The present study, involved in monitoring the parameter of Total Phosphorus at 08 points along the basin of the Indoche river, on a stretch of 70 km above basin from the mouth of the River Indoche on the Mayo River. The monitoring points were numbered from 01 to 08, being the point 01 the highest in the basin of the samplings considered, and the point 08, the lowest point of the basin, that is to say in the river mouth ofthe river fudoche in the Mayo River. There has been periodic monitoring in three hours of the day. A first monitoring at 06:30 hrs, another at 12:30 hrs anda third at 18:30 hrs, to contrast the concentrations of phosphates throughout the day. The results show that there is a variation of the Phosphates concentrations both point to point monitoring, as in the hour. These results indicate that as are monitored basin below, the phosphates concentrations are on the rise, thi...