India is a vast country in terms of area, fast developing in South Asia, and 2nd largest population in the world. Uttar Pradesh (UP) is the 4th biggest province in terms of geography and largest populated province in India. It is categorized into East, West, North, and South. Western UP consists of six different divisions like Merrut, Saharanpur, Moradabad, Barelli, Agra, and Aligarh with the following districts Merrut, Bulandshashar, Gautam Buddh Nagar, Ghaziabad, Baghpat, Hapur Shaharanpur, Shamli, Muzaffarnagar Moradabad, Bijnor, Rampur, Amroha, Sambhal, Bareilly, Badaun, Frirozabad, Pilibhit, Shahjahanpur, Mainpuri, Mathura, Agra, Aligarh, Etah, Hathras, and Kasganj. Major cancer rivers running in this area are Yamuna, Kaali Nadi (Krishna), Hindon, and Ganga, these rivers turn to cancer rivers due to different industries that reside in this area, which are mainly sugar industries, pulp and paper mills, as well as slaughter houses. All these industries releasing its waste directly to the river results in the water obtaining many hazardous compounds; therefore river water becomes seriously polluted and turned to a cancer river. The industrial wastewaters contain hazardous inorganic chemicals, mainly heavy metals like Mercury (Hg) Lead (Pb) and (As). Continuing cumulative effects of heavy metals in the environment are harmful to the human health. Among heavy metals, Hg, Pb, and As are unneeded elements for biological metabolic functions, and are one of the most toxic contaminants or lethal to organisms even when absorbed in small amounts (
1,
2). Thus, the accumulation of these metals in soils can create a threat to food safety and is a potential health risk. Next, we all know about As, and how it is a villainous metalloid and their effect to human beings worldwide, it exists commonly in two forms, arsenite (As III) and arsenate (As V), both forms are toxic but arsenite (As III) is more mobile and toxic and its uptake is believed to occur passively through membrane aquaporins (
3,
4). Maximum contaminant level for Pb in the water should contain less than 0.05 parts per million of Pb, which is the (
5). Pb is also a poisonous element and is associated with several health hazards like anemia, reproductive effects (
6,
7). Hg is a unique metal having no any biological function and the contaminant level was set at 2 parts per billion. Increased uptake of Hg causes several disorders like cardiovascular collapse, acute renal failure, and severe gastrointestinal damage nephritis, anuria, and hepatitis (
8). Whereas, toxicity inactivate enzymes involved in DNA replication, DNA repair, nucleic acid, and phospholipid synthesis, and also inhibits energy flow (
9,
10). Consumption of contaminated food and water causes various types of cancer as well as a neurological disorder (
11-
13). In the present time, the maximum contaminant level in drinking water is 10 μg/L set by USEPA (
14). The above-discussed three metals are the major contaminant in these rivers. The necessity of this study is that thousand of nearby villagers have died in the last two years due to various types of cancers, mainly due to these metal contaminations. Therefore, it is needful to begin a systematic study and to investigate possible prevention and treatment measure.