Not really a leak as such but a massive waste of water. Almost on a daily basis the owner of the above property has a hose coming out of the front door into some sort of tank in a van on the road outside. It is left running until it overflows and then it can sometimes be left for hours with the water continuing to run down the road. 
I'm guessing this person isn't on a water meter or he surely wouldn't be so wasteful. 
The other issue is the hose draped across the pavement, sometimes when it's dark which is dangerous and possibly illegal.