Ammonia in Poultry Housing and Welfare

Ammonia from poultry litter is a significant environmental welfare stressor that causes respiratory disease, eye damage, and chronic discomfort in commercial poultry.

Key Facts

Ammonia concentrations above 25 ppm cause measurable eye and respiratory damage in poultry
Broiler farms commonly have ammonia levels above 50 ppm during winter months with reduced ventilation
Chronic ammonia exposure reduces feed intake, growth, and immune function in broilers and laying hens
Effective litter management and ventilation can maintain ammonia below 20 ppm even in winter
UK welfare codes set a maximum recommended level of 20 ppm for poultry housing

Welfare Considerations

Ammonia build-up in poultry housing is a chronic welfare stressor that is largely invisible to casual observation but causes measurable damage to the health and comfort of birds. Hens and broilers exposed to elevated ammonia develop conjunctivitis, respiratory irritation, and immune suppression that compound other welfare challenges in intensive systems. Litter management practices including turning, drying, and partial litter replacement can significantly reduce ammonia levels, while adequate ventilation systems provide the primary control mechanism. Compliance with recommended maximum levels requires investment in monitoring equipment and management attention that is not consistently applied across the industry.

What You Can Do

Support regulatory enforcement of ammonia limits in poultry housing welfare inspections
Advocate for ammonia monitoring requirements in poultry farm assurance standards
Choose poultry products from certified high-welfare systems with verified air quality management
Encourage food companies to audit ammonia levels in their poultry supply chains
Support research into cost-effective ammonia mitigation strategies for diverse poultry housing types