WATER QUALITY STANDARD

Indian Standard

Drinking Water - Specification

IS 10500 : 1991

Technical Terms

• BIS (Bureau of Indian Standards)

• Desirable limits

• Permissible limit

• PPM

• NTU

• Hazen Units

Filtration, Distillation, Reverse osmosis, OzonisationTreatment

Tannins, Iron, Copper, ManganeseNatural deposits

Sources

Visible tint, acceptance decreasesRisks or effects

Desirable : 5 Hz. , Permissible : 25 Hz.IS 10500-1991

Colour, Hazen Units

Activated carbon, Air stripping, oxidation, FiltrationTreatment

Chlorine, Hydrogen sulfide, Organic matter, Septic contamination, Methane gas

Sources

Rotten egg, Musty, ChemicalRisks or effects

UnobjectionableIS 10500-1991

Odour

Increase pH by soda ashDecrease pH with white vinegar / citric acid

Treatment

Natural Sources

Low pH - corrosion, metallic tasteHigh pH – bitter/soda taste, deposits

Risks or effects

Desirable :6.5 – 8.5, Permissible :No relaxationIS 10500-1991

pH

Reverse Osmosis, Distillation, deionization by ion exchangeTreatment

Livestock waste, septic system Landfills, nature of soil Hazardous waste landfills Dissolved minerals, iron and manganese

Sources

Hardness, scaly deposits, sediment, cloudy colored water, staining, salty or bitter taste, corrosion of pipes and fittings

Risks or effects

Desirable : 500 mg/l , Permissible : 2000 mg/lIS 10500-1991

Total Dissolved Solids (TDS)

Desirable :300 mg/l , Permissible : 600 mg/lIS 10500-1991

Water Softener Ion Exchanger , Reverse OsmosisTreatment

Dissolved calcium and magnesium from soil and aquifer minerals containing limestone or dolomite

Sources

Scale in utensils and hot water system, soap scumsRisks or effects

Hardness

Neutralizing agent Treatment

Pipes, landfills Hazardous waste landfills

Sources

Low Alkalinity (i.e. high acidity) causes deterioration of plumbing and increases the chance for many heavy metals in water are present in pipes, solder or plumbing fixtures.

Risks or effects

Desirable : 200 mg/l , Permissible : 600 mg/lit IS 10500-1991

Alkalinity

Oxidizing Filter , Green-sand Mechanical FilterTreatment

Leaching of cast iron pipes in water distribution systems Natural

Sources

Brackish color, rusty sediment, bitter or metallic taste, brown-green stains, iron bacteria, discolored beverages

Risks or effects

Desirable : 0.3 mg/l , Permissible : 1.0 mg/lIS 10500-1991

Iron, Fe

Ion Exchange , Chlorination, Oxidizing Filter , Green-sand Mechanical Filter

Treatment

Landfills Deposits in rock and soil

Sources

Brownish color, black stains on laundry and fixtures at .2 mg/l, bitter taste, altered taste of water-mixed beverages

Risks or effects

Desirable : 0.1 mg/l , Permissible : 0.3 mg/lIS 10500-1991

Manganese, Mn

Ion Exchange , Distillation , Reverse Osmosis Sulphate Treatment

Animal sewage, septic system, sewage By-product of coal mining, industrial waste Natural deposits or salt

Sources

Bitter, medicinal taste, scaly deposits, corrosion, laxative effects, "rotten-egg" odor from hydrogen sulfide gas formation

Risks or effects

Desirable : 200 mg/l, Permissible : 400 mg/lIS 10500-1991

Sulphate, SO4

Ion Exchange, Distillation, Reverse Osmosis Treatment

Livestock facilities, septic systems, manure lagoons, fertilizers Household waste water, fertilizers FertilizersNatural Deposits

Sources

Methemoglobinemia or blue baby disease in infantsRisks or effects

Desirable : 45 mg/l, Permissible : 100 mg/litIS 10500-1991

Nitrate, NO3-

Reverse Osmosis , Distillation, Activated Carbon Treatment

FertilizersIndustrial wastes Minerals, seawater

Sources

High blood pressure, salty taste, corroded pipes, fixtures and appliances, blackening and pitting of stainless steel

Risks or effects

Desirable : 250 mg/l , Permissible : 1000 mg/lIS 10500-1991

Chloride, Cl

Activated Alumina, Distillation, Reverse Osmosis, Ion Exchange

Treatment

Industrial waste Geological

Sources

Brownish discoloration of teeth, bone damageRisks or effects

Desirable : 1.0 mg/l, Permissible : 1.5 mg/lIS 10500-1991

Fluoride, F

Activated Alumina Filtration, Reverse Osmosis, Distillation, Chemical Precipitation, Ion exchange, lime softening

Treatment

Previously used in pesticides (orchards)Improper waste disposal or product storage of glass or electronics, Mining Rocks

Sources

Weight loss; Depression; Lack of energy; Skin and nervous system toxicity

Risks or effects

Desirable: 0.05 mg/l Permissible: No relaxationIS:10500-1991

Arsenic, As

Ion Exchange, Reverse Osmosis, DistillationTreatment

Septic systems Industrial discharge, mining sites Geological

Sources

Skin irritation, skin and nasal ulcers, lung tumors, gastrointestinal effects, damage to the nervous system and circulatory system, accumulates in the spleen, bones, kidney and liver

