[SCHEDULE VII [Substituted by Notification No. G.S.R. 826 (E) dated 16.11.2009 (w.e.f. 19.11.1986)]
[See rule 3(3-B)]
NATIONAL AMBIENT AIR QUALITY STANDARDS
S.No.
Pollutant
Time Weighted Average
Concentration in Ambient Air
Industrial, Residential, Rural and Other Area
Ecologically Sensitive Area (notified by
Central Government)
Methods of Measurement
(1)
(2)
(3)
(4)
(5)
(6)
1
Sulphur Dioxide (SO2), µg/m3
Annual*24 hours**
5080
2080
- Improved West and Gaeke- Ultraviolet fluorescence
2
Nitrogen Dioxide (NO2), µg/m3
Annual*
24 hours**
40
80
30
80
- Modified Jacob Hochheiser (Na-Arsenite)-
Ultraviolet fluorescence
3
Particulate Matter (size less than 10µm) or PM10µg/m3
Annual*
24 hours**
60
100
60
100
- Gravimetric- TOEM- Beta attenuation
4
Particulate Matter (size less than 2.5µm) or PM2.5µg/m3
Annual*
24 hours**
40
60
40
60
- Gravimetric- TOEM- Beta attenuation
5
Ozone(O3) µg/m3
8 hours**
1 hour**
100
180
100
180
- UV photometric- Chemi Iminescence- Chemical Method
6
Lead(Pb) µg/m3
Annual*
24 hour**
0.50
1.0
0.50
1.0
- AAS/ICP method after sampling on EPM 2000 or equivalent
filter paper- ED-XRF using Teflon filter
7
Carbon Monoxide (CO) mg/m3
8 hours1 hour
0204
0204
- Non Dispersive Infra Red (NDIR) spectroscopy
8
Ammonia(NH3)µg/m3
Annual*24 hours**
100400
100400
- Chemiluminescence- Indophenol blue method
9
Benzene(C6H6) µg/m3
Annual*
05
05
- Gas chromatography based continuous analyzer- Adsorption
and Desorption followed by GC analysis
10
Benzo(α) Pyrene (BaP) - particulate phase only, ng/m3
Annual*
01
01
- Solvent extraction followed by HPLC/GC analysis
11
Arsenic(As), ng/m3
Annual*
06
06
- AAS/ICP method after sampling on EPM 2000 or equivalent
filter paper
12
Nickel (Ni), ng/m3
Annual*
20
20
- AAS/ICP method after sampling on EPM 2000 or equivalent
filter paper
* Annual arithmetic mean of minimum 104 measurements in a year at a particular site taken twice a week 24 hourly at uniform intervals.
** 24 hourly or 08 hourly or 01 hourly monitored values, as applicable, shall be complied with 98% of the time in a year. 2% of the time, they may exceed the limits but not on two consecutive days of monitoring.
Note - Whenever and wherever monitoring results on two consecutive days of monitoring exceed the limits specified above for the respective category, it shall be considered adequate reason to institute regular or continuous monitoring and further investigation.]
Substituted by Notification No. G.S.R. 826 (E) dated 16.11.2009 (w.e.f. 19.11.1986)
[Inserted by G.S.R. 272(E), dated 5.5.2005 (w.e.f. 5.5.2005).]
[SCHEDULE VII] [Inserted by G.S.R. 176(E), dated 2.4.1996 (w.e.f. 3.4.1996).]
[See rule 3(3-B)]
NATIONAL AMBIENT AIR QUALITY STANDARDS (NAAQS)
{|
Pollutant
Time Weighted Average
Concentration in Ambient Air
Industrial Area
Residential, Rural and Other Area
Sensitive Area
Method of Measurement
(1)
(2)
(3)
(4)
(5)
(6)
SulphurDioxide
Annual Average*
80µg/m3
60
µg/m3
15
µg/m3
- Improved West and Greke method
(SO)2
24hours**
120µg/m3
80µg/m3
30µg/m3
- Ultraviolet Fluorescence
Oxides of nitrogen as No2
Annual Average
80µg/m3
60µg/m3
15µg/m3
- Jacab and Hochheiser modified (Na-Arsenite) Method
24hours**
120
µg/m3
80
µg/m3
30
µg/m3
- Gas Phase Chemiluminescence
Suspended Particulate Matter (SPM)
Annual Average*
360
µg/m3
140
µg/m3
70
µg/m3
- High Volume Sampling
24
hours**
500
µg/m3
200
µg/m3
100
µg/m3
- [Average flow rate not less than1.1
m3/minute]
RespirableParticulate Matter (size less than 10 um) (RPM)
Annual Average*
120µg/m3
60µg/m3
50µg/m3
- Respirable Particulate matter sampler.
24
hours**
150
µg/m3
100
µg/m3
75µg/m3
Lead (Pb)
Annual Average*
1.0µg/m3
0.75
µg/m3
0.50
gg/m3
- AAS method after sampling using
24
hours**
1.5µg
/m3
1.00g/m3
0.75
µg /m3
EMP 2000 or equivalent filter paper.
Carbon
8
hours**
5.0
mg/m3
2.0
mg/m3
1.0
mg/m3
- Non-dispersive, infrared spectroscopy.
Monoxide
1
hour
10.0
mg/m3
4.0
mg/m3
2.0
mg/m3
*Annual Arithmetic mean of minimum 104 measurements in a year taken twice a week 24 hourly at uniform interval.
**24 hourly/8 hourly values shall be met 98% of the time in a year. 2% of the time, it may exceed but not on two consecutive days.
Notes.- 1. National Ambient Air Quality Standard: The levels of a air quality necessary with an adequate margin of safety, to protect the public health, vegetation and property.