as the others have said, you do sometimes get nasty niffs from the drains hereHelp we have just rented a house in murcia region for 12 months a found it has a serious drain problem the owner has been several times and just says its because the house was empty a while. We have been here one month a cannot stand the smell anymore. Can we end our contract. Will we have to pay the full years rent if we do.
we were recently away for 3 weeks & came back to smelly bathrooms - after a couple of days I remembered to run the taps in the bidets - the water which had been 'standing' in the pipes was washed away & problem solved
as you've been there a month that's unlikely to be the problem so it would be worth having checked - but if the owner won't do anything do as jojo suggested & get someone in yourself
if you do want to move in the end you absolutely don't have to pay the whole year, & possibly not even a months notice if the place is unlivable - there's a link to the 'renter's law' in the useful links sticky thread above