Palta Water Works (State Government)

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Palta Water Works was established in 18.. Barrackpore Trunk Road was constructed for laying water pipe line from Palta / Barrackpore to Kolkata. Kolkata City gets treated water from Palta Water Works and Garden Reach Water Works. On 19th November,2002 these Water Works have been named as Indira Gandhi Water Treatment Plant. This Water Treatment Plant has an area of 482 acres of land. Historically this Plant has grown up to present capacity of 200 Million Gallon.

Water
Treatment Process
Transmission
Transmission capacity
Boosting Pumping Stations
Quality
Year Capacity (in MGD)
2002-2004 220
2007 260

WATER TREATMENT PROCESS:

  1. Old process with detention, natural sedimentation & Slow Sand Filtration:

  2. Conventional treatment with Clarifiers:

  3.  Pulsating clarifier with Acquazur R.G. Filter:

TRANSMISSION:

After chlorination, the entire volume of water generating from Palta Water Works is then pumped to Tallah Pumping Station transmitted through C.I. / M.S. Pipes.

 

Transmission capacity :
The distance in between Indira Gandhi Water Treatment Plant and Tallah Pumping Station is about 22 KM. The filter water transmission mains are:
Sl No. Type of Transmission Main Capacity in MGD
1. 42 C.I. Gravity Pipe 8
2. 48/ C.I. Gravity Pipe (converted to pressure pipe) 32
3. 60 M.S. Riveted Pipe 65
4. 72 M.S. Welded Pipe 90
5. 62 M.S. Welded Pipe 70
Total transmission capacity: 265

Distribution to Boosting Pumping Stations:

From Tallah Pumping Stations, after further chlorination, filter water is distributed to the entire city through the following Booster Pumping Stations:

Sl. No. Name of the Booster Pumping Station Reservoir Storage capacity
1 Raja Subodh Mullick Square 6.0MG
2 Auckland Square 6.0MG
3 Mohammad Ali Square 3.0MG
4 Park Circus Maidan 4.0MG
5 Golf Green 40,000 G
 

QUALITY OF WATER:
Our Laboratory is well equipped with modern and sophisticated instruments to test Physical, Chemical & Bacteriological examination of raw and filter water.

A) Physical and Chemical Examination:
S1.No. Parameter Raw Water Filter Water Acceptable Limit Cause of Rejection
i) Turbidity in NTU 22 to 600 0.1 to 1.4 2.5 10
ii) Colour (unit on Platinum -- Transparent 5.0 25
Cobalt Scale)
iii) Taste -- Acceptable -- --
iv) Odour -- Odourless -- --
v) pH-Value 7.6 to 8.3 7.0 to 7.9 7.0 to 8.5 <6.5 or >9.2
vi) T.D.S. in ppm 100 to 198 10 1 to 197 500 1500
vii) T.H. in ppm 78 to 157 72 to 155 200 600
viii) Chlorides in ppm 6 to 14 6 to 14 200 1000
ix) Sulphates in ppm 12 to 28 17 to 28 200 400
x) Fluorides in ppm 0.01 to 0.018 BDL to 0.015 1.0 1.5
xi) Nitrates in ppm 0.115 to 0.271 0.002 to 0.008 45 45
xii) Calcium in ppm 20 to 42 20 to 40 75 200
xiii) Magnesium in ppm 5 to I 7 5 to 15 30 150
xiv) Iron in ppm 0.20 to 6.25 0.002 to 0.03 0.1 1.0
xv) Manganese in ppm 0.03 to 0.35 0.004 to 0.02 0.05 0.5
xvi) Copper in ppm 0.012 to 0.064 BDL to 0.01 0.05 1.5
xvii) Zinc in ppm 0.02 to 0.12 0.01 to 0.07 5.0 15.0
xviii) Arsenic in ppm 0.002 to 0.009 BDL to 0.005 0.05 0.05
xix) Cadmium in ppm BDL BDL 0.01 0.01
xx) Lead in ppm BDL BDL 0.1 0.1

B) Bacteriological Examination:
Parameter Raw Water Filter Water Acceptable Cause of
Limit Rejection
MPN(Coliform Count) 3,500 to MPN of Coliform Organisms in100 ml of water are found "Zero" i.e. 'Excellent' throughout the year. MPN(ColiformCount) offilter water-" Zero" MPN (ColiformCount) -more than 3
1,60,000

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