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There are huge differences between countries and between urban and rural areas in the share of the population with a connection to wastewater treatment facilities, although coverage has increased in general. In the Nordic and some other northern European countries with a long tradition of water purification, more than 85% of the population is connected to wastewater treatment facilities. The proportion falls to 40–60% in southern European countries, however, and below 40% in some other countries in the Region.
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