Singapore does pretty well, considering their 'traditional' main water supply is situated in another country (Malaysia): https://en.wikipedia.org/wiki/Water_sup

Singapore does pretty well, considering their 'traditional' main water supply is situated in another country (Malaysia): https://en.wikipedia.org/wiki/Water_supply_and_sanitation_in_Singapore#Water_sources_and_integrated_management https://en.wikipedia.org/wiki/Water_supply_and_sanitation_in... They currently have the capacity to satisfy 30% of water demand using 'reclaimed water' (i.e. recycled) and 10% using desalinated. Although I don't think they actually need to fully utilise these capacities as 50-75 per cent of their water needs are met by man-made rainfall catchments.