I'm having trouble keeping my cities water supply up. I can build some pumping-stations and water-towers which solves the problem, but only for a very short period of time.
I have now reached a point where almost the entire coastline is covered with pumping-stations and I also have truckloads of water-towers. I'm starting to think it is a bug but maybe somebody sees some obvious flaw with my water-pipe layout:

This is how the city looks like:

There are some high-density residential and industrial zones, but nothing that would require that amount of pumping-stations? There must be about 120-180 pumping-stations on that map.

