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ERSAR has developed a set of indicators to benchmark the performance of the more than 300 service providers. Starting in 2011, the set of indicators includes a macro-affordability indicator that tracks, for each municipality, the cost of consuming 10m3 of water as proportion of average household income. Colour ratings are given to municipalities: “green” when the cost is below 0.5% of household income, “yellow” when it is between 0.5% and 1%, and “red” when it is above 1%.

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