Although the advancements in health and medical science has resulted to the eradication of some of the notorious microbial pathogens such as the bacillus that causes typhoid fever, new strains of microbes are also constantly appearing and posing new health risks to the public.
Problems regarding microbial contamination doesn't just happen with private water supplies such as a well. In the recent years, there have been a handful of instances in which an entire population of the town was struck by a disease due to pathogen that was able to contaminate the public water supply system.
If you are worried about your water supply, you can contact your water company to find out about the measures they are taking to make sure the water you are using is safe. If you have a private well as a water source, you need to have the water tested regularly.
There are available treatments for water contaminated by bacteria. There are so many types and strains of microbial pathogens that before applying a treatment, you have to find out first what exactly is the microbe that is contaminating your water. This is to ensure that the best possible treatment is used to deal with the problem.
There are also purification systems that are able to eradicate a wide range of bacteria and other microbes. A perfect example is the UVEX water purification system by Callidus that uses ultra-violet light to kill off all microbes in the water. However, in order water thus water purification system to be most effective, the water also has to be free from other contaminants such as manganese, iron and chalk. That is why the UVEX has to be used in combination with other filter systems.