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Table 2 Fine particulate levels in indoor settings in various studies (some of which were before and after studies around local or national smokefree laws)

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

Settings Legally non-smoking settings (Mean PM2.5 in μg/m3) Settings with smoking permitted (Mean PM2.5 in μg/m3)
Ireland: pubs [28] 6 36
Boston, Massachusetts (USA): bars [29] 8* 179*
Austin, Texas: bars [30] 11 151
Delaware (USA): bars/restaurants (US)** [10] 11 160
New Zealand: All pubs, bars, & restaurants in this study 16 --
Malaysia: bars, nightclubs and discos [31] 22 537
Western New York (USA): bars/restaurants [7] 25 324
Thailand: bars, nightclubs and discos [31] 27 661
20 US states & Puerto Rico: hospitality venues (n = 790) [32] 28 273
Germany: bars/discos (median values) [33] -- 195/869
North West England: pubs [8] -- 286
24-country study of 932 indoor venues [4] -- 317
  1. * Actually "PM3.5", though this is closely related to PM2.5 as described in this study.
  2. ** Based on the six bars/restaurants (and excluding the casino and pool hall).