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BaixaData • Articles

Articles & Coastal Guides

In-depth guides on CETESB water quality standards, ocean safety, and choosing the best beaches across the São Paulo coast.

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Regional Guide6 min read

Complete Guide to Baixada Santista: Choosing Between Santos, Guarujá, São Vicente & Praia Grande

Explore the geography, coastal infrastructure, highway access, and beach profiles across the four major municipalities of the Baixada Santista metropolitan coast.

  • •4 coastal municipalities monitored in real time (20 major beaches)
  • •Only 70 km from São Paulo city via the Anchieta-Imigrantes Highway System
  • •Diverse shoreline: sheltered calm bays, wide urban boardwalks, and Atlantic surf coves
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Water Quality & Safety5 min read

CETESB Water Quality & Ocean Safety: Suitable vs. Unsuitable Beaches and the 24h–48h Post-Rain Rule

Learn how São Paulo’s environmental agency (CETESB) conducts weekly microbiological beach testing and why you should avoid swimming for 24–48 hours after heavy rain even on green-flag beaches.

  • •Weekly microbiological sampling of indicator bacteria (Enterococci) over rolling 5-week cycles
  • •Safety threshold: ≤ 100 CFU per 100 ml in at least 80% of recent water samples
  • •CETESB Golden Rule: avoid ocean bathing during and 24h–48h after intense rainfall
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Beach Picks & Routes7 min read

Best Beaches in Baixada Santista by Profile: Family Trips, Calm Waters, Surfing & Dining

Find out which beaches in Santos, Guarujá, São Vicente, and Praia Grande are best suited for children, surfing, scenic walks, or beachfront dining.

  • •For Surfing & Clean Water: Praia do Tombo (Guarujá) and Itararé (São Vicente)
  • •For Calm Waters & Families: Guaiúba (Guarujá), Gonzaguinha (São Vicente), and Aparecida (Santos)
  • •For Urban Boardwalks & Dining: Gonzaga (Santos), Canto do Forte (Praia Grande), and Pitangueiras (Guarujá)
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