January 2018 marks the 25th anniversary of the landmark EPA health assessment, Respiratory Health Effects of Passive Smoking: Lung Cancer and Other Disorders. The assessment concluded that tobacco smoke not only presents risks to the health of smokers but also to those around them. The science underpinning the assessment provided health officials and others the evidence needed to act in protecting people from exposure to secondhand smoke. The assessment's impact has been far-reaching and has led to healthier air, particularly indoor air, for millions of people.

• Reducing Exposure to Secondhand Smoke: US Progress Since EPA's 1993 Report (PDF)(4 pp, 486 K, January 2018)
  An overview of progress in reducing exposure to secondhand smoke in the 25 years since the 1993 landmark report
• Respiratory Health Effects of Passive Smoking (PDF)(525 pp, 4 MB)
  EPA's 1993 landmark report on the health effects of secondhand smoke.