Lehigh Valley
 
Data and Forecasts courtesy of:
 

 
AQI: Good (0 - 50) AQI: Good (0 - 50)
Air quality is considered satisfactory, and air pollution poses little or no risk.
AQI: Moderate (51 - 100) AQI: Moderate (51 - 100)
Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
AQI: Unhealthy for Sensitive Groups (101 - 150) AQI: Unhealthy for Sensitive Groups (101 - 150)
Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air.
AQI: Unhealthy (151 - 200) AQI: Unhealthy (151 - 200)
Everyone may begin to experience health effects members of sensitive groups may experience more serious health effects.
 AQI:Very Unhealthy (201 - 300) AQI: Very Unhealthy (201 - 300)
Health alert: everyone may experience more serious health effects.
AQI: Hazardous(301 - 500) AQI: Hazardous (301 - 500)
Health warnings of emergency conditions. The entire population is more likely to be affected.
Action DayAction Day
 
Local Air Quality Resources
Air Quality Action Day Program | Current Air Quality Index | Forecast
 
State Air Quality Resources
Air Quality Partnership of Lehigh Valley - Berks
Air Quality Partnership of the Delaware Valley
Air Quality Partnership of the Susquehanna Valley
American Lung Association (ALA) of Pennsylvania
PA Allergy & Asthma Association
Pennsylvania DEP - BAQ - Contacts
Pennsylvania DEP - BAQ - Current Air Quality Index (AQI) by Area
Pennsylvania DEP - Bureau of Air Quality (BAQ)
Pennsylvania DEP – Air Quality Forecast Home Page
Pennsylvania DEP – Home Page
Southwest PA Air Quality Partnership
 
Data and Forecasts courtesy of:
Air Quality Forecast
Today's High Tomorrow's High
Air Quality Index (AQI)
45 
Good
Health Message: None
Air Quality Index (AQI)
53 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
AQI - Pollutant Details
Ozone
45 
Good
Particles (PM2.5)
39 
Good
Ozone
47 
Good
Particles (PM2.5)
53 
Moderate
Forecast Discussion: Saturday’s Forecast: A disturbance passing through the region will bring a chance for some precipitation to fall across the region yet again on Saturday. The active pattern continues, which has helped to limit ozone and mostly limit PM-2.5 concentrations to the good range much of this past week. Good air quality will continue Saturday with more clouds than sunshine, especially during the afternoon hours, that will limit ozone formation. Lighter winds than Friday will allow for some rise in PM-2.5 concentrations, but those values will likely peak in the high end of the good range. Temperatures will reach the upper 60s, which is several degrees cooler than typical highs over Memorial Day weekend. *** Sunday’s Forecast: Temperatures will rebound to near normal values in the mid to upper 70s on Sunday despite the cloud cover hanging around. Breezy southerly flow will limit particulate levels from climbing too high, but Sunday will be the best chance over the next few days for moderate PM-2.5 readings to occur. The cloud cover will still limit ozone formation so those values will again remain inside the good range. The next round of potential precipitation will approach the region late on Sunday, though best chances for showers will occur during the late evening to overnight timeframe. *** Monday’s Forecast: Mostly cloudy skies with scattered showers will dampen but will not likely washout any Memorial Day plans. With the showers late Sunday and continuing into Monday, PM-2.5 concentrations should fall back into the good range. Ozone concentrations will also remain at levels inside the good range. Temperatures will at least remain seasonable with highs again reaching the mid to upper 70s. *** Tuesday’s Forecast: Chances for showers will be a little bit lower than the days surrounding Tuesday, but once again we just can’t get a break from the unsettled conditions. Breezy westerly flow will continue the trend of limiting PM-2.5 concentrations to the good range. Temperatures will also continue a recent trend, and that is to reach the mid to upper 70s for the daily highs. Even with a little more sunshine than previous few days, ozone concentrations should still be limited to the good range on Tuesday. *** Extended Outlook: The active pattern will continue to send disturbances through the region for much of the remainder of the week. Daily chances for scattered showers and frequent changes to the air mass will prevent air quality conditions from deteriorating much. Ozone will remain mostly at levels inside the good range through much of the week. PM-2.5 concentrations will also remain mostly just inside the good range, though some brief periods of low moderate readings are possible. Temperatures should remain near seasonable with daily highs in the mid to upper 70s. --- Roble

Current Conditions
Air Quality Index (AQI)
observed at 16:00 EDT
35
Good
Health Message: None
Note: Values above 500 are considered Beyond the AQI. Follow recommendations for the Hazardous category. Additional information on reducing exposure to extremely high levels of particle pollution is available here.
AQI - Pollutant Details
Ozone 35 Good
Particles (PM2.5) 14 Good

Past Air Quality Maps and Data
Yesterday's Maps and Data
Air Quality Maps Archives (by region)

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