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This research was aimed to analyze the water suitability and environmental carrying capacity for seaweed (Eucheuma cottonii) cultivation business in Mandar Bay of West Sulawesi. The results of this research are expected to be a reference to consideration in the management of sustainable seaweed cultivation business. This research is an explorative research using the method of direct survey and measurement in the field.The data collected were analyzed spatially with geographic information system (GIS) approach and then outlined descriptively. Based on the spatial analysis results (overlay) of the water suitability for seaweed cultivation in Mandar Bay of West Sulawesi, it was obtained that the total water area in Polewali District reached 1,252.66 ha, covering the suitable water area of 65.39 ha and the conditionally suitable water area of 1,187.27 ha. If divided based on the subdistrict area, the water suitability area of the five coastal subdistricts in Polewali District respectively was as follows: 1) Polewali Subdistrict’s suitable water area of 13.16 ha (1.05%) with the water carrying capacity of 2.6 ha, the number of cultivation units reaching 5.2, and the production rate of 3.9 tons per year; 2) Wattang Subdistrict’s suitable water area of 0 ha (0%); 3) Lantora Subdistrict’s suitable water area of 11.3 ha (0.9%) with the water carrying capacity of 2.26 ha, the number of cultivation units reaching 4.52, and the production rate of 3.39 tons per year; 4) Takatidung Subdistrict’s suitable water area of 39.85 ha (3.18%) with the water carrying capacity of 7.97 ha, the number of cultivation units suitable to developed of 15.94, and the current production level of 11.95 tons per year; and 5) Manding Subdistrict’s suitable water area of 1.08 ha (0.09%) with the water carrying capacity of 0.22 ha, the number of cultivation units to be developed of 0.44, and the current production rate of 0.33 tons per year.

ANALYSIS OF SUITABILITY AND CARRYING CAPACITY OF WATERS FOR SEAWEED (EUCHEUMA COTTONII) CULTIVATION BUSINESS IN MANDAR BAY, WEST SULAWESI OF INDONESIA