It's one of the first questions on arrival: can you drink the tap water at the hotel or apartment? The short answer is that water leaving the treatment plant is monitored under Brazilian standards, but what reaches your glass also depends on its path inside the building. This guide explains who handles water in Rio, where to find the quality reports and how to decide case by case.
At a glance
- Who produces it: CEDAE, the state company, draws and treats the water from the Guandu system.
- Who distributes it: in much of the city, Águas do Rio; in Barra da Tijuca, Recreio and Jacarepaguá, Iguá.
- Monitoring: Águas do Rio's annual report says sampling follows the Ministry of Health potability standard (Portaria GM/MS 888/2021).
- The weak point: most buildings store water in cisterns and rooftop tanks (caixas d'água), and their condition depends on the building's maintenance.
- Play it safe: if in doubt, drink filtered or bottled water, especially on short stays.
Who treats and distributes the water
Since CEDAE's services were put out to concession, Rio's water passes through more than one company:
- CEDAE remains in charge of drawing and treating the water produced at the Guandu treatment plant, according to Agência Brasil ↗.
- Águas do Rio distributes water in 124 neighborhoods of the city, according to its 2025 quality report ↗.
- Iguá took over services in 2022 in Barra da Tijuca, Recreio dos Bandeirantes, Jacarepaguá and other West Zone neighborhoods, according to the same Agência Brasil report.
If you're staying in the Zona Sul or downtown (Centro), your water most likely comes through the Águas do Rio network; in Barra, through Iguá's.
What the quality reports say
The utilities publish annual water quality reports. Águas do Rio's report for the city of Rio (2025) explains that samples are taken under the Ministry of Health's Portaria GM/MS 888/2021 and presents, month by month, the analyses of turbidity, residual chlorine, color, total coliforms and E. coli. The same report notes that a non-conformity is confirmed with a new sample before action is taken.
You can see the reports for each municipality on Águas do Rio's water quality page ↗. The report also says what to do if you suspect a problem: don't drink the water and contact the utility.
The building's tank: the part no one sees
In Rio, it's very common for buildings to receive water from the network into a cistern and pump it up to a rooftop tank, from which it flows down to the apartments. That stretch no longer depends on the utility: the final quality depends on the building cleaning and maintaining its tanks.
That's why two apartments on the same street can have different water, and why there's no single answer for the whole city. Some signs to keep in mind:
- Odd color, smell or taste: don't drink it.
- Old building or no maintenance information: better not to risk it.
- Recent water outage: when service returns, the water may run cloudy for a while.
How to stay hydrated on your trip
- Ask at your lodging. Many hotels and apartments have a filter or water jugs; ask what they recommend.
- Use bottled water if in doubt. It's sold in supermarkets, pharmacies and newsstands.
- Bring a reusable bottle. Refilling it with filtered or jug water saves buying lots of bottles.
- Brushing your teeth and cooking: network water goes through the same monitoring; if the building's water worries you, use filtered water for these too.
- In summer, drink water often. On very hot days the city government issues alerts; see how to plan in Rio heat: alerts and tips.
If you're packing, the reusable bottle is on the list in what to pack for Rio.
Frequently asked questions
Is the ice in bars safe?
It depends on each place and the water it uses; there's no general data. If you have a sensitive stomach, order your drink sem gelo (no ice).
Is coconut water an alternative?
It's a very common drink along the beachfront, sold in the coconut or packaged. It doesn't replace water, but it helps for variety.
Who do I tell if the water looks bad?
The building or lodging manager, since the tank is their responsibility. If the problem seems to come from the network, the utility: Águas do Rio answers at 0800 195 0 195, according to its quality report.
Sources: Águas do Rio: 2025 water quality report, Rio de Janeiro ↗, Águas do Rio: quality reports ↗ and Agência Brasil: Iguá takes over services in Barra and Jacarepaguá ↗, accessed October 27, 2026.