Public network connection rate

%

64.2%

64.5%

64.9%

65.4%

65.6%

Sewerage network connection rate (**)

%

77.9%

78.3%

78.8%

78.9%

79.1%

Number of subscribers

1000 subscribers

2119

2157

2200

2257

2299

Wastewater volume

Million m³

312.5

317.5

318.5

311.0

313.4

Network length

Km

17729

17848

18038

18243

18437

Number of manholes

1000 manholes

1193647

1202710

1215184

1226433

1236440

Public sewerage network

Km

5966

5653

5600

5425

5385

Sewerage network rate

%

44.6%

41.9%

40.7%

38.9%

38.2%

Number of pumping stations

Station

812

815

824

837

841

Number of wastewater treatment plants (WWTP)

Station

123

125

125

127

127

Collected wastewater volume

Million m³

289.3

290.9

294.5

296.1

298.2

Treated wastewater volume in WWTPs

Million m³

286.8

288.5

292.1

292.8

295.7

Wastewater treatment rate

%

99.1%

99.2%

99.2%

98.9%

99.2%

Number of interventions on the network 

Intervention

115183

115045

109666

100828

111396

Number of interventions per km

Intervention/km

6.5

6.4

6.1

5.5

6.0