The cost of seawater desalination ranges between $5 and $10 per 1,000 gallons. This means that the cost per gallon of seawater desalination is approximately $0.005 to $0.01.

In large municipal seawater desalination plants, the cost of desalinating one cubic meter of water is typically around $0.50 - $1.00. The cost per liter of water is approximately US$0.0005 - US$0.001.

Desalination plant cost is dependent on your water source, reverse osmosis system design and selected brands.