Tap water in Brazilian cities such as Rio and Sรฃo Paulo is generally safe to drink, but it tastes awful. In remote areas, tap water may be suspect. Many hotels and guesthouses filter their water โ be sure to inquire about the status where youโre staying. Vigorous boiling for one minute is the most effective means of water purification, though you can also use a water filter, ultraviolet light (such as a steripen) or iodine pills.
According to the CDC tap water is generally not safe for consumption.
According to the Numbeo water drinkability and accessibility index, tap water has a score of 62.72 / 100 (100 being best).
Numbeo considers this score to be "High"
1 adult could save about 402$ per year in Brazil 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.
Like in most countries, water quality and accessibility differs from location to location, therefore it's the best to check the information available on that place.