 Because of the high population density of Varanasi and the increasing number of tourists , the Uttar Pradesh government and international non @-@ governmental organisations and institutions have expressed grave concern for the pollution and pressures on infrastructure in the city , mainly the sewage , sanitation , and drainage components . Pollution of the Ganges is a particular source of worry because of the religious significance of the river , the dependence of people on it as a source of drinking water , and its prominence as a symbol of Varanasi and the city itself . The sewage problem is exacerbated by the role of the Ganges in bathing and in river traffic , which is very difficult to control . Because of the sewage , people using local untreated water have higher risk of contracting a range of water @-@ borne stomach diseases . 
 Because of the high population density of Varanasi and the increasing number of tourists , the Uttar Pradesh government and international non @-@ governmental organisations and institutions <a href='been_done' title='1'><mark>have</mark></a> expressed grave concern for the pollution and pressures on infrastructure in the city , mainly the sewage , sanitation , and drainage components . Pollution of the Ganges <a href='drop_aux' title='2'><mark>is</mark></a>a particular source of worry because of the religious significance of the river , the dependence of people on it as a source of drinking water , and its prominence as a symbol of Varanasi and the city itself . The sewage problem is exacerbated by the role of the Ganges in bathing and in river traffic , which <a href='drop_aux' title='3'><mark>is</mark></a>very difficult to control . Because of the sewage , people using local untreated water <a href='got' title='4'><mark>have</mark></a> higher risk of contracting a range of water @-@ borne stomach diseases . 
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