| Last Updated:: 18/02/2021

AIR QUALITY MANAGEMENT


National Air Monitoring Programme (NAMP)

MANDATE

Air (Prevention and Control of Pollution) Act, 1981 Government of India enacted to arrest the deterioration in the air quality. The act prescribes various functions for the Central Pollution Control Board (CPCB) at the apex level and State Pollution Control Boards at the state level.

The main functions of the Central Pollution Control Board are as follows:

- To advise the Central Government on any matter concerning the improvement of the quality of the air and the prevention, control and abatement of air pollution. To plan and cause to be executed a nation-wide programme for the prevention, control and abatement of air pollution.

- To provide technical assistance and guidance to the State Pollution Control Board.

- To carry out and sponsor investigations and research related to prevention, control and abatement of air pollution.

- To collect, compile and publish technical and statistical data related to air pollution; and To lay down and annual standards for the quality of air.


The main functions of the State Pollution Control Boards are as follows:

- To plan a comprehensive programme for prevention, control and abatement of air pollution and to secure the execution thereof;

- To advise the State Government on any matter concerning prevention, control and abatement of air pollution.

- To collect and disseminate information related to air pollution.

- To collaborate with Central Pollution Control Board in programme related to prevention, control and abatement of air pollution; and

- To inspect air pollution control areas, assess quality of air and to take steps for prevention, control and abatement of air pollution in such areas.

World Health Organization (WHO) GUIDELINES

 

WHO GUIDELINES FOR AIR QUALITY

WHO’s work on environmental health provides the basis for global standards in environmental quality and an effective investments for public health such as air quality guidelines and drinking water quality guidelines. The “WHO air quality guidelines” provide an assessment of health effects of air pollution and thresholds for health-harmful pollution levels.


Pollutants
Time Weighted Average
Standard limits as per WHO guidelines (µg/m3)
Particulate matter (PM) – 2.5
Annual mean
10
24 hours mean
25
Particulate matter (PM) – 10
Annual mean
20
24 hours mean
50
Ozone (O3)
8 hour mean
100
Nitrogen dioxide (NO2)
Annual mean
40
1 hour mean
200
Sulphur dioxide (SO2)
24 hours mean
20
10 minute mean
500

References:
WHO Air quality guidelines for particulate matter, ozone, nitrogen dioxide, and sulfur dioxide, Summary of risk assessment, World Health Organization, 2008.

National Air Monitoring Programme (NAMP)

NATIONAL AIR MONITORING PROGRAMME (NAMP)

Central Pollution Control Board is executing a nation-wide programme of ambient air quality monitoring known as National Air Quality Monitoring Programme (NAMP). The network consists of 793 operating stations covering 344 cities/towns in 29 states and 6 Union Territories of the country.


The objectives of the N.A.M.P. are:

- To determine status and trends of ambient air quality;

- To ascertain whether the prescribed ambient air quality standards are violated;

- To Identify Non-attainment Cities;

- To obtain the knowledge and understanding necessary for developing preventive and corrective measures;

- To understand the natural cleansing process undergoing in the environment through pollution dilution, dispersion, wind based movement, dry deposition, precipitation and chemical transformation of pollutants generated.

Under N.A.M.P., four air pollutants viz ., Sulphur Dioxide (SO2), Oxides of Nitrogen as NO2, Respirable Suspended Particulate Matter (RSPM / PM10) and Fine Particulate Matter (PM2.5) have been identified for regular monitoring at all the locations. The monitoring of meteorological parameters such as wind speed and wind direction, relative humidity (RH) and temperature were also integrated with the monitoring of air quality.
The monitoring of pollutants is carried out for 24 hours (4-hourly sampling for gaseous pollutants and 8-hourly sampling for particulate matter) with a frequency of twice a week, to have one hundred and four (104) observations in a year. The monitoring is being carried out with the help of Central Pollution Control Board; State Pollution Control Boards; Pollution Control Committees; National Environmental Engineering Research Institute (NEERI), Nagpur. CPCB co-ordinates with these agencies to ensure the uniformity, consistency of air quality data and provides technical and financial support to them for operating the monitoring stations. N.A.M.P. is being operated through various monitoring agencies. Large number of personnel and equipments are involved in the sampling, chemical analyses, data reporting etc. It increases the probability of variation and personnel biases reflecting in the data, hence it is pertinent to mention that these data be treated as indicative rather than absolute.

