8. 6. LENGTH OF SEWAGE NETWORK AND THE NUMBER OF EXTENSIONS IN URBAN AREAS COVERED BY URBAN WATER AND SEWAGE COMPANIES

Year and urban water and sewage company	Length of the network with a diametre of 200 mm or more (km)	Number of extensions
1375 ...................................................................	9930	678906
1380 ...................................................................	17845	1409615
1381 ...................................................................	18243	1543285
1382 ...................................................................	21240	1849557
1383 ...................................................................	26544	2081232
1384...................................................................	28148	2346123
East Azarbayejan ......................................................	1745	168324
West Azarbayejan .....................................................	1806	134731
Ardebil ...................................................................	518	26825
Esfahan .................................................................	4685	410277
Ahvaz....................................................................	1556	168985
Ilam ......................................................................	358	14595
Bushehr .................................................................	369	15022
Tehran ..................................................................	2679	158267
Chaharmahal & Bakhtiyari ............................................	714	55801
South Khorasan ........................................................	89	5934
Khorasan-e-Razavi ....................................................	1400	108325
North Khorasan ........................................................	170	16742
Khuzestan ..............................................................	1876	90658
Zanjan ...................................................................	191	4683
Semnan .................................................................	122	2361
Sistan & Baluchestan...................................................	311	15321
Shiraz....................................................................	501	51657
Fars ......................................................................	355	13599
Qazvin ...................................................................	336	17396
Qom .....................................................................	388	23451
Kashan...................................................................	15	0
Kordestan ...............................................................	1046	154280
Kerman ..................................................................	65	0
Kermanshah.............................................................	1600	238974
Kohgiluyeh & Boyerahmad ............................................	125	3135
Golestan ................................................................	326	1922
Gilan .....................................................................	1603	176729
Lorestan ................................................................	564	96922
Mazandaran ............................................................	225	1213
Markazi ..................................................................	809	42446
Hormozgan .............................................................	320	20103
Hamedan ................................................................	969	93350
Yazd......................................................................	312	14095

Source: Water and Sewage Engineering Company.