Potable Water Distribution to Disperse Communities

La Guajira, Colombia has over 3500 communities, with an average population of 20. Total 70,000 hab over a large area 21,000 sq-km The water source is underground and/or desalination. Lack of fresh potable water is one of the main causes of children's death.  I am seeking design ideas, previous experiences, installed solutions, commissioned projects, etc., all are welcome.