Water is used to satisfy basic needs, the quality of life of the population get a damage due to the pollution. It has used indicators of microbiological contamination, to ensure its quality and prevent the spread of disease. The aim of this project is to determine the bacteriological (total coliform and Escherichia coli) of water used for consumption in residents of the village Naples, Ponchos and Sevastopol Tequendama San Antonio to determine if it is unfit for human consumption . The methodology included a sample of five points of the distribution network, once a month for three months, processing samples by the membrane filtration method to determine the amount of UFC/100mL of total coliforms and E. coli.The results show that the water study is not fit for human consumption because in different months of sampling points were found the presence of total coliform and E. 100% coli in 86.6%, which suggests that these indicators are in a higher rate as established by the regulations. Some of the microorganisms identified are Citrobacter sp, Enterobacter sp, Klebsiella sp, Escherichia coli and the others as Hafnia sp., Arizona sp. and Serratia sp, which also cause disease. It developed a risk map for understanding the causes of contamination in the distribution network also was done a feedback with the community about water pollution.

The Mata de Palma wetland, located in the department of Cesar, Colombia, is being affected by the different productive activities that are performed in the area, which has altered ecosystem function. This represents wetland depletion and degradation due to deforestation, entry of waste water, changing water regimes and the use of inappropriate methods of exploitation of fish, which deplete natural resources, causing poverty in the population. When used as a means of disposal of excreta and other organic wastes, water is a source of transmission of many microorganisms, prevailing those of intestinal origin. It is for this reason that health checks are done based on the presence of total coliform, fecal coliform and Enterococcus. From the microbiological point of view, consideration of the sanitary quality of water is designed to determine the presence of certain groups of bacteria, which are indicative of fecal contamination or organic matter. The counts of faecal pollution indicators showed that the water is unfit for human consumption or for recreational use. In this swamp were identified a variety of microorganisms that show bacterial diversity, which can be used in biotechnology and biological indication and medical interest, as they affect human health and other organisms.

This study determined whether the drinking water in urban areas in the municipality of Cundinamarca Bojacá, met the physical, chemical and microbiological criteria established in Resolution 2115 of 2007 To this end, there were two samples from different parts of the distribution system, natural sources and storage tanks at home. Photometric, electrometric and volume methods were used in the respective physical and chemical analysis; additionally for microbiological parameters was used the membrane filtration technique. The results showed that most samples did not meet the minimum permissible value of free residual chlorine, therefore, according to the Risk Index Water Quality Water for human consumption (IRCA), are classified as non-unfit for human consumption. However, other microbiological parameters were met including the parameters set out in Resolution 2115 of 2007. Water quality must be maintained throughout the distribution system. Therefore, in addition to carrying out the treatment processes, the service provider must keep a strict control of the factors that may affect water quality.

Water is a main source of contamination in dental patients, classified into two classes: the first from the primary water supply, (ie,public water) and the second one, which is attached to the hoses walls of the dental unit, forming a biofilm. Due to stagnation of oral fluids are aspirated during the procedure. The biofilm will be continuously polluting the hoses from the unit and expelling microorganisms to the patient’s oral cavity where they generate aerosols that can contaminate the environment, surfaces, instruments and health personnel, which is a public health risk. In Colombia there are not official reports or data to control this public health problem, so the risk of bacterial contamination and infection are still latent today.