Find out whether the beach is safe for swimming.
Check official water-quality data for beaches all across Brazil for free — collected directly from state environmental agencies.
Know before you go in the water.
The platform in numbers
Real coverage, updated regularly from official state sources.
How it works
From collection at state agencies all the way to you — a simple, auditable, and transparent process.
We collect official data
We access reports and APIs from state environmental agencies (IMA, CETESB, INEMA, and others) directly at the source.
We standardize
Each agency publishes in its own format. We turn it all into a unified structure: location, status, date, and source.
We update the map
The data is processed and shown on the interactive map, always with the date of the latest sample visible.
We make it freely available
Anyone can check it, no sign-up required. Open, transparent data, with a link to the original source.
Official sources
Data collected directly from the state environmental agencies responsible for monitoring water quality.
Methodology
How we ensure the data is reliable, traceable, and up to date.
Collection from official sources
The data comes directly from state environmental agencies: PDF reports, public APIs, and institutional portals. We don't use third-party data or estimates — if there's no official data, we indicate that information is missing.
Standardization per CONAMA 274/2000
The water-quality classification follows CONAMA Resolution 274/2000, which defines the parameters for a beach being Safe or Unsafe for swimming based on bacteriological indicators (E. coli and enterococci). Each agency may publish data with variations in format and frequency, and our standardization layer ensures consistency in presentation.
Regular updates
Update frequency varies by state. Some agencies publish weekly, others every two weeks or monthly. Each point on the map shows the corresponding sampling date, so you know exactly how recent the information is.
Full transparency
Every piece of data shown is traceable: issuing agency, sampling date, and link to the original source. Our platform is an aggregator — the final word always belongs to the competent environmental agency in your state.
Frequently asked questions
Everything you need to know about Praia em Dia.
For developers
Integrate official water-quality data into your system — free, open, and based on official sources.
About Praia em Dia
Praia em Dia was born from the realization that official water-quality data exists and is public — but it's scattered across dozens of state agency websites, in different formats, with no single place to check.
Our mission is to centralize this information in a clear, accessible, and reliable way, so anyone in Brazil can know, before going in the water, whether that beach is safe for swimming.
Check beachesContact us
Have a suggestion, found incorrect data, or want to talk about a partnership? Send us your message — we'll get back to you soon.