1. Class A: Drinking water source without conventional treatment but after disinfection. 2. Class B: Outdoor bathing (organized). Class A-Criteria Designated for best use for the supply of drinking water from supply before cleaning and after normal treatment with chlorination is given by Central Pollution Control Board (CPCB) India is that the total number of Total Coliforms Organism MPN/100ml not more than 50, The pH range between 6.5 and 8.5, Dissolved Oxygen more than 6 mg/l, The Biochemical Oxygen Demand 5 days 20C less than 2mg/l. Class B-Criteria Designated for best use for the Bathing outdoor (arranged) given by Central Pollution Control Board (CPCB) India is that the total number of Total Coliforms Organism MPN/100ml not more than 500, The pH range between 6.5 and 8.5, Dissolved Oxygen more than 5mg/l, The Biochemical Oxygen Demand 5 days 20C less than 3mg/l less. Class C-Criteria designated for best use as the Source of drinking water with regular clearing and purification method. The criteria given by Central Pollution Control Board (CPCB) India is that the The total number of Total Coliforms Organism MPN/100ml not more than 5000, The pH range between 6.5 and 9, Dissolved Oxygen more than 4mg/l, The Biochemical Oxygen Demand 5 days 20C less than 2mg/l. Class D-Criteria Designated for best use for the Wild life and fisheries propagation, it is given by Central Pollution Control Board (CPCB) India is the pH range between 6.5 and 8.5, Dissolved Oxygen more than 4mg/l, Free Ammonia less than 1.2mg/l Class E-Criteria designated for best use for Monitored waste disposal, irrigation, Industrial cooling. The criteria given by Central Pollution Control Board (CPCB) India states that, the pH range should be in between 6.5 and 8.5 and the Electrical Conductivity should be Max.2250 at 25C micro mhos/cm Sodium absorption Ratio Max.26 Boron max. 2mg/l. UTTARAKHAND POLLUTION CONTROL BOARD, Government of Uttarakhand. Designated Best Use Water Quality Criteria as per standard according to its class A,B,C,D, E as: Class A-Criteria Designated for best use for the supply of drinking water for Drinking water from supply before cleaning and after normal treatment is the total number of Total Coliforms Organism MPN/100mlnot more than 50, The pH range between 6.5 and 8.5, Dissolved Oxygen more than 6 mg/l, The Biochemical Oxygen Demand 5 days 20C less than 2mg/l. Class B-Criteria Designated for best use for the supply of drinking water for Bathing outdoor (arranged) as the total number of Total Coliforms Organism MPN/100ml not more than 500, The pH range between 6.5 and 8.5, Dissolved Oxygen more than 5mg/l, The Biochemical Oxygen Demand 5 days 20C less than 3mg/l less Class C-Criteria Designated for best use for the supply of drinking water for Source of drinking water with regular clearing and purification method given as The total number of Total Coliforms Organism MPN/100ml not more than 5000, The pH range between 6.5 and 9, Dissolved Oxygen more than 4mg/l, The Biochemical Oxygen Demand 5 days 20C less than 2mg/l. Class D-Criteria designated for best use for the supply of drinking water for Wild life and fisheries propagation as the pH range between 6.5 and 8.5, Dissolved Oxygen more than 4mg/l, Free Ammonia less than 1.2mg/l. Class E-Criteria Designated for best use for the supply of drinking water for Monitored waste disposal, irrigation, Industrial cooling for the The pH range between 6.5 and 8.5, electrical conductivity should be max.250 at 25C micro mhos/cm sodium absorption Ratio Max.26 Boron Max. 2mg/l. International norms on water quality and human health is produces by WHO in the form of guidelines that are utilizing for regulating and standard setting, in developing and developed countries worldwide. technique, stream rate, complete hardness as CaCO3 through EDTA titration, bicarbonate by means of corrosive base titration, conductivity utilizing a conductivity meter, temperature with a thermometric technique, calcium, iron, potassium, magnesium, sodium, manganese utilizing fire AAS, chloride, phosphate, sulfate through particle chromatography, and ammonium, nitrate, nitrite through spectrophotometry. evaluated the surface water nature of the Fuji Stream bowl west of Mount Fuji, Japan in 2006 utilizing multivariate factual procedures. They estimated release with a flow meter, temperature with a mercury thermometer, disintegrated oxygen (DO) utilizing Winkler azide technique, biochemical oxygen interest (Body) utilizing Winkler azide strategy, synthetic oxygen interest (COD) through potassium permanganate, pH with a pH meter, all out suspended solids (TSS) by drying at 103 to 105 degrees C, electrical conductivity (EC) with electrometric strategy, all out coliforms (TC) utilizing the various cylinder technique, nitrate nitrogen (NO3-N) by means of particle chromatography, ammoniacal nitrogen (NH4-N) with phenate strategy, and inorganic broke up phosphorus (PO4-P) with ascorbic corrosive strategy. The studies assessed hazardous chemicals and metals in various rivers, including TDS, Ammonia-N, Chloride, Sulphate, COD, BOD, Electrical Conductivity, Alkalinity, Total Hardness, temperature, E. coli, pH, Dissolved Oxygen, and Turbidity. Seasonal fluctuations were analyzed and compared to CPCB, ISI, and WHO standards for freshwater. Findings indicate that urbanization, industrialization, human activities, agriculture, irrigation, households, livestock, and domestic waste significantly degrade river water quality. The water is generally poor and unsuitable for human consumption and other uses. Improving water quality requires restricting untreated sewage and industrial effluents, penalizing solid waste disposal in rivers, and promoting wastewater treatment, reuse, and recycling. Continuous monitoring of river water quality is essential to manage future changes effectively.