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Table 6 Proximity measures to major and minor industrial sources.

From: Spatiotemporal air pollution exposure assessment for a Canadian population-based lung cancer case-control study

Proximity Measure # of People Exposeda # of Years Exposed (Mean ± SD) # of Facilities (Mean &#177 SD) Emissionsb(tonnes) (Mean ± SD)
Major Industries
≤ 1 km 838 1.6 (5.3) 6.2 (5.5) 4.5e5 (3.6e7)
≤ 2 km 1995 4.3 (8.2) 13.3 (11.6) 4.5e5 (3.5e7)
≤ 3 km 2743 6.4 (9.5) 21.3 (18.6) 1.9e3 (1.6e4)
Minor Industries
≤ 1 km 4137 11.4 (11.2) 32.6 (59.3) -
≤ 2 km 5515 16.7 (10.0) 115.7 (163.2) -
≤ 3 km 5942 18.9 (9.0) 218.0 (303.8) -
  1. a Number of individuals living > 1 year within 1/2/3 km of a major or minor industrial source
  2. b Summary of facility emissions > 0 tonnes. Only available for major industries