Abstract: The present invention provides a self-contained, self-monitoring water purification system able to be transported to and used in remote areas. The system processes contaminated water through a preliminary filter, an oxidation contact chamber, a secondary filter and a chemical biocidal agent to obtain potable water. A number of sensor probes send information on critical operating parameters to a programmed logic control which, in turn, analyzes the information and generates an output signal to alter system operations when needed. In a second embodiment, the invention system is provided with a desalination unit in the form of a reverse osmosis filter to remove salt and extremely fine particles.