I wish I could believe that public ownership is the answer. However dh worked for a while in the water sector, and soon realised that during decades of the nationalised era, under-investment in the infrastructure had been rife.
And it’s always just as well to remember that it’s not just water we’re paying for, it’s also sewage. At the moment, not far from us in outer SW London, there are huge works still going on after several weeks, and causing major disruption, to sewage infrastructure. Every time we drive anywhere near, dh is mentally totting up the many, many millions it must be costing in manpower and plant, esp. the huge tanker-type vehicles that are removing all the waste water/sewage while they fix the problem.