Incidence of urban sewage disposal in the salt-ponds areas of the south of the Bay of Cadiz

The highest pollution indices in the marsh and tide-lands situated to the south of the Bay of Cadiz have been evaluated. At the present, the salt industry of this area is being transformed into mariculture installations. This study consisted of the systematic evaluation of different parameters at 26 sampling stations during the period 1976–1981. The results suggest that extensive zones are too seriously affected to make use of them as marine piscifactories.