Mercer County
 
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
 
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)
35 
Good
Health Message: None
Air Quality Index (AQI)
45 
Good
Health Message: None
AQI - Pollutant Details
Ozone
35 
Good
Ozone
45 
Good
Forecast Discussion: Current Conditions: As of 2 PM on Friday, mostly cloudy skies prevail across the region as the storm system, which produced rain over portions of western PA on Thursday and early Friday, continues to track off to our north and east. Right now, moderate westerly winds are allowing temperatures to rise into the 60s. The cloud cover and cooler than normal temperatures are helping to hold ozone concentrations within the good range. Expect the good air quality to persist through the holiday weekend as the weather pattern remains unsettled early on. Now onto to the day-to-day details... *** The Holiday Weekend Forecast: On Saturday, expect mostly cloudy skies to persist as a frontal system, which began to develop over the Midwest on Friday, begins to slide east across the Ohio Valley. The presence of this front will steer our winds out of the south, allowing temperatures to rise through the 60s to near 70. The southerly winds will also increase humidity, thus increasing the chance of late day isolated shower or thunderstorm over the area. Overall, it will be the cloud cover that will limit ozone production to the good range. By Sunday, overcast skies will persist over the area as the frontal system to our west moves closer. As a result, expect an even higher chance of showers and possibly a thunderstorm. Temperatures will rise to near normal levels as ozone remains in the good category. On Memorial Day, clouds in the morning will give way to peaks of sunshine by the afternoon as higher pressure briefly makes an appearance. The addition of afternoon sunshine should force ozone levels near the good / moderate threshold while allowing temperatures to stay in the low 70s. For Tuesday, expect more clouds to move in as an upper level low builds in north of the Great Lakes. This low pressure system will keep a level of instability over our area (which is why the clouds will increase and so will the chance of showers). It is this cloud cover that will not only limit temperatures to the low 70s but also keep ozone from rising out of the good category. --Nolan

Current Conditions
Air Quality Index (AQI)
observed at 16:00 EDT
68
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
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 44 Good
Particles (PM2.5) 68 Moderate

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