For Guidance as of 10pm (321): PSI Descriptor General Health Effects 0 - 50 Good None 51 - 100 Moderate Few or none for the general population 101 - 200 Unhealthy Mild aggravation of symptoms among susceptible persons i.e. those with underlying conditions such as chronic heart or lung ailments; transient symptoms of irritation e.g. eye irritation, sneezing or coughing in some of the healthy population. 201 - 300 Very Unhealthy Moderate aggravation of symptoms and decreased tolerance in persons with heart or lung disease; more widespread symptoms of transient irritation in the healthy population. 301 - 400 Hazardous Early onset of certain diseases in addition to significant aggravation of symptoms in susceptible persons; and decreased exercise tolerance in healthy persons. Above 400 Very Hazardous PSI levels above 400 may be life-threatening to ill and elderly persons. Healthy people may experience adverse symptoms that affect normal activity. en.wikipedia.org/wiki/Pollutant_Standards_Index
Posted on: Wed, 19 Jun 2013 15:25:55 +0000