What are biological pollutants?

Biological pollutants refer to indoor air pollutants that originate from living sources, such as bacteria, mold, pollen, pet dander, and dust mites. These substances can significantly affect indoor air quality and may lead to various health issues, particularly respiratory problems and allergies. Since they come from natural biological processes, they are distinct from chemical pollutants, which involve synthetic or man-made substances.

The focus on living sources is what makes this definition critical in understanding the impact of biological pollutants. While chemicals and particles can alter air quality and may contribute to health problems, they do not constitute biological pollutants unless they originate from a living organism. Thus, recognizing the source of these pollutants as biological entities is vital for proper identification and mitigation strategies in environments like homes and workplaces.