Farmed Animals

Pig Air Quality Welfare

Air quality inside intensive pig buildings affects respiratory health, eye health and overall welfare for the duration of the production cycle.

Key Facts

Pig barns can accumulate ammonia, hydrogen sulfide, dust and carbon dioxide to harmful levels
Respiratory disease is one of the most common causes of poor welfare and mortality in pigs
Ventilation system failures can cause rapid deterioration of air quality and mass mortality
Enrichment provision through bedded systems can inadvertently worsen air quality if not managed correctly

Welfare Considerations

Air quality is a chronic welfare determinant for pigs in intensive systems. High ammonia irritates respiratory tracts and eyes, causing persistent discomfort. Hydrogen sulfide at high concentrations causes unconsciousness and death. Dust particles carry pathogens that cause lung disease. Proper ventilation system design, monitoring and maintenance are essential welfare requirements that are sometimes overlooked until problems become acute.

What You Can Do

Support welfare standards requiring air quality monitoring in pig housing
Advocate for maximum ammonia and hydrogen sulfide levels in pig welfare regulations
Choose pork from operations with documented ventilation management protocols
Support research into low-emission pig housing design