NATIONAL AMBIENT AIR QUALITY MONITORING SERIES (NAAQMS)

SERIES

PUBLICATIONS

RUPEES

NAAQMS/1/1990-91

National Ambient Air  Quality Statistics of India 1987-89     

50*

NAAQMS/2/1990-91

Ambient  Air  Quality Status of  Some Cities/Towns  in India

120*

NAAQMS/3/1990-91

National Ambient Air Quality Statistics of India, 1990         

50*

NAAQMS/4/1992-93

National Ambient Air Quality Statistics of India 1991           

50*

NAAQMS/5/1994-95

Ambient  Air  Quality Survey of Major Traffic Intersections in Delhi

100*

NAAQMS/6/1994-95

National  Ambient Air  Quality Statistics of India 1992

140*

NAAQMS/7/1995-96

National Ambient Air Quality Statistics of India 1993,1994  

500*

NAAQMS/8/1996-97

National Ambient Air Quality Statistics of India 1995

200*

NAAQMS/9/1996-97

Ambient Air Quality  Status and Trends in Delhi Metropolitan City (1989-1993)

160*

NAAQMS/10/1996-97

Ambient Air Quality Status of India – 1996

100*

NAAQMS/11/1997

Air Quality at Major Traffic Intersections of Delhi

100*

NAAQMS/12/1998-99

Ambient Air Quality Monitoring Status – 1997

200*

NAAQMS/14/2000-01

Air Quality Status and Trends in India

200

NAAQMS/15/2000-01

National Ambient Air Quality Status – 1998

100

NAAQMS/17/2000-01

Air Quality in Delhi : (1989-2000)

350*

NAAQMS/18/2000-01

Vehicular Pollution Control in Delhi – Initiatives & Impacts

175

NAAQMS/19/2000-01

Respirable Particulate Matter and its Health Effects

350*

NAAQMS/21/2002-03

Air Quality

200

NAAQMS/22/2002-03

National Ambient Air Quality Status – 2000

200

NAAQMS/23/2003-04

National Ambient Air Quality Status – 2001

200

NAAQMS/24/2003-04

National Ambient Air Quality Status – 2002

350

NAAQMS/25/2003-04

Guidelines for Ambient Air Quality Monitoring

400

NAAQMS/26/2004-05

National Ambient Air Quality Status – 2003

400

NAAQMS/27/2005-06

National Ambient Air Quality Status – 2004

300

NAAQMS/29/2006-07

Air Quality Trends and Action Plans in Seventeen Cities

875

NAAQMS/30/2006-07

National Ambient Air Quality Status – 2005

300

NAAQMS/31/2006-07

Estimation of Levels of Benzene in Ambient Air and its Impact on Health in Mumbai

400

NAAQMS/32/2007-08

National Ambient Air Quality Status -06

 

NAAQMS/33/2009-10

Ambient Air Quality Status - 08

150*

NAAQMS/34/2010-11

National Ambient Air Quality Status 2009

875

NAAQMS/35/2011-12

National Ambient Air Quality Status and Trends in India – 2010

750

NAAQMS/36/2012-13

Guidelines for the Measurment of Ambient Air Pollutants Volume -I

100

NAAQMS/37/2012-13

Guidelines for the Measurment of Ambient Air Pollutants Volume -II

100

NAAQMS/38/2014-15

National Ambient Air Quality Status and Trends 2012

700

NAAQMS/39/2013-14

National Ambient Air Quality Status and Trends 2012

700

NAAQMS/45/2016-17

Technical Handbook for Installation, Maintenance, Calibration, Data Connectivity and Data Quality check of Continous Ambient Air Quality Monitoring System (Real Time)

500

National Air Monitoring Programme (NAMP)

MONITORING NETWORKS


Frequency and Parameters Monitored

Under N.A.M.P., three air pollutants viz., Sulphur Dioxide (SO2), Nitrogen dioxides (NO2) and Respirable Suspended Particulate Matter (RSPM/PM10) have been identified for regular monitoring at all the locations. The monitoring of meteorological parameters such as wind speed and direction, relative humidity and temperature was also integrated with the monitoring of air quality. The monitoring of pollutants is carried out for 24 hours (4-hourly sampling for gaseous pollutants and 8-hourly sampling for particulate matter) with a frequency of twice a week, to have 104 observations in a year.


Number of Monitoring Stations

There are 804 operating stations in 344 cities/towns in 28 states and 6 Union Territories of the country. Table given below shows state-wise and city-wise number of operating monitoring stations.


