[Drinking Water Requirements Desirable.]

INDIAN STANDARD SPECIFICATIONS FOR DRINKING WATER IS: 10500 S.NO. Parameter Requirement desirable Limit Remarks
1. Colour 5 Maybeextendedupto50 if toxic substances are suspected
2. Turbidity 10 May be relaxed up to 25 in the absence of alternate
3. pH 6.5 to 8.5 May be relaxed up to 9.2 in the absence
4. Total Hardness 300 May be extended up to 600
5. Calcium as Ca 75 May be extended up to 200
6. Magnesium as Mg 30 May be extended up to 100
7. Copper as Cu 0.05 May be relaxed up to 1.5
8. Iron 0.3 May be extended up to 1
9. Manganese 0.1 May be extended up to 0.5
10. Chlorides 250 May be extended up to 1000
11. Sulphates 150 May be extended up to 400
12. Nitrates 45 No relaxation
13. Fluoride 0.6 to 1.2 If the limit is below 0.6 water should be rejected,
Max. Limit is extended to 1.5 1.5
14. Phenols 0.001 May be relaxed up to 0.002
15. Mercury 0.001 No relaxation
16. Cadmium 0.01 No relaxation
17. Selenium 0.01 No relaxation
18. Arsenic 0.05 No relaxation
19. Cyanide 0.05 No relaxation
20. Lead 0.1 No relaxation .
21. Zinc 5.0 May be extended up to 10.0
22. Anionic detergents (MBAS) 0.2 May be relaxed up to 1
23. Chromium as Cr+6 0.05 No relaxation.
24. Poly nuclear aromatic Hydrocarbons -- --
25. Mineral Oil 0.01 May be relaxed up to 0.03
26. Residual free Chlorine 0.2 Applicable only when water is chlorinated
27. Pesticides Absent --
28. Radio active -- --
DRINKING WATER SPECIFICATION: IS: 10500, 1992 (Reaffirmed 1993)
TOLERANCE LIMITS S.No Parameter IS: 10500 Requirement (Desirable limit)
Undesirable effect outside the desirable limit IS: 10500
Permissible limit in the absence of alternate source.
Essential Characteristics 1. pH 6.5 – 8.5
Beyond this range the water will effect the mucous membrane and / or water supply system No relaxation 2. Colour (Hazen Units),
Maximum 5 Above 5, consumer acceptance decreases
25 3. Odour Unobjectio nable -- -- 4. Taste Agreeable -- -- 5. Turbidity, NTU, Max 5 Above 5, consumer acceptance decreases
10 Following Results are expressed in mg/1 : 6.
Total hardness as CaCO3, Max 300 Encrustation in water supply structure and adverse effects on domestic use 600 7.
Iron as Fe, Max 0.30 Beyond this limit taste/appearance are affected, has adverse effect on domestic uses and water supply structures, and promotes iron bacteria. 1.0 8.
Chlorides as Cl, Max 250 Beyond this limit tast, corrosion and palatability are effected 1000 9. Residual, Free Chlorine, Min 0.20 -- --
Desirable Characteristics 10. Dissolved solids, Max 500 Beyond this palatability decreases and may cause gastro intentional irritation 2000 11. Calcium as Ca, Max 75 Encrustation in water supply structure and adverse effects on domestic use 200 12.
Magnesium as Mg, Max 30 -- 100 13. Copper as Cu, Max 0.05 Astringent taste, discolouration and corrosion of pipes, fitting and utensils will be caused beyond this 1.5 14. Manganese as Mn, Max 0.1 Beyond this limit taste/appearance are affected, has an adverse effect on domestic uses and water supply structures 0.3 15. Sulphate as SO4 Max 200 Beyond this causes gastro intentional irritation when magnesium or sodium is present 400 16. Nitrates as NO3 45 Beyond this methemoglobinemia takes place 100 17. Fluoride, Max 1.0 Fluoride may be kept as low as possible. High fluoride may cause fluorosis 1.5 18. Phenolic compounds as C6H5OH, Max 0.001 Beyond this, it may cause objectionable taste and odour 0.002 19. Mercury as Hg, Max 0.001 Beyond this, the water becomes toxic No relaxation 20. Cadmium as Cd, Max 0.01 Beyond