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Table 1 Sri Lankan air quality standards

From: Air pollution and health in Sri Lanka: a review of epidemiologic studies

Air pollutant Average time Sri Lankan standard (μg/m3)
Carbon monoxide 8 hr 10000
  1 hr 30000
  Any time 58000
Nitrogen dioxide 24 hr 100
  8 hr 150
  1 hr 250
Sulfur dioxide 24 hr 80
  8 hr 120
  1 hr 200
Ozone 1 hr 200
Lead Annual 0. 5
  24 hr 2
SPM Annual 100
  24 hr 300
  8 hr 350
  3 hr 450
  1 hr 500
PM2.5 24 hr 50
  Annual 25
PM10 24 hr 100
  Annual 50