Broiler Chicken Ammonia Exposure: Air Quality and Respiratory Welfare

Ammonia from poultry litter accumulates in broiler sheds and causes serious respiratory and ocular damage. Managing air quality is a critical but often neglected aspect of broiler welfare.

Key Facts

Broiler sheds can contain ammonia levels of 20-80 ppm, far above the 25 ppm threshold for welfare harm
Chronic ammonia exposure causes corneal damage, respiratory inflammation, and reduced immune function
Litter management, ventilation rates, and stocking density all influence ammonia accumulation
Ammonia-damaged birds show reduced activity, poor feed conversion, and increased mortality
Some countries legally limit ammonia in poultry housing but enforcement is inconsistent

Welfare Considerations

Ammonia exposure in broiler sheds is a chronic welfare insult that affects millions of birds daily. Eye damage from ammonia causes pain and impaired vision; respiratory damage increases susceptibility to respiratory disease. These effects are often invisible to casual observers but measurable through mortality rates and pathological examination at slaughter. Better litter management — drier litter, zeolite additives, more frequent removal — reduces levels. Higher ventilation rates help but increase energy costs. Reducing stocking density is the most effective single intervention. Welfare certification schemes are beginning to specify maximum ammonia levels.

What You Can Do

Support broiler welfare certification that includes air quality and ventilation standards
Reduce chicken consumption or choose higher-welfare certified products
Advocate for legally binding ammonia limits in commercial poultry housing
Support research into cost-effective litter management strategies that reduce ammonia
Ask retailers about the air quality monitoring standards on their broiler supply farms