There is no doubt about the importance of water to life. All kind of life in this planet needs water to born and survive in a healthy way. So, it is a fact that if the water becomes poisoned, we are poisoned, if it is not potable, we will be sick. That is why we must take care about our water resources and we must do something immediately or life in Earth will be exterminated. It is not a single screaming. United Nations Climate Change conference has been talking about it for many years and each case scenario is getting worse year by year. The oceans, rivers and lagoons have got to be protected. And have many standards to prevent them from destruction but usually it is not successful. Specially at urban cities because there are many different interferences that achieve people s health. One of it is sewer. It goes into oceans, rivers and even into sources that are underground and sometimes without any kind of sewage treatment. It is very important to understand that sanitary sewers are composed of almost 90 percent of water; and that is the reason why if it is disposed back into sources without an effective cleaning process, it will contaminate all kind of water sources that exists until they reach unsupportable limits to life. And, when life finds too many difficulties to exist in a certain river or other source, it means that they are dead or useless. Sanitary sewer is composed of many things such as organic, metallic and nonmetallic elements and it is not right if someone thinks that contributes just with organic elements. When someone put away batteries, paints, deodorant, antiperspirantor electronics is cooperating to spoil environment. These things are poison to water, each one in different terms of cooperation, but equally danger to water and life itself.And how many of us are not worried about it? Not much. Human beings throw these things off frequently without even thinking about their act. But it is fact that each one of us isresponsiblefor providing environment protection.