Abstract
The analyses presented in this paper include the concentration levels of NO2 and O3 measured during 2 successive years in twin cities (Rawalpindi and Islamabad) of Pakistan from November 2009 to March 2011. NO2 was determined using the passive sampling method, while ozone was determined by Model 400E ozone analyzer. The average NO2 and O3 concentration in twin cities of Pakistan was found to be 44 ± 6 and 18.2 ± 1.24 ppb, respectively. Results indicate that the concentration of NO2 and O3 show seasonal variations. Results also depict that NO2 and O3 concentration levels are high in areas of intense traffic flow and congestion. Rawalpindi has more elevated levels of NO2 and O3 as compared to the Islamabad due to the narrow roads, enclosing architecture of road network and congestion. Climatic variables also influenced the NO2 and O3 concentration, i.e., temperature is positively related with O3, while negatively related with NO2, relative humidity is directly related with NO2 and inversely related with O3, whereas rainfall show negative association with both NO2 and O3 concentration. Comparing the results with WHO standards reveals that NO2 concentration levels at all the sampling points are above the permissible limit, while ozone concentration is still lower than the WHO standards. Thus, there is a need to take appropriate steps to control these continuously increasing levels of NO2 and O3 before they become a serious hazard for the environment and people living in those areas.
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This research project has been supported by the Pakistan Science Foundation.
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Appendix
Appendix
Sampling sites | Codes | |
---|---|---|
Dull carriage ways | ||
Rawalpindi | Airport road | 2 |
Peshawar Road | 90 | |
6th Road | 0 | |
Murree Road | 86 | |
Mall Road | 119 | |
Islamabad | Islamabad Expressway Highway | 63 |
Main Zero point | 132 | |
National Highway Authority Underpass | 87 | |
Major Roads | ||
Rawalpindi | Faiz Abad | 48 |
Bank Road | 16 | |
Ammar Chowk | 11 | |
Missile Chowk | 84 | |
Main Khanna Road | 73 | |
Ali Nawaz Gol Chowk | 8 | |
Karal Chowk | 72 | |
Sir Syed Chowk Tipu Road | 114 | |
Chaklala Garrisons | 26 | |
Islamabad | Faiz Ahmad Faiz Road | 47 |
Rawal Dam Road | 99 | |
Islamabad Toll Plaza | 65 | |
Sub-roads | ||
Rawalpindi | Justice Ali Nawaz Chohan Chowk | 136 |
Tipu Road | 120 | |
Rawal Road | 100 | |
Saidpur Road | 106 | |
College Road | 35 | |
Hummak Road | 60 | |
Islamabad | Sufi Tabassam Road | 116 |
Post Office Road G-6/2 | 94 | |
Tarnol | 117 | |
Khokhar Road | 76 | |
Small Roads | ||
Rawalpindi | Transformer Chowk | 122 |
Raja Ashraf Road | 98 | |
Chaklala Road | 25 | |
Islamabad | Lehtrar link Road | 79 |
KRL Road | 77 | |
Enercon G-5/2 | 42 | |
Public Hospitals | ||
Rawalpindi | CMH Hospital | 34 |
Benazir Bhutto Hospital | 19 | |
Cantonment General Hospital | 39 | |
Social Security Hospital I 12 | 115 | |
Holy Family Hospital | 58 | |
Islamabad | Poly Clinic Hospital | 93 |
PIMS | 91 | |
NOORI | 89 | |
Private Hospitals | ||
Rawalpindi | Jinnah Memorial Hospital | 69 |
Anwar Hospital | ||
Al-Sadiq Hospital | 4 | |
Ibrar Surgery | 61 | |
Bilal Hospital | 20 | |
