Delhi | Centre for Science and Environment

Delhi


BIS standards for drinking water

he BIS drinking water specification (IS 10500:1991), which is a voluntary standard, was drawn up in 1983. It was last revised 17 years ago. A revision initiated in 2003, is still in its draft stage.

Warning signal

By: Vibha Varshney

Telecom service providers’ study shows mobile phone towers are safe. But are they?

Experience Sharing Dialogue in Dhaka: Improving Quality and Performance of Natural Gas Vehicle Program in South Asia

Dhaka and Delhi met to discuss natural gas vehicle programme -- a unique opportunity for a clean up in the region where the mainstream technology of diesel and petrol are languishing. CSE-DOE event enthused all for a more robust CNG strategy for cleaner air.

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Dhaka and Delhi met to discuss natural gas vehicle programme -- a unique opportunity for a clean up in the region where the mainstream technology of diesel and petrol are languishing. CSE-DOE event enthused all for a more robust CNG strategy for cleaner air.

CSE Press Note: Clean air before the Games: Are we living up to it?

  • CSE releases the results of its latest assessment of pre-Commonwealth air quality and air pollution control measures 
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May 10, 2010 
Delhi needs a combination of long lasting reforms as well as a contingent plan to clean up its air before the 2010 Commonwealth Games, says CSE analysis.

Press release: Studies say rising mercury levels could be connected to global warming

  • 2009 warmest year ever recorded for India

  • Globally, 11 out of 12 years (from 1995 to 2006) rank among the 12 warmest years on record since 1850

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April 12, 2010
The summer of 2010 has just begun, and India is already reeling under extreme temperatures as the mercury climbs unprecedented heights.

How to Clean the Yamuna

While the Delhi government has been debating on what needs to be done to clean the river, the pollution levels have only worsened.

In its book Sewage Canal: How to Clean the Yamuna, published in 2007, the Centre for Science and Environment reported that the Delhi stretch of the river is not only dead but had an overload of coliform contamination. Two years later, the pollution data shows no respite to the river.

The 22-km stretch of the Yamuna, which is barely 2 per cent of the length of the river basin, continues to contribute over 80 per cent of the pollution load in the entire stretch of the river. There is also no water in the river for virtually nine months. Delhi, impounds water at the barrage constructed at Wazirabad where the river enters Delhi. What flows in the river subsequently is only sewage and waste from Delhi’s 22 drains. In other words, the river ceases to exist at Wazirabad. 

This also means that there is just no water available to dilute the waste. The issue of a basic minimum flow in the river has been discussed time and again, but with water becoming more and more scare and contested, Delhi’s upstream neighbours are reluctant to release water. Delhi itself is water greedy and sucks up each  drop that is released as its share. The river is then reduced to a drain for the filth and waste of the city’s inhabitants.

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While the Delhi government has been debating on what needs to be done to clean the river, the pollution levels have only worsened. 
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