this, the water becomes toxic No relaxation 21. Selenium as Se, Max 0.01 Beyond this, the water becomes toxic No relaxation 22. Arsenic as As, Max 0.05 Beyond this, the water becomes toxic No relaxation 23. Cyanide as CN, Max 0.05 Beyond this, the water becomes toxic No relaxation 24. Lead as Pb, Max 0.05 Beyond this, the water becomes toxic No relaxation 25. Zinc as Zn, Max 5 Beyond this limit, it can cause astringent taste and an opalescence in water 15 26. Anionic detergents as MBAs, Max 0.2 Beyond this limit it can cause a light froth in water 1.0 27. Chromium as Cr6+, Max 0.05 May be carcinogenic above this limit No relaxation 28. Polynuclear aromatic hydrocarbons as PAH, Max -- Maybe carcinogenic -- 29. Mineral Oil, Max 0.01 Beyond this limit undesirable taste and odour after chlorination takes place 0.03 30. Pesticides, Max Absent Toxic 0.001 31. Radioactive materials a) α emitters Bq/1, Max b) β emitters Pci/1, Max -- -- -- -- 0.1 1 32. Alkalinity, Max 200 Beyond this limit taste becomes unpleasant 600 33. Aluminium as Al, Max 0.03 Cumulative effect is reported to cause dementia 0.2 34. Boron, Max 1 -- 5 General Standards For Discharge Of Environmental Pollutants Part – A: Effluents Sl. No. Parameter Standards Inland Surface water Public Sewers Land of irrigation Marine/Costal areas 1. Colour and odour Of Annexure-1 -- See 6 of Annexure -1 See 6 of Annexure -1 2. Suspended solids mg/1, max. 100 600 200 a. For process waste water 100 b. For cooling water effluent 10 per cent above total suspended mater of influent 3. Particle size of suspended solids Shall pass 850 micron IS Sieve -- a. Floatable solids, solids max. 3 mm b. Settleable solids. Max 856 microns 4. pH value 5.5 to 9.0 5.5 to 9.0 5.5 to 9.0 5.5 to 9.0 5. Temperature Shall not exceed 5oC above the receiving water temperature -- -- Shall not exceed 5oC above the receiving water temperature 6. Oil and grease, mg/1 max. 10 20 10 20 7. Total residual chlorine, mg/1 max 1.0 -- -- 1.0 8. Ammonical nitrogen (as N), mg/l, max. 50 50 -- 50 9. Total nitrogen (as N), mg/l, max. 100 -- -- 100 10. Free ammonia (as NH3), mg/l, max 5.0 -- -- 5.0 11. Biochemical oxygen demand (3 days at 27oC), mg/l, max 30 350 100 100 12. Chemical oxygen demand, mg/l, max 250 -- -- 250 13. Arsenic (as As) mg/l, max 0.2 0.2 0.2 0.2 14. Mercury (as Hg), mg/l, max 0.01 0.01 -- 0.01 15. Lead (as Pb), mg/l, max 0.1 0.1 -- 2.0 16. Cadmium (as Cd) , mg/l, max 2.0 1.0 -- 2.0 17. Hexavalent chromium (as Cr+6), mg/l, max 0.1 2.0 -- 1.0 18. Total chromium (as Cr), mg/l, max 2.0 2.0 -- 2.0 19. Copper (as Cu), mg/l, max 3.0 3.0 -- 30 20. Zinc (as Zn), mg/l, max 5.0 15 -- 15 21. Selenium (as Se), mg/l, max 0.05 0.05 -- 0.05 22. Nickel (as Ni), mg/l, max 3.0 3.0 -- 50 23. Cyanide (as CN), mg/l, max 0.2 2.0 0.2 0.2 24. Fluoride (as F), mg/l, max 2.0 15 -- 15 25. Dissolved phosphates (as P), mg/l, max 5.0 -- -- -- 26. Sulphide (as S), mg/l, max 2.0 -- -- 5.0 27. Phenolic compounds (as C6H5OH), mg/l, max 1.0 5.0 -- 5.0 Radioactive materials 28. a. α emitters micro cure mg/l, max β emitters micro curemg/l, max 10-7 10-6 10-7 10-6 10-8 10-7 10-7 10-6 29. Bio-assay test 90 % survival of fish after 96 hours in 100 % effluent 90 % survival of fish after 96 hours in 100 % effluent 90 % survival of fish after 96 hours in 100 % effluent 90 % survival of fish after 96 hours in 100 % effluent 30. Manganese (as Mn) 2 mg/l 2 mg/l 2 mg/l 2 mg/l 31.
Iron (as Fe) 3 mg/l 3 mg/l 3 mg/l 3 mg/l 32.
Vanadium (as V) 0.2 mg/l 0.2 mg/l -- 0.2 mg/l 33.
Nitrate Nitrogen 10 mg/l -- -- 20 mg/l *

