The river cross the large cities are succetable to a lot of antropogenic interference. That
modify the hidrologic and biotic structure. One of the interferences that act at the river is the
pollutant's emission. At Sorocaba River this kind of pollution modify the water's quality and
the reasons probably are high turbididity, use of the oxigen, ammonia nitrogen, albuminoid
nitrogen and dissolved oxygen. This alteration can be different for each studied place,
although there is diference in the kind and quality to the pollutant's emission in the each …