Limit

PERMISIBLE LIMIT

   

These Standards shall be applicable for industries, operations or processes other than those industries, for which standards have already been prescribed under Environment Protection Rules, 1989
(A) Liquid

SL.no        Parameter Standards 
Inland surface water  Public sewers

Land of irrigation

Marine/coastal areas
                                                   (a)                     (b)                       (c)                                  (d)
    1. Colour and odour remove as far as practicable  
    2. Suspended solids mg/l. max. 100 600 200 (a) For process waste water 100
(b) For cooling water effluent 10% above total suspended matter of influent.
    3. Particle size of suspended solids shall pass 850 micron IS Sieve     (a)Floatable solids, max. 3mm.
(b)Settable solids (max 850 micron)
    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
50C above the receiving water temperature		     shall not exceed 50C above the receiving water temperature
    6. Oil and grease, mg./l, max. 10 20 10 20
   7. Total residual chlorine, mg/l. max. 1.0     1.0
   8. Ammonical nitrogen (as N.) mg/l max 50 50   50
   9. Total Kjeldahl Nitrogen (as NH3)
mg/l. max		 100     100
  10. Free ammonia (as NH3), mg/l.max 5.0     5.0
  11. Biochemical oxygen demand (3 days at 270C), 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 1.0   2.0
  16.  Cadmium  (as Cd) mg/l. max  2.0 1.0   2.0
  17. Hexavalent chro- mium (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   3.0
  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   5.0
  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. Sulfide (as S) mg/l, max 2.0     5.0
  27. Phenolic compounds (as C6H5OH) mg/l, max 1.0 5.0   5.0
  28. Radioactive materials:
(a)Alfa emitters microcurie/ml, max.
(b)Beta emitters micro curie/ml,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
  31. Iron (as Fe) 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

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(B) NOISE

(i) General

Area
Code		 Category of Area      Limit in dB(A) Leq. 
Day Time Night Time
A. Industrial area 75 70
B. Commercial area 65 55

C.

 Residential area 55 45

D.

 Silence zone 50 40


Note-1    Day time is reckoned in between 6 a.m. And 9 p.m.
Note-2    Night time is reckoned in between 9 p.m. and 6 a.m.
Note-3    Silence zone is defined as areas upto 100 meters around such premises as hospital, educational institutions and courts. The silence zones are to be declared by the Competent  Authority.
Note-4    Mixed categories of areas should be declared as "one of the four above mentioned categories by the Competent Authority and the corresponding standard shall apply.
 

(ii) Generator Set run with Petrol or Kerosene

 

Effective From
September 1, 2001 September 1, 2000
Sound power Level

L-wa

 90 dBA 86 dBA

 

(iii) Vehicles (with effect from the 1st January, 2003)

The following noise limits for vehicles shall be applicable from 1st day of January, 2003. The test method to be followed shall be IS:3028-1998.

Sl. No. Type of vehicle Noise Limits from

1st January,2003, dB(A)
01. Two Wheeler

Displacement upto 80 cm3

Displacement more than

80cm3 but upto 175 cm3

Displacement more than 175

cm3

 75

77

80
02. Three Wheeler

Displacement upto 175 cm3

Displacement more than 175

cm3

 77

80
03. Passenger Car 75
04. Passenger or Commercial Vehicle

Gross vehicle weight upto 4

Tonne

Gross vehicle weight more than 4

tonne but upto 12 tonne

Gross vehicle weight more than

12 tonne

 77

80

82

The existing limits on pass-by noise shall continue with the test method IS 3028-1998 till 1st January, 2003.

(C) AMBIENT AIR QUALITY STANDARDS 

Pollutants Time weighted
average		 Concentration in ambient air Method of measurement
Industrial
Area		 Residential
Area		 Sensitive of Rural 
& other Areas
1 2 3 4 5 6
Sulphur Dioxide
(SO2)		 Annual Average

24 hours 		80 μg/m3


120 μg/m3		 60 μg/m3


80 μg/m3		 15 μg/m3


30 μg/m3 		1.Improved West and 
   Geake method
Oxides of Nitrogen 
as NO2		 Annual Average


24 hours		 80 μg/m3



120 μg/m3		 60 μg/m3



80 μg/m3		 15 μg/m3



30 μg/m3		 1. Ultraviolet fluorescence
2. Jacob & Hochheiser
modified(Na-Arsenite)Method
3. Gas Phase Chemiluminescence
Suspended
Particulate
Matter(SPM)		 Annual Average

24 hours		 360 μg/m3


500 μg/m3		 140 μg/m3


200 μg/m3 		70 μg/m3


100 μg/m3		 High Volume sampling 
(Average flow rate not less
than 1.1 m3/minute)
Respirable Particulate
matter (size less than 
10 μm)(RPM)		 Annual Average

24 hours		 120 μg/m3


150 μg/m3		 60 μg/m3


100 μg/m3		 50 μg/m3


75 μg/m3		 Respirable particulate 
matter sampler
Lead(Pb) Annual Average

24 hours

 1.0 μg/m3
 

1.5 μg/m3

 0.75 μg/m3

1.00 μg/m3

 0.50 μg/m3

0.75 μg/m3

 AAS Method after sampling
using EPM 2000 or equivalent
Filter paper
Carbon Monoxide
(CO)		 8 hours

1 hour		 5.0 mg/m3

10.0 mg/m3		 2.0 mg/m3

4.0 mg/m3		 1.0 mg/m3

2.0 mg/m3		 Non dispersive infrared 
spectroscopy

bullet.gif (1653 bytes)    Annual Arithmetic mean of minimum 104 measurements in a year taken twice a week 24 hourly at
        uniform interval.

bullet.gif (1653 bytes)     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
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