Physical Parameters of water as per BIS:10500:2012

Characteristic	Requirement (Acceptable Limit)	Permissible Limit in the Absence of Alternate Sources
Colour, Hazen units, Max	5	15
Odour	Agreeable	Agreeable
pH value	6.5-8.5	No relaxation
Taste	Agreeable	Agreeable
Turbidity, NTU, Max	1	5
Total Dissolved solids, mg/l	500	2000
Total Alkalinity as calcium carbonate, mg/l, max	200	600
Total Hardness (as CaCO3) mg/l, max	200	600
Calcium (as Ca), mg/l, Max	75	200
Magnesium (as Mg), mg/l, Max	30	100
Chloride (as Cl), mg/l, Max	250	1000
Nitrate (as NO3), mg/l, Max	45	No relaxation
Sulphate (as SO4), mg/l, Max	200	400
Fluoride (as F) mg/l, Max	1.0	1.5
Free residual chlorine, mg/l, Min	0.2	1
Iron (as Fe), mg/l, Max	0.3	No relaxation
Manganese (as Mn), mg/l, Max	0.1	0.3
Aluminium (as Al), mg/l, Max	0.03	0.2