Nowadays, new HDB blocks have just one centralised rubbish chute. That's just one chute for the whole block, usually located off the lift lobby. As opposed to the old design where every kitchen had a chute. Which is still better than a Hong Kong block (a Happy Valley condo, no less) I once lived in which had no chute at all, and the residents just left their bags of garbage on the back stairs for the cleaners to dispose of.
But this one central chute means that every bag of garbage thrown down by every household in the whole block goes down that way. And when the garbage truck is late or doesn't come (as was the case yesterday), the garbage thrown out by everyone stacks up to more than two floors high.
That's what I found out when I took out the garbage -- when I stepped on the pedal to open the chute flap and tossed in my bag, I wondered why it wouldn't go down. Then I peeked in and realised that it was blocked by a towering mound of garbage bags that reached up to the second floor where we were. I should have gone up one floor to see if the mound reached the third floor.
That's how full of garbage my block is. :)