Way back in 1986, Rajiv Gandhi launched the Ganga Action Plan. But years later, after much water (sewage) and money have flowed down the river, it is as bad as it could get. Why are we failing, and what needs to be done differently to clean this and many other rivers? According to recent estimates by the Central Pollution Control Board (CPCB), faecal coliform levels in the mainstream of the river - some 2,500 kilometres from Gangotri to Diamond Harbour - remain above the acceptable level in all stretches, other than its upper reaches. Even in the highly oxygenated upper stretches, faecal coliform levels, though within acceptable levels, are increasing in places like Rudraprayag and Devprayag, suggesting inadequate flow for dilution.
Pollution hot spots, the mega- and fast-growing cities along the river, are grimmer. According to the CPCB's monitoring data, biochemical oxygen demand (BOD) levels are high downstream of Haridwar, Kannauj and Kanpur, and peak at Varanasi. But what is worrying is that pollution is getting worse in all the stretches. This is not surprising given that, all along this heavily populated stretch, freshwater intake from the river is increasing. Water is drawn for agriculture, industry and cities, but only waste is returned to the river. Over the years, funds allocated for cleaning the Ganga have been used to create infrastructure, without much attention to their use and efficacy. Most cities do not have the infrastructure to convey the sewage to the treatment plant; and most cities certainly do not have the money to run the plant.