Factsheet

Urban Water Management Switzerland

Overview

Wastewater
Drinking Water

Wastewater (Status 2012)

Wastewater treatment plants

839 Wastewater treatment plants (> 1'000 Population Equivalents)
Ca. >3’385 small-scale treatment plants (< 1'000 Population Equivalents)
>35’000 Pre-treatment units (Industry)

95% connectivity to wastewater treatment plants

Sewerage:

49'000 km of public sewers
Ca. 42'000 km of private sewers
30% separate sewers and 70% combined sewers
200'000 ha of drained area

Replacement value

14∙10⁹ Fr. wastewater treatment plants
66∙10⁹ Fr. public sewers
40∙10⁹ Fr. private sewers

Annual costs 

1.0∙10⁹ Fr. for wastewater treatment
1.2∙10⁹ Fr. for public sewerage
1.0-1.2∙10⁹ Fr. for private sewers

Other data

Specific electricity consumption: 0.50 kWh_Electricitym^-3_water
Specific electricity consumption: 0.17 kWh_ElectricityPE^-1
Electricity consumption of all treatment plants: 1.7∙106 kWh per year

Drinking Water (Status 2012)

3000 water suppliers

Replacement value

Approx. 110∙10⁹ Fr. for private and public infrastructures

Annual costs (declared capital and operation costs)

0.6∙10⁹ Fr./a investments
0.7∙10⁹ Fr./a for operation and maintenance

Drinking water production (2011)

325 L per inhabitant and day
0.954∙10⁹ m³ per year

Drinking water consumption in households

142 L per inhabitant and day

Annual rain

1'460 L per m²
8'300'000 L per inhabitant