Marium Memorial Hospital | 82 | |
Anwar clinic Peshawar Road | 12 | |
Al-shifa Eye hospital | 5 | |
Valley Clinic | 124 | |
Islamabad | Ali Medical Centre | 6 |
Public Educational Institutions | ||
Rawalpindi | FJWU | 52 |
Gorden College | 54 | |
F.G Sir Syed College | 46 | |
Government College for Women satellite Town | 57 | |
F.G Postgraduate College for Girls | 45 | |
FWO Primary School Chaklala | 53 | |
Govt. Post Graduate College for Women | 128 | |
University of Arid Agriculture | 13 | |
RMC | 103 | |
Waqar-un-Nisa College | 126 | |
Government degree College for women | 56 | |
Rawalpindi College for Girls 6th Road | 101 | |
Islamabad | F.G Margalla College for Women F-7/4 | 44 |
H-8/2 School for Boys and Girls | 130 | |
F.G Junior Model School for Boys | 43 | |
Allama Iqbal Open University | 10 | |
Quaid-e-Azam University | 96 | |
Islamabad College for Girls F-6/2 | 66 | |
Private educational institutions | ||
Rawalpindi | Silver Oaks School | 113 |
Al-Mehr Public School | 7 | |
The Lassanians | 118 | |
City School | 31 | |
Leaders College | 78 | |
Beacon House | 17 | |
Fazaia Inter College | 127 | |
Toddlers High School | 121 | |
Beacon House Peshawar Road | 18 | |
Rawalpindi College of Commerce | 102 | |
University of Lahore | 123 | |
Educators | 40 | |
City School Peshawar Road | 32 | |
Roots | 105 | |
House of Secondary Education | 59 | |
Educators Peshawar road campus | 41 | |
Islamic International Medical College | 67 | |
Cambridge School System | 23 | |
Govt. Denny’s Higher Secondary School | 131 | |
Islamabad | CIIT | 29 |
FAST University | 50 | |
Islamabad Medical and Dental College | 64 | |
International Islamic University | 62 | |
Preston University | 95 | |
Old residential area | ||
Rawalpindi | Khayaban Sir Syed | 75 |
Jhanda Chichi | 68 | |
Shamsabad | 112 | |
Rehmanabad | 104 | |
Sadiq Abad | 107 | |
Modern residential area | ||
Rawalpindi | Satellite Town | 108 |
Scheme-2 | 110 | |
Civil Lines | 33 | |
Fazaia Colony | 51 | |
Babar Colony | 15 | |
Commercial area | ||
Islamabad | Blue Area | 22 |
Rawalpindi | City Saddar Road | 30 |
Commercial Market | 36 | |
Bus stations | ||
Rawalpindi | Sowan | 109 |
Pir Wadhi Moor | 92 | |
Kachehri Chowk | 71 | |
Ammar Chowk | 134 | |
Missile Chowk | 135 | |
Committee Chowk | 37 | |
Chandni Chowk | 27 | |
Airport | 1 | |
Liaquat Bagh Chowk | 81 | |
Islamabad | Golra Mor | 55 |
Faizabad Bridge | 49 | |
Play/recreational grounds | ||
Rawalpindi | Community Park | 38 |
Shah Baloot Park | 111 | |
Nawaz Sharif Park | 88 | |
Ayub Park | 14 | |
Liaquat Bagh | 80 | |
Jinnah Park | 70 | |
Race Course | 97 | |
Biodiversity Park | 21 | |
Islamabad | Pir Sohawa | 133 |
Virsa Café | 125 | |
Semi-rural area | ||
Rawalpindi | Morgah | 85 |
Misrial | 83 | |
Gujar Khan | 129 | |
Ali Pur Farash | 9 | |
Khanna | 74 | |
Islamabad | Choor Chowk | 28 |
Chak shehzad | 24 |
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Ahmad, S.S., Aziz, N. Spatial and temporal analysis of ground level ozone and nitrogen dioxide concentration across the twin cities of Pakistan. Environ Monit Assess 185, 3133–3147 (2013). https://doi.org/10.1007/s10661-012-2778-7
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DOI: https://doi.org/10.1007/s10661-012-2778-7