Mobile water treatment plants represent complex, portable systems designed to treat and purify water in locations where access to potable water is limited or non-existent. These devices are particularly useful in emergency situations, such as natural disasters, or in remote areas with insufficient drinking water infrastructure.

These plants employ various treatment technologies, such as filtration, reverse osmosis, ultraviolet disinfection, nanofiltration, ozone and ultraviolet radiation, allowing the effective removal of a wide range of contaminants including bacteria, viruses, sediments and chemical compounds.

Water reuse is a process that allows treated water to be used for purposes that do not require drinking water. Mobile water treatment plants facilitate this process, especially in areas where access to clean water is limited.

This process involves the collection of wastewater from domestic, industrial and agricultural sources, subjecting it to treatment for reuse. Common uses for reused water include agricultural irrigation, landscape irrigation, industrial cooling, and aquifer recharge.

The water reuse process contributes to conserving water resources, reducing dependence on freshwater sources and minimizing the environmental impact of wastewater discharge.

Since 2023, in California (United States) the parameters and processes for the supply of reclaimed water as drinking water have been established thanks to its approval in the California Code of Regulation T22.[1]​.

Mobile water treatment plants have diverse applications, from emergency situations such as natural disasters to providing drinking water in rural and remote areas with limited access.

Additionally, these plants can be used at outdoor events, such as festivals and concerts, to provide drinking water to attendees. It is increasingly common to see this type of plants inside maritime containers to facilitate their transportation. Water reuse and mobile water treatment plants are effective solutions for sustainable water management. By enabling the safe use of treated wastewater and providing access to clean water in remote areas, these technologies can play a crucial role in mitigating water scarcity and promoting environmental sustainability.