No of people supplied with drinking water

64

67

78

No of production units

4 170

 4 159

4652

Volume of water supplied (in m3) - billions

 -

 6,61

 7.671*

No of people connected to the wastewater system

44

50

53

No of water treatment plants

2 906

3 112

3156

Volume of municipal wastewater collected (m3) billions

 -

4,94

 5.57