Risks or effects

Desirable : 0.05 mg/l, Permissible : No relaxation IS 10500-1991

Chromium, Cr

Ion Exchange, Reverse Osmosis, DistillationTreatment

Leaching from copper water pipes and tubing, algae treatment Industrial and mining waste, wood preservatives Natural deposits

Sources

Anemia, digestive disturbances, liver and kidney damage, gastrointestinal irritations, bitter or metallic taste; Blue-green stains on plumbing fixtures

Risks or effects

Desirable : 0.05 mg/l, Permissible : 1.5 mg/lIS 10500-1991

Copper, Cu

Ion Exchange, Reverse Osmosis, Chlorination Treatment

Fertilizer Electronics, steel, plastics mining Sources

Thyroid, nervous system damageRisks or effects

Desirable : 0.05 mg/l, Permissible : No relaxationIS 10500-1991

Cyanide

Ion Exchange, Activated Carbon , Reverse Osmosis, DistillationTreatment

Paint, diesel fuel combustionPipes and solder, discarded batteries, paint, leaded gasolineNatural deposits

Sources

Reduces mental capacity (mental retardation), interference with kidney and neurological functions, hearing loss, blood disorders, hypertension, death at high levels

Risks or effects

Desirable : 0.05 mg/l, Permissible : No relaxationIS 10500-1991

Lead, Pb

Reverse Osmosis, Distillation Treatment

Fungicides Batteries, fungicides Mining, electrical equipment, plant, paper and vinyl chloride Natural deposits

Sources

Loss of vision and hearing, intellectual deterioration, kidney and nervous system disorders, death at high levels

Risks or effects

Desirable : 0.001 mg/l, Permissible : No relaxationIS 10500-1991

Mercury, Hg

Ion Exchange Water Softeners, Reverse Osmosis, DistillationTreatment

Leaching of galvanized pipes and fittings, paints, dyes Natural deposits

Sources

Metallic tasteRisks or effects

Desirable :5 mg/l, Permissible : 15 mg/lIS 10500-1991

Zinc, Zn

Chlorination , Ultraviolet, Distillation, Iodination Treatment

Livestock facilities, septic systems, manure lagoons Household waste waterNaturally occurring

Sources

Gastrointestinal illnessRisks or effects

95% of samples should not contain coliform in 100 ml10 coliform / 100ml

IS 10500-1991

Total Coliform Bacteria

Chlorination , Ultraviolet, Distillation, Iodination Treatment

Livestock facilities, septic systems, manure lagoons Household waste waterNaturally occurring

Sources

Gastrointestinal illnessRisks or effects

Nil / 100mlIS 10500-1991

E.coliform Bacteria

HEALTH EFFECTS OF CHEMICAL PARAMETERS

Poor taste, color and turbidity; staining; black slime0.3Manganese

Poor or sometimes bitter taste, color and turbidity; staining of clothes materials; iron bacteria causing slime

1.0Iron

Poor lathering and deterioration of clothes; with sulfate laxative

100Magnesium

Poor lathering and deterioration of the quality of clothes; incrustation in pipes; scale formation

200Calcium

Poor lathering with soap; deterioration of the quality of clothes; scale forming; skin irritation; boiled meat and food become poor in quality

600 mg/LHardness

Boiled rice turns yellowish600 mg/LAlkalinity

Affects mucous membrane; bitter taste; corrosion; affects aquatic life

6.5-8.5PH

Undesirable taste; gastro intestinal irritations; corrosion or incrustation

2000 mg/LTotal dissolved solids

General & Health effectBIS Guideline value (maximum allowable)

Parameter

General & Health effectBIS Guideline value (maximum allowable)

Parameter

Dental and skeletal fluorosis; non-skeletal 1.5Fluoride

Taste affected; corrosive1000Chloride

Taste affected; laxative effect; gastro intestinal irritation400Sulfate

Blue baby disease (methemoglobineamia); algal growth100Nitrate

Forms nitrosoamines which are carcinogenic -Nitrite

Indicates pollution; growth of algae-Ammonia

Astringent taste; opalescence in water; gastro intestinal irritation; vomiting, dehydration, abdominal pain, nausea and dizziness

15Zinc

Liver damage; mucosal irritation, renal damage and depression; restricts growth of aquatic plants

1.5Copper

Neurological disorders; Alzheimer's disease0.2Aluminum

HEALTH EFFECTS OF CHEMICAL PARAMETERS

General & Health effect

BIS Guideline value (maximum allowable)

Parameter

Undesirable foaming-Detergent

Affects central nervous system0.001Pesticide

Carcinogenic; ulcerations, respiratory problems and skin complaints

0.05Chromium

Causes plumbism-tiredness, lassitudes, abdominal discomfort, irritability, anaemia; bio-accumulation; impaired neurological and motor development, and damage to kidneys

0.05Lead

Highly toxic; causes 'itai-itai' disease-painful rheumatic condition; cardio vascular system affected; gastro intestinal upsets and hyper tension

0.01Cadmium

Highly toxic; causes 'minamata' disease-neurological impairment and renal disturbances; mutagenic

0.001Mercury

Toxic; bio-accumulation; central nervous system affected; carcinogenic

0.05Arsenic

Algal growth-Phosphate

HEALTH EFFECTS OF CHEMICAL PARAMETERS