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India Cities Focus on Rainwater Harvesting to Provide Clean Drinking Water

India Rainwater CatchmentNational and local governments are creating new regulations and funding sources to increase water harvesting.

Many Indian cities lack sufficient water supplies. Urban growth is making it difficult and expensive to build the dams, pipelines and canals used in the modern era to supply cities with water. In comparison, rainwater harvesting systems are a low-cost, low-impact way for cities to increase supplies.

Rooftop rainwater harvesting systems are now mandatory for new buildings in 18 of India’s 28 states and four of its seven federally-administered union territories, according to India’s Press Information Bureau.

Because of falling groundwater tables and the cost of developing surface supplies, new government mandates and funding emphasize rainwater harvesting.

About 50 percent of the funds for India’s rural employment act are being used for water harvesting systems, said the Minister for Rural Development to the Press Trust of India.

A rule requiring all new buildings in Bangalore to incorporate water harvesting systems will be extended to all cities in Karnataka state next year, according to DNA India. The state is also considering a water bill rebate for citizens who install such systems in their houses.

Rainwater harvesting would provide Bangalore’s water needs for six months of the year, said the city’s water chief at a conference on urban water development last week.

Delhi’s water board has a program to provide technical support and financial incentives for residents and businesses wanting to install a system. The city’s government buildings are already required to have harvesting systems, according to the Tribune India.

Even though regulations are being enacted, making sure the rainwater systems are actually built is another matter. Mumbai’s water supply operator made it mandatory in 2002 for new buildings with an area of 1,000 square meters to have rainwater systems installed, but the rule has been poorly implemented because of a lack of monitoring, the Telegraph of India reported.

Most harvesting systems use a building’s rooftop as a catchment area. After the rain falls, it is channeled from gutters into pipes that lead to a storage tank. The captured water can be used for household use or for recharging groundwater.

A GlobeScan/Circle of Blue opinion survey in August 2009 found that Indian citizens consider water pollution and freshwater shortages the most serious environmental problems in the country.

Source: Press Information Bureau



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  3. […] India Cities Focus on Rainwater Harvesting to Provide Clean Drinking Water: The Indian government is now requiring all new buildings in 18 out of 28 of its states to have rainwater harvesting systems in an effort to support the needs of their booming population. […]

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  5. […] Water catchment systems are essential for areas with no other reliable water sources.Pakistan and India—two countries that contend with some of the worst effects of climate change—are overhauling […]

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