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Table 2 Summary of population, air pollution and temperature data by city

From: Air pollution in the week prior to delivery and preterm birth in 24 Canadian cities: a time to event analysis

City 2006 population PM2.5 (μg/m3)a NO2 (ppb)a O3 (ppb)a SO2 (ppb)a CO (ppm)a T (°C)a
N mean min max n mean min max n mean min max n mean min max n mean min max n mean min max
St John’s 100,646 3470 4.6 0.0 49.0 3040 7.8 0.1 57.8 3620 25.0 2.1 57.5 3105 2.5 0.0 19.7 3605 0.4 0.0 1.9 3655 6.2 −15.3 24.6
Saint John 68,043 3350 6.8 0.0 109.1 3575 7.4 0.0 59.4 3655 25.0 3.0 72.7 3645 4.4 0.0 63.9 3510 0.5 0.0 3.3 3655 5.6 −23.4 23.6
Fredericton 50,535 3365 5.9 0.0 42.0 3190 4.9 0.0 34.8 3460 24.6 2.4 56.1 0 . . . 3470 0.3 0.0 1.9 3645 6.7 −23.8 28.2
Quebec 491,142 3360 10.1 0.0 111.9 3465 12.8 0.4 56.9 3655 21.1 1.0 57.2 3440 2.1 0.0 26.4 3480 0.4 0.0 2.6 3655 5.3 −28.2 28.5
Trois Rivieres 126,323 3540 9.7 0.0 66.3 0 . . . 3460 21.2 0.7 58.5 3630 3.0 0.0 36.5 0 . . . 3655 6.0 −27.3 28.5
Montreal 1,620,693 3650 11.4 0.0 83.4 3655 18.3 3.8 57.9 3655 19.1 0.9 68.0 3640 4.4 0.0 28.4 3655 0.4 0.0 2.1 3655 7.3 −26.4 29.2
Ottawa 812,129 3435 8.5 0.0 70.0 3575 14.7 0.0 57.0 3635 22.8 0.8 66.2 3640 2.4 0.0 17.0 3640 0.5 0.0 2.0 3655 7.0 −26.7 30.4
Oshawa 141,590 3610 9.8 0.0 63.5 3180 15.3 0.3 52.9 3610 25.1 2.5 66.5 610 3.3 0.0 16.4 365 0.7 0.0 2.1 3655 8.6 −21.0 29.0
Toronto 2,503,281 3655 10.6 0.0 64.9 3650 21.9 4.8 62.3 3650 21.7 2.4 65.6 3650 3.2 0.0 19.6 3645 0.6 0.0 2.5 3655 9.2 −19.6 30.3
Mississauga 668,549 3580 10.1 0.0 67.8 1855 19.8 3.2 58.9 3590 22.6 0.7 75.6 2670 3.4 0.0 42.0 2245 0.7 0.0 2.7 3655 8.9 −20.3 31.5
Brampton 433,806 3070 9.9 0.0 69.2 3035 16.2 1.8 58.1 3085 25.6 0.5 78.5 2365 2.1 0.0 17.4 1590 0.8 0.0 3.0 3655 8.3 −20.5 30.8
Hamilton 504,559 3595 11.5 0.0 64.2 3575 17.7 1.0 62.6 3595 23.8 0.0 84.6 3580 5.1 0.0 35.6 3335 0.5 0.0 2.0 3655 8.2 −19.6 29.6
St. Catharines 131,989 3555 10.2 0.0 63.5 2515 13.9 2.1 77.6 3555 24.3 0.0 81.0 1705 2.9 0.0 19.2 1305 0.3 0.0 1.4 3655 9.7 −15.0 30.0
Kitchener 204,668 3360 9.8 0.0 67.8 3305 12.2 0.8 53.2 3580 26.4 0.8 82.7 2080 2.9 0.0 16.8 1750 0.4 0.0 1.6 3650 7.3 −22.0 30.0
Windsor 216,473 3475 11.9 0.5 68.0 3490 18.4 2.9 55.7 3590 22.7 0.5 76.9 3590 5.9 0.0 30.5 3365 0.4 0.0 2.4 3655 10.6 −16.8 31.5
Winnipeg 633,451 3650 7.1 0.0 36.8 3650 11.8 1.1 39.3 3655 19.9 1.2 51.0 0 . . . 3645 0.4 0.0 1.6 3640 4.6 −33.0 30.0
Calgary 988,193 3635 9.1 0.7 90.7 3655 21.3 4.9 63.7 3655 18.9 0.6 51.1 3625 2.1 0.0 14.2 3655 0.5 0.2 2.4 3655 4.9 −31.6 24.7
Edmonton 730,372 3655 9.3 0.0 74.0 3650 20.8 3.2 62.9 3653 18.4 0.5 48.6 0 . . . 3655 0.5 0.1 2.7 3655 4.0 −34.7 26.5
Richmond 174,461 3570 6.8 0.0 44.0 3655 16.7 3.6 40.5 3655 15.2 0.3 44.9 3580 1.0 0.0 4.5 3655 0.5 0.1 2.3 3655 10.6 −8.6 24.2
Vancouver 578,041 3565 6.9 1.0 36.3 3655 22.5 4.7 43.2 3655 10.0 0.0 37.5 3655 3.3 0.0 18.1 3655 0.6 0.1 2.4 3655 11.1 −7.0 25.0
Victoria 78,057 3160 7.3 0.0 37.9 2770 11.1 0.5 30.9 3215 17.9 0.2 46.4 2945 1.3 0.0 16.5 3055 0.5 0.0 2.1 3650 10.2 −7.2 26.7
Nanaimo 78,692 3620 5.5 0.0 24.5 865 8.4 1.1 20.1 3600 19.2 0.1 45.0 1055 1.0 0.0 3.8 0 . . . 3655 10.4 −11.0 27.0
Kamloops 80,376 3595 6.9 0.0 140.0 3545 10.6 0.1 38.2 3600 20.9 0.0 52.4 3645 0.5 0.0 5.4 2895 0.2 0.0 1.4 3655 9.4 −24.2 29.8
Kelowna 106,707 3590 6.9 0.0 186.0 3345 9.0 0.2 35.3 3615 21.0 0.0 51.1 2915 0.2 0.0 2.8 2915 0.3 0.0 1.7 3650 8.9 −24.2 28.5
  1. a24 h average values