The Yamuna's black, foaming water has long been an embarrassment to the Indian Government. More than $1.2 billion has been spent on sewage treatment plants, toilets and waste pipes and plans have been drawn up to transform the river from a large latrine into an urban parkland with waterside paths and playgrounds.
But the Indian Parliament's standing committee on urban development said in a report: "[The] Yamuna is dirtier than ever even after a huge amount of rupees - 6500 crore ($1.24 billion) - has already been spent to clean the river. The committee came to know that more than 1500 crore has been spent on cleaning the Yamuna River in the last two decades under the Yamuna Action Plan. By now, the Yamuna's water - polluted and black - should have been cleaner. However, that has not happened."
The committee called on the Government to speed up work on new interceptor pipes to take waste from the capital to sewage treatment plants before being returned to the Yamuna. It also highlighted the drying up of tributaries and said less water should be diverted into canals to increase the flow - much of the solid waste that makes Delhi smell would be washed away if the river flowed faster.
Manoj Mishra, a leading environmentalist and campaigner to save the river, said officials had created the problem by allowing so much of the Yamuna's water to be diverted into canals. Haryana state took 60 per cent before it reached New Delhi, the capital drew 10 per cent and Uttar Pradesh, India's most populous state, took 20 per cent. The remaining 10 per cent was "100 per cent sewage, waste water, an industrial cocktail in the city", Mishra said.