Health officials warn the outbreak, which has killed at least 194 and infected about 2,300 others, could get worse.
The latest figures from Haiti show a cholera outbreak has now claimed nearly 200 lives, with another 2,300 people reported to be sick.
So far the outbreak is concentrated around Saint Marc, north of the capital.
However, Al Jazeera has found evidence the disease is spreading closer to Port-au-Prince.
Sebastian Walker reports from the Haitian capital.