In this paper, we consider the uses of modular containerized desalination facilities in both emergency and temporary applications in remote and populated areas. These types of systems, while not new to the marketplace, are rapidly gaining prominence for numerous system designs by those wishing rapid deployment of complete units. With the considerations of the military and emergency management organizations forming some paramount reasons for this section of the industry, these sea or land transportable system designs are also highly useful for the temporary needs of the construction industry. The need for purified water for construction personnel as well as building material support may seem unrealistic, but the rise in projects in remote areas or areas without existing water supplies has given credence to these designs. These all-inclusive self-contained units can be quickly and economically erected on various types of sites, with only a water source and available power necessary for their function. Various designs and their implementation will be discussed, with modular pre-treatment and post-treatment options examined. Also, the modular approach to larger scale facilities will be addressed. Storage and transfer modules to contain and distribute the product of these systems will be featured as well. The usage of sophisticated control systems with modem capability, both cellular and land based, will be referred to in systems designed for use in remote areas. These systems might include a modular power generation unit as well as the water treatment modules to allow for a complete, stand alone system. Also, a design proposal for systems capable of handling many different qualities of feed water will be presented as a "universal" modular system. This type of system could be installed in any location, regardless of the feed water quality, and function to provide potable water for a shortterm situation.