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Water and sanitation services increase rapidly as a percentage of the population when the median household income is between 0 and 300 USD per month after which the increase is much slower. (Komives, 2003) | Water and sanitation services increase rapidly as a percentage of the population when the median household income is between 0 and 300 USD per month after which the increase is much slower. (Komives, 2003) | ||
Cost component US$ per m3 b % of total | |||
Estimated cost components for improved water and sanitation services at a 6% discount rate (UNDP, 2006) | |||
Cost component US$ per m3 % of total | |||
Opportunity cost of raw water supply .05 3 | |||
Storage and transmission to treatment plant .10 5 | |||
Treatment to drinking water standards .10 5 | |||
Distribution of water to households (including house connections) .60 30 | |||
Collection of wastewater from home and conveyance to wastewater treatment plant .80 40 | |||
Wastewater treatment .30 15 | |||
Damages associated with discharge of treated wastewater .05 3 | |||
Total 2 100 | |||
These numbers represent an average scenario. In arid regions of the Western United States, actual costs can be triple this and if costs are kept as low as possible, costs can be half of this. | These numbers represent an average scenario. In arid regions of the Western United States, actual costs can be triple this and if costs are kept as low as possible, costs can be half of this. | ||