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How using and old tariff design could help improve water service in developing countries

Old tariff designs – before the introduction of meters – used the number of physical water fixtures in a household to charge domestic customers for water services. The same technique could be used today to classify poor customers, who have fewer water fixtures, from wealthier customers, thus enabling water utilities to establish separate poor-customer-tariffs and thus charge wealthier customers the full cost of providing them with service.