Monitoring Agencies

The monitoring is being carried out by Central Pollution Control Board; State Pollution Control Boards; Pollution Control Committees; National Environmental Engineering Research Institute (NEERI), Nagpur. CPCB co-ordinates with the other agencies to ensure the uniformity, consistency of air quality data and provides technical and financial support to them for operating the monitoring station. N.A.M.P. is being operated through various monitoring agencies, large number of personnel and equipment are involved in the sampling, chemical analyses, data reporting etc. It increases the probability of variation and personnel biases reflecting in the data, hence it is pertinent to mention that these data be treated as indicative rather than absolute.

Operating Stations under National Air Quality Monitoring Programme (NAMP)


S.no State/Union Territory City/ Town/ Village
No. of Operating Station
1 Arunachal Pradesh Itanagar
1
Naharlagun
1
2 Andhra Pradesh
Visakhapatnam
9
Kakinada
4
Rajamundry/Rajamahendravaram
4
Eluru
4
Vizianagaram
4
Srikakulam
4
Kurnool
4
Tirupati
4
Chitoor
5
Kadapa
5
Anantapur
4
Vijaywada
9
Ongole
4
Guntur
4
Nellore
4
3 Assam Bongaigaon
2
Guwahati
6
Tezpur
1
Sibsagar
2
Dibrugarh
1
Golaghat
1
Silchar
2
Daranga
1
Margheita
1
North Lakhimpur
1
Nagaon
1
Tinsukhia
3
Nalbari
1
4 Bihar Patna
2
Darbhanga
1
Mujjafarpur
1
Gaya
1
Begusarai
1
Rajgir
1
Sasaram
1
5 Chandigarh Chandigarh
5
6 Chattisgarh (UT) Korba
3
Raipur
2
Bilaspur
1
Durg- Bhillainagar
4
Raigarh
3
7 Delhi (UT) Delhi
10
8 Dadara & Nagar Haveli and Daman Diu (UT) Baldevi (Dadra & Nagar Haveli)
1
Silvasa
2
Patlara (Daman)
1
Daman
2
9 Goa Panaji
1
Vasco
1
Marmagao
1
Codli
1
Honda
1
Bicholim
1
Amona
1
Assanora
1
Curchorem
1
Usgao
1
Margao
1
Mapusa
1
Sanguem
1
Ponda
1
Tilamol
1
Kundaim
1
Tuem
1
Cuncolim
1
10 Gujarat Ahmedabad
9
Ankaleshwar
2
Jamnagar
1
Rajkot
2
Surat
3
Vadodara
5
Vapi
2
11 Haryana Faridabad
2
Hissar
2
Yamuna Nagar
1
12 Himachal Pradesh Damtal
2
Parwanoo
2
Poanta Sahib
2
Shimla
2
Kala Amb
2
Baddi
3
Nalagarh
1
Una
2
Sunder Nagar
2
Dharamshala
2
Marhi
1
Gulaba
1
Vashisht
1
Manali
2
13 Jammu and Kashmir (UT) Jammu
3
Pulwama
1
Srinagar
3
14 Jharkhand Dhanbad
3
Jharia
1
Sindri
1
Jamshedpur
2
Ranchi
1
Saraikela
1
Barajamda
1
15 Karnataka Bangalore
9
Hubli - Dharwar
2
Mangalore
1
Hassan
1
Mysore
2
Gulbarga
1
Belgaum
1
Devanagere
3
Mandya
1
Raichur
1
Bijapur
1
Chitradurga
1
Shimoga
1
Karwar
1
Bagalkote 
1
Kolar 
1
Tumkar
1
Bidar
1
16 Kerala Kozhikode
2
Kottayam
2
Kochi
8
Thiruvanantapuram
4
Palakkad
1
Alappuzha
3
Pathanamthitta
1
Kollam
2
Wayanad
2
Mallappuram
2
Thrissur
2
17 Lakshadweep (UT) Kavaratti
1
18 Madhya Pradesh Bhopal
8
Indore
3
Jabalpur
2
Nagda
3
Gwalior
2
Sagar
2
Satna
2
Singrauli