These standards shall be applicable for industries, operations or processes other than those industries. Operations or process for which standards have been specified in Schedule of the Environment Protection Rules 1989. Ambient Air Quality Standards (National) Pollutants Timeweighted average Concentration in ambient air Method of measurement Sensitive of Area Industrial Area Residential, Rural & Other areas Sulphur Annual Average* 15 μg/m3 80 μg/m3 60 μg/m3
Improved West and Greek Method Dioxide (SO2) 24 hours** 30 μg/m3 120 μg/m3 80 μg/m3 Ultraviolet Fluorescence Oxide of Nitrogen as NO2 Annual* 15 μg/m3 80 μg/m3 60 μg/m3 Jacob & Ochheiser modified (Na- Arsenite) Method 24 hours** 30 μg/m3 120 μg/m3 80 μg/m3 Gas Phase Chemiluminescence Suspended Particulate Matter (SPM) Annual 24 hours** 70 μg/m3 100 μg/m3 360 μg/m3 500 μg/m3 140 μg/m3 200 μg/m3 High volume sampling. (Average flow rate not less than 1.1m3/minute) Respirable Particulate matter (RPM), (size less than 10 μm)

 Annual 24 hours** 50 μg/m3 75 μg/m3 120 μg/m3 150 μg/m3 60 μg/m3 100 μg/m3 Respirable particulate matter sampler Lead (Pb) Annual 24 hours** 0.50 μg/m3 0.75 μg/m3 1.0 μg/m3 1.5 μg/m3 0.75 μg/m3 1.00 μg/m3 ASS Method after sampling using EPM 2000 or equivalent Filter paper Carbon Monoxide (CO) 8 hours** 1 hour 1.0 μg/m3 2.0 μg/m3 5.0 μg/m3 10.0 μg/m3 2.0 μg/m3 4.0 μg/m3

Non-dispersive infra red Spectroscopy * Annual Arithmetic mean of minimum 104 measurements in a year taken twice a week 24 hourly at the uniform interval. ** 24 hourly/8 hourly values should be met 98 % of the time in a year. However, 2 % of the time, it may exceed but not on two consecutive days.

NOTE: 1. National Ambient Air Quality Standard: The levels of air quality with an adequate margin of safety, to protect the public health, vegetation and property.
2. Whenever and wherever two consecutive values exceeds the limit specified above for the respective category, it would be considered adequate reason to institute regular/continuous monitoring and further investigations. CPCB Standards of Noise Levels.

Rural Sub Urban Residential (Urban) Urban (Residential & Business) City Industrial:-
25-35 - 30-40 - 35-45 - 40-50 - 45-50 - 50-60