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.