With a series of quick, practiced strokes, Aïchatou Hamidou clears the area around a newly built latrine with a long broom made from dry grass.

After the trash and waste are swept into a tidy pile and safely disposed of, she unties the brightly patterned red handkerchief over her nose and mouth and adjusts the royal blue smock designating her as a member of the WASH (water, sanitation and hygiene) team.