Contents - GANGAPEDIA

City Development Plan for Allahabad Final Report
8.0 Sewerage and Sanitation
8.1 Present
Scenario
8.2 Wastewater
Collection &
Treatment
Sewerage system of Allahabad is very poor. The city as a whole does not have
sewerage system. Wherever exists, it is not an exclusive sewerage system. It is a
combined wastewater and storm water collection system. The collection system is
neither complete nor efficient. It exists only in the central core of Allahabad city
(sewerage district A & D).
Most of the existing sewers are old brick sewers which have outlived their design
life. The structural condition of sewers in most stretches is poor. Hydraulic
capacities are insufficient even for the present flows. All existing lines have
heavy silt depositions. Sewers are severely choked due to ingress of solid waste.
All lines have large variations in constructed slopes. Due to inadequacies of the
existing system, as described above, most of the city’s wastewater ends up in
surface drains which convey it to Ganga/ Yamuna rivers.
Unlined drains are found choked by garbage and solid wastes like polythene,
papers, wrappers etc. Wastewater flowing through the unlined drains is producing
foul smell in the city due to putrefaction of the organic matter and is polluting the
environment. Since the wastewater remains stagnant in the drains for 24 hours, it
is good place of breading for mosquitoes, flies and harmful bacteria and viruses.
This may cause unhygienic condition to the extent of epidemic in the city.
Condition of the existing system is also poor. During the reconnaissance survey
of the city, most of the sewerage system was found chocked by silt and garbage.
Solid materials lying in the sewerage lines restrict the flow. Cleaning and
maintenance of sewer lines is not proper. Due to silting of the solids in the line,
the carrying capacity gets drastically reduced and there develop chances of
overflow during the peak flows due to reduced section and carrying capacity of
the system. During the rainy season, situation in certain areas becomes serious for
these get flooded.
There is acute scarcity of wastewater treatment plant in the city and around 60%
wastewater meets the two rivers without treatment. The condition of the existing
pumping stations too is not good.
56 wards are covered with this system making it a 7047 ha of service area. A total
of 502.16 km length of sewer line is laid to cover the service area. Most of the
sewer system is however very old and already lived its design life. At present, a
total of 65,028 houses have access to the system. The city has been divided into 7
sewerage districts (Table 29; Figure 26) having an integrated sewerage system.
52