Centre for Science and Environment, New Delhi

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JALSWARAJ-
MAKING WATER EVERYBODYS BUSINESS
MAKING WATER EVERYBODYS BUSINESS
Centre for Science and Environment, New Delhi

• Centre for Science and Environment, New Delhi

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Once consisted of group of seven islands called
Colaba, Mazagaon, Old womans Island, Wadala,
Mahim, Parel and Matunga Sion.
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Vehar lake
Tulsi Lake
Tansa Dam
Vaitarna
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WHO GETS HOW MUCH

• BMC has extensive network
• BUT
• Distribution is not uniform.
• Suburban consumers have to supplement with
  tankersspending at least Rs 450 per day
• Also quality of tanker water is a major concern.

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The amount that goes unaccounted for About 20
to 25 per cent is lost in leakage and
pilferage.
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GROUNDWATER QUALITY
SEA WATER INTRUSION Colaba, Dharvi, Khar,
Anderi, Chembur, Malad etc.
INDUSTRIAL POLLUTION Greater mumbai area ( High
Nitrate, trace elements like Cu, Cr, Hg etc are
found in water)
Source Central Ground Water Board
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MIDDLE VAITARNA STILL WAITING FOR CLEARENCE
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And WASTAGEFLUSHED down the drain

• Only 20 per cent of the water is used for
  drinking, cooking
• Over 60 per cent is used for bathing, washing and
  flushing down the toilet. Important that our
  water toilets are still 10-12 litres per each
  pull of the chain.
• Literally, water down the drain
• ...80 potable water ends up as waste-water

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WE ALL LIVE DOWNSTREAM

• Only 24 per cent of the wastewater generated by
  urban India is treatedMumbai accounts for 23 per
  cent of the total amount produced
• The rest 76 per cent is disposed of into WATER
  BODIES (rivers, lakes etc) untreated
• These water bodies are the water sources for the
  cities in the down stream

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But, strangely the supply is almost FREE

• Water is cheapest in Delhi. 35 per KL as compared
  to production cost of Rs 6-7 per Kl.
• Mumbai is in a better position, the cost for
  domestic supply is Rs 2.25 per KL and the
  production cost is Rs 5.74 per KL
• In Indore the cost for domestic 2.00 per KL and
  the production cost is Rs 9.50 KL.
• Bangalore charges Rs 5-60 per KL and the
  production cost is Rs 13 per KL.

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WATER HARVESTING POTENTIAL OF MUMBAI
Area 437 sq kmts Annual avg .rainfall
2000 mm Potential - 2394.52 MLD Present water
supply 2900 MLD OptionsStoragerecycling and
recharge Even if we assume 70 of the area to
be developed, 50 of it to be roofed and we
collect 70 of the water falling over it, the
quantity of rainwater that can be harvested works
out to 589.34 MLD. This is a sizeable quantity
compared to water supply to Mumbai. It may also
be reminded that the Middle Vaitarna project is
for 455 MLD.
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SUCCESS STORIES IN MUMBAI
BEST BUS DEPOT
TATA INSTITUTE OF SOCIAL SCIENCE
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Basic concerns of a Mumbaikar

• Reclaimed land and threat of salinity. Quality of
  waterof both municipal supply and tankers
• Unequal distribution
• Wasteful consumption patternleading to
  overwithdrawal from sourcesheading for
  urban-rural conflict?
• Therefore, overall water management is the order
  of the daywith RWH as a key component

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Way AHEAD

• Create informed public opinionthe ALMs can play
  a key role here
• Training the real users
• Strict legislation

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Mumbai

• Mumbai Municipal Corporation has made rainwater
  harvesting (RWH) mandatory to the properties
  having plot area more than 1000 sq. mts.
• This condition will also be made applicable to
  existing buildings in near future.
• Recycling has been made compulsory for buildings
  having centralised A C plants.
• BMC will supply 90 LPCD instead of 135 lpcd to
  ensure RWH will supplement the gap.

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Role of the people..

• None of this will work unless.
• The citizens make rainwater harvesting their own
  business