I imagine that the overwhelming silence from the UK is because we get quite a lot of rain.

I wonder, however at the lack of mention of the fact (if I correctly recollect) that more water is wasted in the UK from supply pipe faults than actually reaches and is used by consumers.

Whatever the proportion, the wastage due to defective infrastructure is huge. It happens because the privatised water companies would rather pay dividends to shareholders than spend money on repairing said infrastructure.

Once again, the cause of problems for mankind is capitalism.