3
Ujjain
4
Prithampur
2
Chindwara
2
Amlai
2
Katni
2
Dewas
3
19 Maharashtra Aurangabad
4
Bhiwandi
3
Lote
2
Tarapur
3
Kolhapur
3
Mumbai
3
Ambernath
1
Chandrapur
6
Dombivali
1
Nagpur
7
Nasik
4
Solapur
2
Pune
3
Pimpri Chinchiwad
1
Thane
3
Navi Mumbai
6
Mahad
3
Roha
2
Sangli
3
Amravati
3
Latur
3
Ulhas Nagar
2
Badlapur
1
Nanded
3
Jalgaon
3
Jalna
2
Akola
3
20 Meghalaya Shillong
4
Dwaki
1
Brynihat
1
Tura
1
Nongstoin
1
Umaim/ Umsning
1
Khlihriat
1
21 Mizoram Aizwal
5
Lunglei
2
Kolasib
2
Champhai
2
22 Manipur Imphal
1
23 Nagaland Dimapur
7
Kohima
2
24 Odisha Rayagada
2
Rajgangpur
1
Bonaigarh
1
Rourkela
4
Talcher
2
Angul
2
Bhubaneshwar
6
Cuttack
3
Sambalpur
1
Balasore
3
Kalinga Nagar
3
Berhampur
1
Puri
2
Konark
1
Jharsuguda
3
Paradeep
3
25 Punjab Aligarh (Jagraon)
1
Amritsar
2
Aspal Khurd (Tapa)
1
Bara Pind (Goraya)
1
Bhatinda
1
Binjon (Garshankar)
1
Bishanpura (Payal)
1
Changal (Sangrur)
1
Chowkimann (Jagraon)
1
Dera Baba Nanak
1
Dera Bassi
2
Fatehpur (Samana)
1
Gobindgarh
3
Guru Ki Dhab (Kotkapura)
1
Jaito sarja (Batala)
1
Jalandhar
4
Khanna
2
Kharaori (Sirhind)
1
Kotladoom (Ajnala)
1
Lakho Ke Behram (Ferozpur)
1
Ludhiana
4
Mrar Kalan (Muktsar)
1
Mukandpur (Nawashahar)
1
Mureedke (Batala)
1
Naudhrani (Malerkotla)
1
Naya Nangal
2
Patiala
2
Peer Mohammad (Jalalabad)
1
Poohli (Bhatinda)
1
Qila Bharian (Sangrur)
1
Rakhra (Patiala)
1
Rohila (Samrala)
1
Subanpur (Dhilwan)
1
Tirathpur (Amritsar I)
1
26 Puducherry (UT) Puducherry
3
Karaikal
3
27 Rajasthan Alwar
3
Jaipur
9
Chittorgargh
3
Jodhpur
9
Kota
6
Udaipur
3
Bharatpur
3
Bhiwadi
3
28 Sikkim Gangtok
2
Namchi
1
Ravangla
1
Mangan
1
Chungthang
1
Singtam
1
Rangpo
1
Pelling
1
29 Tamilnadu Chennai
11
Tuticorin
3
Coimbatore
3
Madurai
3
Salem
1
Trichy
5
Cuddalore
3
Mettur
2
30 Tripura Agartala
2
31 Telangana Hyderabad
10
Ramagundum
1
Patencheru
1
Nalgonda
2
Khammam
2
Warangal
2
Karimnagar
1
Sangareddy
3
Nizamabad
1
Kothur
1
Adilabad
1
32 Uttar Pradesh Agra
6
Allahabad
5
Anpara
2
Bagpat
2
Firozabad
3
Gajroula
2
Ghaziabad
4
Greater Noida
2
Hapur
2
Kanpur
9
Lucknow
8
Muzaffar Nagar
2
Noida
4
Varanasi
5
Jhansi
2
Khurja
2
Meerut
2
Bareily
2
Moradabad
2
Mathura
2
Saharanpur
2
Unnao
2
Gorakhpur
3
Rai Bareli
3
33 Uttarakhand Dehradun
3
Haridwar
1
Rishikesh
1
Haldwani
1
Rudrapur
1
Kashipur
1
34 West Bengal Kolkata
21
Durgapur
4
Haldia
4
Howrah
4
Alipurduar
3
Amtala
1
Asansol
3
Barrckpore
3
Ranigunj
3
Kalimpong
1
Baruipur
1
Jhargram
1
Sankrail
4
Uluberia
1
Barasat
1
Kalyani
1
Ranaghat
1
Krishnanagar
1
Baharampur
1
Dankuni
1
Rishra
1
Chinsura
1
Tribeni
1
Kharagpur
1
Medinipur
1
Ghatal
1
Tamluk
1
Bardhaman
1
Bankura
1
Suri
1
Rampurhat
1
Bolpur
1
Purulia
1
Malda
1
Siliguri
1
Jalpaiguri
1
Darjeeling
1
Coochbihar
2
Balurghat
1
Madhyamgram
1
Raigunj
1
Total 344
804
 
