In Rio, a beautiful beach doesn't necessarily mean the water is fit for swimming. INEA, the state environmental agency, tests the water at the beaches and publishes a weekly bulletin showing where you can go in. This guide explains how to find it and read it in two minutes before you head out.
At a glance
- Who reports it: INEA ↗. It monitors 291 points on 197 beaches across the state.
- Where: the water quality page links to this week's bulletin (PDF) and to the interactive SEIRHI portal.
- What to check: the color of each point (green, própria; red, imprópria) and the date of the latest sample for your area.
- After heavy rain: INEA recommends staying out of the water for the following 24 hours.
- Note: the bulletin covers water quality, not waves or currents.
What própria and imprópria mean
INEA measures bacteria that indicate sewage contamination, following Conama Resolution 274/2000. According to its explanation of the monitoring ↗:
- Própria (fit): the point falls into the excellent, very good or satisfactory categories, based on samples from the previous five weeks.
- Imprópria (unfit): the point doesn't meet those criteria, or the latest sample exceeded the maximum limit.
Because the rating is given per point, the same beach can be fit in one stretch and not in another. Areas near canals and storm drains, known in Rio as valões, tend to get worse results.
How to read the bulletin, step by step
- Go to INEA's water quality page ↗ and open the link to this week's bulletin.
- Find your area in the index. Municipalities run from Paraty to São Francisco de Itabapoana. Rio is split into Zona Sul (from Glória to Leblon), Zona Sudoeste (from Joatinga and Barra da Tijuca to Barra de Guaratiba, including Prainha and Grumari), Paquetá, and Ilha do Governador and Ramos.
- Look at the map. Each sampling point has a green (própria) or red (imprópria) marker next to the beach name.
- Check the "Última amostragem" date. It appears below each map. In the bulletin published on October 23, 2026, Zona Sul and Zona Sudoeste had samples from October 21, while other parts of the state had samples from earlier weeks. If the date is old, the result says little about today's water.
If you prefer an interactive map, INEA offers the SEIRHI ↗ portal with the same geo-referenced data.
What to do with the result
- If your beach is red: pick another stretch marked green, or spend the day on the sand without going in.
- If it rained heavily: even if the bulletin says própria, wait 24 hours before swimming, as INEA recommends.
- Near a canal or drain: keep your distance, even if the nearest point is green.
- With kids: stick to green stretches with a recent sample; ideas for the rest of the day in Rio with kids.
Fit water doesn't mean a calm sea
The bulletin doesn't assess waves, currents or whether lifeguards are on duty. On open-ocean beaches like Prainha, waves can be strong even when the water is fit. Follow the flags and the lifeguards' instructions, and if you're not a strong swimmer, stay where you can touch the bottom. More beach tips in safety in Rio.
Frequently asked questions
How often is it updated?
INEA publishes one bulletin a week. Each area shows its own sampling date, which can be days or weeks earlier.
Is there a fixed list of clean beaches?
No. Water quality changes with rain and currents, so a beach that's fit this week may not be next week. Check the bulletin close to the day you go.
What about INEA's app?
The agency promoted an app for checking beaches at one point, but we couldn't confirm it's still available. The web bulletin and the SEIRHI portal are the sources we found up to date.
Which beaches are nearby?
See the beach guide and, if you want to go beyond Zona Sul, how to get to Prainha and Grumari.
Sources: INEA: beach water quality ↗, INEA: how monitoring works ↗ and weekly bulletin of October 23, 2026 ↗, accessed October 27, 2026.