Indian Standard For Drinking Water (IS 10500 : 2012)

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Drinking Water

Drinking water or Potable water is a water which meets water quality standards. It should not contain undesirable Substances, Toxic Substances, Radioactive Substances, Bacteria, Pathogens, Lead, harmful microbes and other harmful Substances.

On the earth surface, approximately 70% surface is covered by water, but from which only 2.8% water is potable or drinking, the rest of 97.2% water is saline. Everyone has the right to sufficient, acceptable, continuous, physically accessible, safe and affordable water for personal and domestic use.


Indian Standard For Drinking Water

Indian Standard For Drinking Water was adopted by the Bureau of Indian Standards (BIS). This standard prescribes the requirements and the methods of sampling and test for drinking water. Drinking water shall comply with the requirements given in Indian Standard For Drinking Water.

According to Indian Standard, Drinking water is a water which is intended for human consumption for drinking as well as for cooking purposes from any source. It includes water (treated or untreated) supplied by any means for human consumption.

Indian standard specifies the acceptable limit and the permissible limit in the absence of alternate source as shown below.

1. Organoleptic and Physical Parameters

CharacteristicAcceptable Limit
(mg/l)
Permissible Limit
in Absence of
Alternate Source
(mg/l)
Colour, Hazen units515
OdourAgreeableAgreeable
pH value6.5-8.5No relaxation
TasteAgreeableAgreeable
Turbidity, NTU15
Total dissolved solids5002000
Indian Standard For Drinking Water (IS 10500 : 2012)

2. General Parameters Concerning Substances Undesirable in Excessive Amounts

CharacteristicAcceptable Limit
(mg/l)
Permissible Limit
in Absence of
Alternate Source
(mg/l)
Aluminium (as Al)0.030.2
Ammonia (as total ammonia- N)0.5No relaxation
Anionic detergents (as MBAS)0.21.0
Barium (as Ba)0.7No relaxation
Boron (as B)0.51.0
Calcium (as Ca)75200
Chloramines (as Cl2)4.0No relaxation
Chloride (as Cl)2501000
Copper (as Cu)0.051.5
Fluoride (as F)1.01.5
Free residual chlorine0.21
Iron (as Fe)0.3No relaxation
Magnesium (as Mg)30100
Manganese (as Mn)0.10.3
Mineral oil0.5No relaxation
Nitrate (as NO3)45No relaxation
Phenolic compounds (as C6H5OH)0.0010.002
Selenium (as Se)0.01No relaxation
Silver (as Ag)0.1No relaxation
Sulphate (as SO4)200400
Sulphide (as H2S)0.05No relaxation
Total alkalinity as calcium carbonate200600
Total hardness (as CaCO3)200600
Zinc (as Zn)515
Indian Standard For Drinking Water (IS 10500 : 2012)

3. Parameters Concerning Toxic Substances

CharacteristicAcceptable Limit
(mg/l)
Permissible Limit
in Absence of
Alternate Source
(mg/l)
Cadmium (as Cd)0.003No relaxation
Cyanide (as CN)0.05No relaxation
Lead (as Pb)0.01No relaxation
Mercury (as Hg)0.001No relaxation
Molybdenum (as Mo)0.07No relaxation
Nickel (as Ni)0.02No relaxation
Polychlorinated biphenyls0.0005No relaxation
Polynuclear aromatic hydro- carbons (as PAH)0.0001No relaxation
Total arsenic (as As)0.010.05
Total chromium (as Cr)0.05No relaxation
Indian Standard For Drinking Water (IS 10500 : 2012)

Trihalomethanes

CharacteristicAcceptable Limit
(mg/l)
Permissible Limit
in Absence of
Alternate Source
(mg/l)
Bromoform0.1No relaxation
Dibromo- chloro- methane0.1No relaxation
Bromo- dichloro- methane0.06No relaxation
Chloroform0.2No relaxation
Indian Standard For Drinking Water (IS 10500 : 2012)

4. Parameters Concerning Radioactive Substances

CharacteristicAcceptable Limit
(Bq/l)
Permissible Limit
in Absence of
Alternate Source
(Bq/l)
Alpha emitters0.1No relaxation
Beta emitters1.0No relaxation
Indian Standard For Drinking Water (IS 10500 : 2012)

5. Pesticide Residues Limits

PesticideLimit
(µg/l)
Alachlor20
Atrazine2
Aldrin/ Dieldrin0.03
Alpha HCH0.01
Beta HCH0.04
Butachlor125
Chlorpyriphos30
Delta HCH0.04
2, 4- Dichloro phenoxy acetic acid30
DDT (o, p and p, p – Isomers of DDT, DDE and DDD)1
Endosulfan (alpha, beta, and sulphate)0.4
Ethion3
Gamma — HCH (Lindane)2
Isoproturon9
Malathion190
Methyl parathion0.3
Monocrotophos1
Phorate2
Indian Standard For Drinking Water (IS 10500 : 2012)

6. Bacteriological Quality of Drinking Water

OrganismsRequirements
All water intended for drinking:
a) E. coli or thermotolerant coliform bacteria
Shall not be detectable in any 100 ml sample
Treated water entering the distribution system:
a) E. coli or thermotolerant coliform bacteria
b) Total coliform bacteria
Shall not be detectable in any 100 ml sample
Treated water in the distribution system:
a) E. coli or thermotolerant coliform bacteria
b) Total coliform bacteria
Shall not be detectable in any 100 ml sample
Indian Standard For Drinking Water (IS 10500 : 2012)

FAQs :

What is Drinking Water ?

Drinking water or Potable water is a water which meets water quality standards. It should not contain undesirable Substances, harmful microbes, Radioactive Substances, Toxic Substances, Bacteria, Lead, Pathogens and other harmful Substances.

What is Indian Standard For Drinking Water ?

Indian Standard For Drinking Water was adopted by the Bureau of Indian Standards (BIS). This standard was originally published in 1983. This standard prescribes the requirements and the methods of sampling and test for drinking water. This standard specifies the acceptable limit and the permissible limit in the absence of alternate source.

Minimum TDS level in drinking water ?

The Bureau of Indian Standards (BIS) recommended 500 mg/l as the acceptable limit of TDS (Total Dissolved Solids) for drinking water. However, in absence of alternate source The BIS recommended 2000 mg/l as the permissible limit of TDS for drinking water.

Is code for drinking water standards ?

Indian Standard code For Drinking Water is IS 10500 : 2012


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