The Jacuí Delta Environmental Protection Area (APAEDJ) is located in the municipalities of Porto Alegre, Canoas, Nova Santa Rita, Triunfo, Charqueadas and Eldorado do Sul and totals 22,826.39 ha, while the park totals 14,242 hectares.

According to the PEDJ: "The wetlands inside the park are part of a larger set of humid areas that, especially in the central area of Rio Grande do Sul, form a strip of marshes and floodplains in a westerly direction, reaching up to the Ibicuí River, next to the Uruguay River, and in the east, northeast and southeast directions form the system of marshes and lagoons of the coastal plain".

The urban centers of the municipalities of Triunfo, Eldorado do Sul and Charqueadas are located on the banks of the delta.

Urban areas are also found in Porto Alegre, in the islands of Flores, Grande dos Marinheiros and Pintada.

[6] The Jacuí Delta is polluted by sanitary sewage (mainly from the Gravataí River) and by industrial effluents (from the Caí and Sinos rivers) - coming from the historic leather and footwear manufacturing region near Novo Hamburgo and São Leopoldo.