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Air Quality Action Day, Dec. 20

A(n) Air Quality Action Day has been declared for Susquehanna Valley, PA, on Sunday, Dec 20
Tomorrow’s Forecast
Sunday, Dec 20: 103 AQI Unhealthy for Sensitive Groups Particle Pollution (2.5 microns)

Extended Forecast
Monday, Dec 21: 64 AQI Moderate Particle Pollution (2.5 microns)
Tuesday, Dec 22: 39 AQI Good Particle Pollution (2.5 microns)
Current conditions: An Air Quality Action Day is effect for the day Sunday. Stagnant surface winds, a moderately strong inversion, and snow cover will all act to bring fine particulate matter (PM2.5) concentrations to the code ORANGE range Sunday. Concentrations will be highest during the morning hours, and then fall some during the afternoon with a slight south wind. The day will turn out mostly cloudy with only a rain or snow shower. *** Monday’s forecast: Another weak weather system will bring a rain or snow shower later Monday or Monday evening with enough low level mixing from the south and southwest to where only moderate PM2.5 concentrations are expected. *** Extended forecast: Better air quality in the good range is expected by Tuesday, as a northwesterly flow will increase and be rather brisk in the afternoon. High pressure builds back in by Wednesday, but then a strong cold front brings rain to the area Christmas eve. A blast of very cold air will then follow for Christmas day and Saturday. Air quality should be in the good range Wednesday through Saturday.—McAuliffe


Residents and businesses within the ozone Air Quality Action Day area are strongly encouraged to voluntarily help reduce air pollution by:

• Conserving electricity by setting air conditioning to a higher temperature;
• Combining errands to reduce vehicle trips;
• Limiting engine idling; and
• Refueling cars and trucks after dusk.

Days when particle pollution levels are expected to be high:

* Reduce or eliminate fireplace and wood stove use.
* Avoid using gas-powered lawn and garden equipment.
* Avoid burning leaves, trash and other materials.

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Clean Air is Good for Birds too

Study: Air pollution laws aimed at human health also help birds

U.S. pollution regulations meant to protect people from dirty air are also saving North America’s birds, according to a new study. Improved air quality under a federal program to reduce ozone pollution may have averted the loss of 1.5 billion birds during the past 40 years, the study found. That’s nearly 20% of bird life in the United States today.  Read more.

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PurpleAir increases our knowledge of air quality

Our PurpleAir network helps us understand local air pollution.  PurpleAir provides continuous monitoring for particulate pollution.  Read our Guest Editorial in Cumberlink.

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Western Wildlifes – the effect on public health

View the recent CAB Zoom meeting where we discuss the air pollution caused by western wildfires and the readings at air quality monitors around major cities on the west coast.

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Wildfires can affect air hundreds of miles away

Wildfires can cause temporary large increases in outdoor airborne particles, and substantial increases in gaseous air pollutants such as carbon monoxide, nitrogen dioxide, formaldehyde, and acetaldehyde.  Large wildfires can increase air pollution over thousands of square kilometers [or thousands of square miles].,acetaldehyde%20%5B40%2D43%5D.

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PurpleAir Can Warn of Hazardous Air

I Live in California. How Do I Know It’s Safe to Go Outside?

A high-tech sensor network brought me closer to the natural cycles of my environment.

NY Times, Sept. 4, 2020.


Contributing Opinion Writer

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DEP issues a Code Orange Air Quality Action Day for ozone for Monday, August 10, 2020

 The Pennsylvania Department of Environmental Protection (DEP) has issued a Code Orange Air Quality Action Day for ozone for Monday, August 10, 2020, for the counties of Bucks, Chester, Delaware, Montgomery, and Philadelphia in southeastern Pennsylvania, the counties of Cumberland, Dauphin, Lancaster, Lebanon, and York in southcentral Pennsylvania, and the counties of Allegheny, Armstrong, Beaver, […]

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CAB installs PM2.5 monitor

The Clean Air Board announced that it has installed a new air quality monitor in downtown Carlisle near the Square.  The PM2.5 sensor will report its readings 24 hours a day.  The real-time data can be viewed on the PurpleAir network.  The PurpleAir™ sensor is a device that uses two laser particle counters to capture and record data about microscopic particulate matter (PM2.5) suspended in the air.  The sensor uses WiFi connectivity to display real-time air quality readings on the PurpleAir™ Map, which is a  world-wide map of monitors where data can be shared with the public.

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More than a dozen states unite to boost electric trucks

Washington Post, July 14, 2020. By Dino Grandino. More than a dozen states are teaming up to boost sales of pickup trucks, school buses and big rigs that run entirely on electricity and do not pump climate-warming pollution into the air. Leaders from Massachusetts, New Jersey, New York, North Carolina, Pennsylvania and 10 other states, […]