We are in PS from last 1 year or so, I was concerned when we were planning to move here, but i am pleasantly surprised , landfill is not an issue at all.  We go for walk a lot in the beautiful walking trails, around the lovely landscape in PS and in hills, I havent even once smelled anything bad. 
I don't want to mislead anyone, these are my personal observations. Honestly speaking, we love it here, i think PS is better than CV and WB.