Egypt has raised the price of piped drinking water by up to 45%.
Saturday's decision has been published in the country's official gazette.
The rise also includes a 12% increase in fees for sewage treatment.
Egypt raised the price of drinking water and sewage treatment by up to 50% in August.
The decision comes as the government presses ahead with an economic reform program that has included slashing fuel and electricity subsidies, imposing a value-added tax and a currency floatation. The measures were taken in order to qualify for a three-year $12bn bailout loan from the International Monetary Fund, which it secured in 2016.