Water services are not for free. To increase affordability an easy measure is introducing progressive pricing. An example is water services in Belgium. The more you use the more you pay progressively. Large consumers (normally spoken rich people and industries) subsidize small users (normally poor). The current practice is often the other way around: the poor pay relatively more, because they pay per bucket (where there is no connection to public water supply) or large users are subsidized (often industries).
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