Cities
344
Operating Stations
804
States
28
    UTs
6
NB. Village names with tahsheel in parentheses under City/Town/Village
are Rural Stations
National Air Monitoring Programme (NAMP)

Non-attainment Cities

 

LIST OF NON ATTAINMENT CITIES IN INDIA

State S. No. City
Andhra Pradesh (13) 1. Guntur
2. Kurnool
3. Nellore
4. Vijayawada
5. Vishakhapatnam
6. Anantapur
7. Chitoor
8. Eluru
9. Kadapa
10. Ongole
11. Rajahmundry
12. Srikakulam
13. Vizianagaram
Assam (05) 14. Guwahati
15. Nagaon
16. Nalbari
17. Sibsagar
18. Silchar
Bihar (03) 19. Patna
20. Gaya
21. Muzaffarpur
Chandigarh (01) 22. Chandigarh
Chhattisgarh (03) 23. Bhilai
24. Korba
25. Raipur
Delhi (01) 26. Delhi
Gujarat (03) 27. Surat
28. Ahmedabad
29. Vadodara
Himachal Pradesh (7) 30. Baddi
31. Damtal
32. Kala Amb
33. Nalagarh
34. Paonta Sahib
35. Parwanoo
36. Sunder Nagar
Jammu & Kashmir (2) 37. Jammu
38. Srinagar
Jharkhand (01) 39. Dhanbad
Karnataka (04) 40. Bangalore
41. Devanagere
42. Gulburga
43. Hubli-Dharwad
Madhya Pradesh (06) 44. Bhopal
45. Dewas
46. Indore
47. Sagar
48. Ujjain
49. Gwalior
Maharashtra (18) 50. Akola
51. Amravati
52. Aurangabad
53. Badlapur
54. Chandrapur
55. Jalgaon
56. Jalna
57. Kolhapur
58. Latur
59. Mumbai
60. Nagpur
61. Nashik
62. Navi Mumbai
63. Pune
64. Sangli
65. Solapur
66. Ulhasnagar
67. Thane
Meghalaya (01) 68. Byrnihat
Nagaland (02) 69. Dimapur
70. Kohima
Orissa (07) 71. Angul
72. Balasore
73. Bhubaneswar
74. Cuttack
75. Rourkela
76. Talcher
77. Kalinga Nagar
Punjab (09) 78. Dera Bassi
79. Gobindgarh
80. Jalandhar
81. Khanna
82. Ludhiana
83. Naya Nangal
84. Pathankot/Dera Baba
85. Patiala
86. Amritsar
Rajasthan (05) 87. Alwar
88. Jaipur
89. Jodhpur
90. Kota
91. Udaipur
Tamilnadu (03) 92. Thoothukudi
93. Trichy
94. Madurai
Telangana (04) 95. Hyderabad
96. Nalgonda
97. Patancheruvu
98. Sangareddy
Uttar Pradesh (16) 99. Agra
100. Allahabad
101. Anpara
102. Bareily
103. Firozabad
104. Gajraula
105. Ghaziabad
106. Jhansi
107. Kanpur
108. Khurja
109. Lucknow
110. Moradabad
111. Noida
112. Raebareli
113. Varanasi
114. Gorakhpur
Uttarakhand (03) 115. Kashipur
116. Rishikesh
117. Dehradun
West Bengal (07) 118. Kolkata
119. Asansol
120. Barrackpore
121. Durgapur
122. Haldia
123. Howrah
124. Raniganj

National Air Monitoring Programme (NAMP)

AMBIENT AIR QUALITY STANDARDS (NATIONAL)

 

 

National Air Quality Monitoring Programme (NAMP)

AIR QUALITY TRENDS in 46 Million Plus Cities


Trends in Annual Average Concentration of SO2, NO2 and PM10 in 46 million plus cities:


ANDHRA PRADESH


HYDERABAD



VIJAYWADA



VISHAKHAPATNAM

National Air Quality Monitoring Programme (NAMP)

AIR QUALITY TRENDS in 46 Million Plus Cities


Trends in Annual Average Concentration of SO2, NO2 and PM10 in 46 million plus cities:


