when it is happening inside though. I'm just wondering with our home being so close to the end of the line if it is possible that this is the cause. Any thoughts?