Parameter Unit Method Desirable limit Maximum permissible limit Organization/Body Temperature oC Direct measurement. 30 34 - PH Acidity Alkalinity Ion analyzer EA 940. 7-8.5 6.5-9.2 WHO, ISI, ICMR TDS mg/l Gravimetric analysis. 500 1500 ICMR TSS mg/l Gravimetric analysis. <100 - ISI DO mg/l Winkler’s methods. >6 3.6 ICMR BOD5 mg/l Winkler’s methods. <5 - US Public Health value Coliform(MPN) Cells/100ml Multiple tube fermentation. <1 >10 ISI

Table 2: Recommended water quality criteria.