two nights ago we had a really big storm where our power went out for a few hours. we didn't get any flooding, thankfully, that we could find. but now, 2 days later, our basement smells like eggs and it's starting to seep to our first floor through the vents (i'm assuming). i don't really know if it's from the storm, but that's all that has happened recently that i know of that may have caused this. does anyone have any other ideas or advice?
do you have any floor drains in the basement? if not then only thing I can think of is the basement sink trap has lost its water seal against the sewer gases. that, or else the sewer line itself the level rose to a point where the grey water bubbled up through the sink trap along with the gas and the stink stayed there until the water level went back down.
thanks so much for the tips! we do have one floor drain in our laundry room. the smell has lessened considerably since yesterday, so it may just be that the water level rose like you said during the storm. but it's hard to tell if it's really gone away or just changed. the eggyness is definitely not as strong but it seems a lot mustier or something. (we also live in a townhome, if that makes a difference.)
being in a townhouse shouldn't be a factor as everybody's sewer terminates in a common waste line at the street. if the town's storm drains also go into the sewer instead of a interceptor drain then when the level goes up, everybody's drain will go up. there is no trap between the town's sewer system and your house. all you got is the stack vent that goes up through your roof.
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