Overview
- The latest report lists Sauce Grande, Cuero de Zorro, Cañadón, Rocha, Lobos, Monte, Chis Chis, Las Barrancas, Tablillas, La Saladita, and the Avellaneda stretch of the Río de la Plata at orange, with Quilmes at yellow.
- Provincial authorities require sanitary flags at orange and red locations and advise against bathing, urging consultation with lifeguards and extra caution for children and pets.
- Official medical guidance warns that exposure can cause vomiting, diarrhea, headaches, muscle weakness, and skin reactions.
- The Cianosemáforo program fuses municipal field reports with satellite imagery analyzed by the Water Authority across 50 districts and operates within the UN’s EW4All initiative.
- Officials link the blooms to nutrient loading and seasonal conditions such as high temperatures, low wind, and strong sunlight that intensify eutrophication.