The standing charge for both tap water and waste water services will increase above inflation.
The sole States shareholder in Guernsey Water, the STSB, has lodged the legislation with the Greffe for inclusion in the December billet.
It proposes increasing the standing charge for tap water by 4.5% and the standing charge for wastewater by 4.1%.
The usage charge for drinking water will go up by 8.8%.
The wastewater usage charge also goes up for both domestic and business customers.
Inflation in Guernsey is currently 3.3%.
The STSB is also applying to vary mooring, airport and waste dumping charges.

New woodland for Alderney's 80th Homecoming
Guernsey States 'in talks' with easyJet
Guernsey's airline Aurigny takes on six new First Officers
Call for more transparency over Guernsey Electricity's charges
Guernsey Police investigate 'unexplained death' in St Peter Port
Senior Guernsey politician to stay on committee during police investigation
Iconic Guernsey restaurant to close before Christmas
Protected status of Guernsey bunker changed by planners