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| Last Updated:: 18/09/2012

National status of waste water generation & treatment

 

As per the latest estimate out of 22,900 Mld of wastewater generated in the country, only about 5900 Mld (26%) is treated before letting out, the rest i.e., 17000 Mld is disposed of untreated. Twenty seven cities have only primary treatment facilities and forty-nine have primary and secondary treatment facilities. The level of treatment  available in cities with existing treatment plant varies from 2.5% to 89% of the sewage generated.

The total wastewater generated by the 299 class I cities is 16,662 Mld approximately 81% of the water supplied. The state of Maharashtra alone contributes about 23%, while Ganga river basin contributes about 31% of the waste generated. Only 74% of the total wastewater generated is collected. Out of 299 class I cities 160 cities have sewerage coverage for more than 75% of the population and 92 cities have between 50 and 75% of population coverage. On the  whole 70% of the population of class I cities are provided with sewerage facility. The type of sewerage system is either open or closed or piped.


Source: Status of sewage treatment plants in Ganga Basin, CPCB Publication, June 2003
 

 

Status on Sewage Generation in Metropolitan Cities, Class-I Cities and Class-II Towns:

 

Discharge of untreated sewage in water courses both surface and ground waters is the most important water polluting source in India. Out of about 38000 million liter per day of sewage generated treatment capacity exists for only about 12000 million liter per day. Thus, there is a large gap between generation and treatment of wastewater in India. Even the treatment capacity existing is also not effectively utilized due to operation and maintenance problem. Operation and maintenance of existing plants and sewage pumping stations is not satisfactory, as nearly 39% plants are not conforming to the general standards prescribed under the Environmental (Protection) Rules for discharge into streams as per the CPCB’s survey report.. In a number of cities, the existing treatment capacity remains underutilized while a lot of sewage is discharged without treatment in the same city. Auxiliary power back-up facility is required at all the intermediate (IPS) & main pumping stations (MPS) of all the STPs.

 

Status of Municipal Wastewater Generation and treatment capacity of Metropolitan Cities:

 

  • There are 35 metropolitan cities (more than 10 Lac Population), 15,644 Millions Liter Per Day (MLD) of sewage is generated from these metropolitan cities. The treatment capacity exists for 8040 MLD i.e. 51% is treatment capacity is created.

 

  • Among the Metropolitan cities, Delhi has the maximum treatment capacity that is 2330 MLD (30% of the total treatment capacity of metropolitan cities)
 
  • Next to Delhi, Mumbai has the capacity of 2130 MLD, which is 26% of total capacity in metropolitan cities.
 
  • Delhi and Mumbai therefore in combination have 55% of treatment capacity of the metropolitan cities.
 
  • Some cities such as Hyderabad, Vadodara, Chennai and Ludhiana and Ahemedabad treatment capacity meets the volume of generation.
 
  • Cities like Delhi, Dhanbad have more than 50% capacity, rest of the cities have the capacity less than 50%.

 

 

Status of sewage generation and treatment capacity in metropolitan cities

S. No.
Name of the city
Sewage
generation         
(in MLD)
Sewage Treatment
Capacity              
(in MLD)
Percent of
treatment
capacity
1
Hyderabad
426.21
593
100
2
Vishakhapatnam
134.99
-
-
3
Vijayawada
128.39
-
-
4
Patna
279.14
105
37
5
Delhi
3800
2330
61
6
Ahmadabad
472
488
96
7
Surat
432
202
46
8
Rajkot
108.8
44.5
40
9
Vadodara
180
206
100
10
Bangalore
771.75
-
-
11
Indore
204
78
38
12
Bhopal
334.75
22
6
13
Jabalpur
143.34
-
-
14
Mumbai
2671
2130
80
15
Pune
474
305
64
16
Nagpur
380
100
26
17
Nasik
227.84
107.5
47
18
Ludhiana
235.2
311
100
19
Amritsar
192
-
-
20
Jaipur
451.71
54
11
21
Chennai
158
264
100
22
Kanpur
417.35
171
41
23
Lucknow
363.81
42
11
24
Agra
260.36
88
33
25
Kolkata
705.86
172
24
26
Faridabad
164
65
39
27
Jamshedpur
199.43
-
-
28
Asansol
147
-
-
29
Coimbatore
120
-
-
30
Madurai
97.93
-
-
31
Meerut
177.05
-
-
32
Varanasi
230.17
102
44
33
Allahabad
176
60
34
34
Kochi
188.4
-
-
35
Dhanbad
192
-
-
 
Total
15644
8040
51

 Source: Status of sewage in India(CUPS/61/2005-06)- Central Pollution Control Board

 

 

State-wise sewage generation of Class-I Cities and Class-II Towns

 

 

S. No.
State/Union Territory
Sewage
generation   in class -1 Cities        
(in MLD)
 Sewage
generation   in class -1 towns        
(in MLD)
Total
(in MLD)
1
Andaman & Nicobar
12.00
-
12.0064
2
Andhra Pradesh
1760.60
217.59
1978.1996
3
Assam
380.14
6.46
386.6
4
Bihar
1009.7
107.42
1117.12
5
Chandigarh
429.76
-
58.2936
6
Chhattisgarh
350.47
40.82
391.29
7
Delhi
3800
-
3800
8
Goa
9.79
13.89
23.62
9
Gujarat
1680.92
227.55
1908.47
10
Haryana
626.69
43.52
670.212
11
Himachal Pradesh
28.94
-
28.94
12
Jammu & Kashmir
213.93
27.86
27.86
13
Jharkhand
830.47
78.21
908.68
14
Karnataka
1790.40
233.37
2023.778
15
Kerala
575.17
231.32
806.49
16
Madhya Pradesh
1248.72
130.9
1379.626
17
Maharashtra
9986.29
213.73
10200.02
18
Manipur
26.74
-
26.74
19
Meghalaya
20.84
11.25
32.09
20
Mizoram
5.712
-
5.712
21
Nagaland
13.62
1.36
14.984
22
Orissa
660.73
78.42
739.15
23
Pondicherry
56.46
7.984
64.444
24
Punjab
1528.26
157.40
1685.664
25
Rajasthan
1382.37
147.79
1530.16
26
Tamilnadu
1077.21
184.67
1261.88
27
Tripura
24
-
24
28
Uttar Pradesh
3506.01
345.70
3851.71
29
Uttrakhand
176.97
9.07
188.31
30
West Bengal
2345.21
180.42
2525.63
 
Total
35558.12
2696.70
38254.82

 

 

                   Source: CPCB reports (1978, 1988, 1995, 2006 and 2009)

 

                  Source: CPCB reports (1978, 1988, 1995, 2006 and 2009)