We monitored formaldehyde, ammonia and emissive niton in indoor air of hospital, office and new residence.The result showed that foraldehyde is the main pollution index.

• 本文通过对洛阳市的医院、办公室、居民新居空气中甲醛、氨、放射性氡的监测,结果表明甲醛为主要污染因子。