Environmental Protection Agency of USA has made great progress on this subject and its guidelines are referred as global benchmarks. More to discuss in next articles.
Here are the EPA guidelines
Basic Information on Pollutants and Sources of Indoor Air Pollution
- Asbestos
- Biological Pollutants
- Carbon Monoxide (CO)
- Cookstoves
- Formaldehyde/Pressed Wood Products
- Lead (Pb)
- Nitrogen Dioxide (NO2)
- Pesticides
- Radon (Rn)
- Indoor Particulate Matter
- Secondhand Smoke/ Environmental Tobacco Smoke
- Volatile Organic Compounds (VOCs)
- Wood Smoke
You can also download this file by WHO, which briefly explain this topic.