According to the Numbeo water drinkability and accessibility index, tap water has a score of 23 / 100 (100 being best).
Numbeo considers this score to be "Low"
We are working on providing you with scientific reports about the water quality in Antananarivo, if you know a reliable source for that feel free to shoot us a message in the chat below or in the comments!
1 adult could save about 898$ per year in Antananarivo by drinking tap water instead of buying bottled water.
๐ณ Drinking tap water would also help with reducing your plastic footprint and improve environmental pollution.