Karnataka would soon amend the law to make rainwater harvesting mandatory for all
buildings in the city, official sources said. “The Bengaluru Water Supply and Sewerage
Board (BWSSB) Act will be amended soon to mandate all buildings across the city to
harvest and use rainwater by installing dual-pipe systems,” an official said after the
cabinet approved the amendment bill.
There was no official briefing after the cabinet meeting since the state session was
underway. Bengaluru, which is located at an elevation of over 3,000 feet above sea
level, relies heavily on the Cauvery River for water supply to its 1.2 crore residents.
To meet the demand and reduce the dependence on rivers and groundwater, rainwater
harvesting has been made mandatory for all new houses and office buildings in the
“Rainwater can be collected and used for gardening, washrooms, and other purposes
so that river water can be used wisely for drinking and cooking,” the official added.
Meanwhile, the state government signed a three-year agreement with multi-business
conglomerate ITC Ltd to create a watershed in ten lakh acres of land across the
According to an official statement, the partnership agreement is part of the state
government’s ‘watershed development for the drought-proofing program, which seeks
to cover 1.16 million acres of watershed area in 29 of the state’s 31 districts.
What is Rainwater Harvesting?
Rainwater harvesting is the process of collecting rainwater during the monsoon season
and storing it to be used during times of water shortage. In general, it is a method of
gathering and storing rainwater for human use.
Rainwater harvesting is better described as the process of collecting and storing
rainwater with the purpose of reusing it during the dry season or during a drought.
With rapid climatic changes, population growth, and an increase in global temperature,
there is a scarcity of drinking water in many countries across the world.
This is a global problem and needs a fast solution. The supply of freshwater cannot be
increased on this planet. So an alternative method must be sought out. One such
method is rainwater harvesting.
Advantages of Rainwater Harvesting
Some of the benefits of a rainwater harvesting system are listed below.
Helps in reducing the water bill.
Reduces the need for imported water.
Decreases the demand for water.
Encourages the conservation of both water and energy
Groundwater quality and quantity can be improved.
Does not require a filtration system for landscape irrigation.
This technology is simple to understand, easy to install & operate.
It reduces soil erosion, flooding, stormwater runoff, and pollution of surface water with pesticides, fertilizers, metals, and other contaminations.
It is an excellent source of water for drinking purposes and house gardening.
Karnataka Government planned buildings will have to implement a two-pipe system,
one for regular water and another that can be used for gardening, toilets, and other
purposes. The Bill, once passed, will be applicable to all new buildings, including
residential & office buildings also.