BIHAR


PATNA

National Air Quality Monitoring Programme (NAMP)

AIR QUALITY TRENDS in 46 Million Plus Cities


Trends in Annual Average Concentration of SO2, NO2 and PM10 in 46 million plus cities:


CHATTISGARH


RAIPUR

National Air Quality Monitoring Programme (NAMP)

AIR QUALITY TRENDS in 46 Million Plus Cities


Trends in Annual Average Concentration of SO2, NO2 and PM10 in 46 million plus cities:


DELHI


DELHI

National Air Quality Monitoring Programme (NAMP)

AIR QUALITY TRENDS in 46 Million Plus Cities


Trends in Annual Average Concentration of SO2, NO2 and PM10 in 46 million plus cities:


GUJARAT


AHMEDABAD



RAJKOT



SURAT



VADODARA

National Air Quality Monitoring Programme (NAMP)

AIR QUALITY TRENDS in 46 Million Plus Cities


Trends in Annual Average Concentration of SO2, NO2 and PM10 in 46 million plus cities:


HARYANA


FARIDABAD

National Air Quality Monitoring Programme (NAMP)

AIR QUALITY TRENDS in 46 Million Plus Cities


Trends in Annual Average Concentration of SO2, NO2 and PM10 in 46 million plus cities:


JHARKHAND


DHANBAD



RANCHI

National Air Quality Monitoring Programme (NAMP)

AIR QUALITY TRENDS in 46 Million Plus Cities


Trends in Annual Average Concentration of SO2, NO2 and PM10 in 46 million plus cities:


KARNATAKA


BANGALORE

National Air Quality Monitoring Programme (NAMP)

AIR QUALITY TRENDS in 46 Million Plus Cities


Trends in Annual Average Concentration of SO2, NO2 and PM10 in 46 million plus cities:


MADHYA PRADESH


BHOPAL



GWALIOR



INDORE



JABALPUR

National Air Quality Monitoring Programme (NAMP)

AIR QUALITY TRENDS in 46 Million Plus Cities


Trends in Annual Average Concentration of SO2, NO2 and PM10 in 46 million plus cities:


MAHARASHTRA


AURANGABAD



MUMBAI



NAGPUR



NASHIK



PUNE



THANE



NAVI MUMBAI



KALYAN DOMBIVALI



PIMPRI CHINCHWAD

National Air Quality Monitoring Programme (NAMP)

AIR QUALITY TRENDS in 46 Million Plus Cities


Trends in Annual Average Concentration of SO2, NO2 and PM10 in 46 million plus cities:


PUNJAB


AMRITSAR



LUDHIANA

National Air Quality Monitoring Programme (NAMP)

AIR QUALITY TRENDS in 46 Million Plus Cities


Trends in Annual Average Concentration of SO2, NO2 and PM10 in 46 million plus cities:


RAJASTHAN


JAIPUR



JODHPUR



KOTA

National Air Quality Monitoring Programme (NAMP)

AIR QUALITY TRENDS in 46 Million Plus Cities


Trends in Annual Average Concentration of SO2, NO2 and PM10 in 46 million plus cities:


TAMILNADU


CHENNAI



COIMBATORE



MADURAI

National Air Quality Monitoring Programme (NAMP)

AIR QUALITY TRENDS in 46 Million Plus Cities


Trends in Annual Average Concentration of SO2, NO2 and PM10 in 46 million plus cities:


UTTARPRADESH


AGRA



ALLAHABAD



GHAZIABAD



KANPUR



LUCKNOW



MEERUT



VARANASI

National Air Quality Monitoring Programme (NAMP)

AIR QUALITY TRENDS in 46 Million Plus Cities


Trends in Annual Average Concentration of SO2, NO2 and PM10 in 46 million plus cities:


WEST BENGAL


KOLKATA



HOWRAH

National Air Quality Monitoring Programme (NAMP)

AIR QUALITY Levels in 46 Million Plus Cities


SO2 Levels (annual) in 46 million plus (metro) cities 2012:


National Air Quality Monitoring Programme (NAMP)

AIR QUALITY Levels in 46 Million Plus Cities


NO2 Levels (annual) in 46 million plus (metro) cities 2012:


National Air Quality Monitoring Programme (NAMP)

AIR QUALITY Levels in 46 Million Plus Cities


PM10 Levels (annual) in 46 million plus (metro) cities 2012: