9 Warning Signs That Your Home Has Poor Air Quality Cough and Congestion. One of the biggest factors in whether or not air quality is considered poor is the concentration of particles it contains. ... Fatigue and Dizziness. ... Frequent Illness. ... Headache. ... Hyperactive Allergies. ... Mucus Membrane Irritation. ... Nausea. ... Respiratory Issues. More items... Mar 11, 2016