Dust and Air Quality in Poultry and Pig Housing

How high dust concentrations in livestock buildings affect animal respiratory health and welfare, and management approaches to reduce exposure.

Key Facts

Poultry housing can have dust concentrations 100-1000 times higher than outdoor air
Dust contains organic matter, bacteria, fungi, and endotoxins that cause respiratory inflammation
Chronic respiratory exposure reduces immune function and increases disease susceptibility
Ventilation design significantly affects dust levels but many systems are inadequate
High dust concentrations also affect stockperson respiratory health, creating shared welfare interest

Welfare Considerations

Dust in livestock housing is a chronic welfare hazard that causes progressive respiratory inflammation and disease vulnerability in birds and pigs. Animals breathing high dust concentrations daily show elevated respiratory tract inflammation, impaired mucociliary clearance, and increased susceptibility to respiratory disease. Unlike acute harms, chronic dust exposure effects are invisible on a day-to-day basis but accumulate into significant welfare harms over the production cycle. Good ventilation design, litter management to reduce dust generation, and stocking densities that minimize disturbance are the primary interventions.

What You Can Do

Support farms demonstrating good air quality management practices
Advocate for air quality standards in livestock welfare certification
Support stockperson health monitoring programs that also protect animal welfare
Raise dust as a welfare and occupational health issue in livestock farming
Support research into low-dust alternative bedding materials and housing designs