Water produced by reverse osmosis may be used for a variety of purposes, including desalination, wastewater treatment, concentration of contaminants, and the reclamation of dissolved minerals.
Reverse osmosis plants require a variety of pre-treatment techniques including softening, dechlorination, and anti-scalent treatment.
[4] In 1977 Cape Coral, Florida became the first municipality in the United States to use the RO process on a large scale with an initial operating capacity of 11,356 m³ (3 million gallons) per day.
By 1985, due to the rapid growth in population of Cape Coral, the city had the largest low pressure reverse osmosis plant in the world, capable of producing 56,782 m³ (15 million gallons) per day.
[14] Perth is an ideal candidate for reverse osmosis plants as it has a relatively dry and arid climate where conventional freshwater resources are scarce, yet it is surrounded by ocean.