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Globally, an estimated 2.5 billion people lack access to improved sanitation.
Background: Refugees are at high risk for communicable diseases due to overcrowding and poor water, sanitation,
Mount Sinabung erupted in September 2013, causing the mass evacuation of more than 30,000 people.
Batch water treatment consists of the intermittent use of settling tanks for water clarification, and is a common treatment practice