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Table 1 Fine particulate levels at various sites in Wellington and Wairarapa in 2006 (for recorded one minute sampling over 30-minute periods in each venue for PM2.5 in μg/m3)*

From: National smokefree law in New Zealand improves air quality inside bars, pubs and restaurants

Type of venue (n) Details (sampling strategy) Mean (SD) Median Minimum Maximum
Bar area (n = 8) Wellington Central Business District (CBD) (random selection) 22 (7) 19 10 56
Bars – more traditional (10) Wellington CBD (telephone directory) 13 (11) 8 2 94
Restaurants (8) Wellington CBD (random selection) 14 (7) 13 2 37
Rural pubs (8) Wairarapa (telephone directory for more traditional) 17 (21) 10 1 109
Outside of all the pubs/bars/restaurants (34) * Central Wellington & Wairarapa (as details in the first four rows of this table) 14 (14) 7 0 137
Smoking areas of bars/pubs/restaurants (4)** Wellington CBD (random selection) 36 (27) 19 7 189
Relatively enclosed smoking areas attached to bars (2)# Wellington CBD (purposeful sampling) 124 (83) 116 20 284
Transportation settings (10) * Wellington (convenience sample). Includes: buses (5), taxi, train, bus station, train station and airport. 13 (8) 11 1 62
Other indoor settings (9) Wellington (convenience sample). Includes: cafés (2), offices (2), hospital, library, club, shopping centre, and supermarket. 3 (2) 2 0 14
Other outside (6) Central Wellington (convenience sample). Includes: park (2), walkway (2), and roadside (2). 7 (4) 6 2 50
  1. * The sampling outside venues was for only five minutes and for some transport settings it varied by the length of the trip. But all the other results in this table are for 30 minute sampling periods.
  2. ** For those "outdoor" smoking areas that were fully occupied by at least one person (beside the investigator/s) throughout the 30 minute period and which had a least two cigarettes smoked during this time.
  3. # In two additional bars the smoking areas were not occupied at the survey time, and so these results are not included in this category.
  4. SD – Standard deviation.