Helena Joyce
Pennsylvania is one of the most polluted states in the US, with several of its cities ranking among the worst in the country for particle pollution. The Pittsburgh metropolitan area remains the worst city for short-term and annual particle pollution in the region. The state is a significant source of greenhouse gases, with industrial facilities and power plants being the biggest polluters. In 2020, industrial facilities were responsible for 31% of the state's total emissions, and metals and minerals were the top industrial sources of greenhouse gases. The air quality in Pennsylvania is affected by various pollutants, including nitrogen dioxide, sulfur dioxide, and volatile organic compounds (VOCs), which pose risks to public health.
| Characteristics | Values |
|---|---|
| Air pollution ranking in the U.S. | Ranked among the most polluted states |
| Cities with the worst air pollution | Pittsburgh, Lancaster, Coraopolis, Boiling Springs, Bethlehem, Emmaus, Bakerstown |
| Air pollutants | Nitrogen dioxide, sulfur dioxide, VOCs, particulate matter (PM2.5), ozone |
| Sources of air pollution | Vehicle emissions, factories, combustion, industrial facilities, power plants, mines |
| Health impacts | Respiratory and cardiac problems, premature death, hospital admissions, asthma attacks, bronchitis |
| Climate change impacts | More extreme heat waves, extreme rainfall, drought, higher flood risk |
| Greenhouse gas emissions | Carbon dioxide, methane |
| Top industrial sources of GHG emissions | Metals and minerals |
| Efforts to improve air quality | PennFuture's work to protect and improve air quality |
Explore related products
What You'll Learn
Pennsylvania's air pollution
Pennsylvania is one of the most polluted states in the US, with over 12.8 million residents and a significant industrial presence. The state has a large number of vehicles on the road, as well as several industrial facilities, power plants, mines and other large polluters, all of which contribute to its poor air quality.
A report by the American Lung Association, released in April 2023, graded Americans' exposure to unhealthy levels of ozone air pollution and fine particulate pollution over a three-year period from 2019 to 2021. The report found that Pennsylvania was home to the only two eastern cities in the top 25 most polluted metropolitan areas: Pittsburgh and Lancaster. Both cities posted a high number of days with fine particle pollution. Pittsburgh, in particular, ranked as the worst in the nation for short-term particle pollution east of Denver, Colorado.
The state's air quality is impacted by a range of pollutants, including nitrogen dioxide (NO2) and sulfur dioxide (SO2), which are released from vehicles, factories, and combustion processes. These pollutants can form ozone (O3), commonly known as smog, when exposed to solar radiation. Pennsylvania is also one of the largest sources of greenhouse gases in the US, with industrial facilities and power plants being the biggest contributors. The state's "'Dirty Dozen", a group of 12 large GHG emitters, produce nearly one-fifth of the state's total climate pollution.
The impact of air pollution in Pennsylvania is not limited to a single area. Pollution hotspots can affect people living nearby and far away, as smoke and haze can be blown over vast distances by the wind. The state's residents are at risk of pollution-related health problems, and the poor air quality has a significant impact on their living conditions.
Ocean Pollution: A Global Crisis
You may want to see also
Explore related products
Major sources of pollution
Pennsylvania is one of the largest sources of greenhouse gases in the United States, with carbon dioxide being the most prevalent, largely due to the burning of fossil fuels and methane. The state's large population of over 12.8 million people, significant industrial activities, and agricultural sector contribute to its elevated pollution levels.
The "Dirty Dozen"—12 large industrial facilities, power plants, mines, and other major polluters—are responsible for nearly one-fifth of Pennsylvania's total climate pollution. In 2020, industrial facilities alone emitted 76.9 million metric tons of greenhouse gases, accounting for 31% of the state's total emissions. Half of the "Dirty Dozen" facilities are located in southwestern Pennsylvania, which accounted for 44% of greenhouse gas emissions reported by large polluters in 2021.
The Pittsburgh and Southwest region is home to the greatest number of facilities reporting emissions, with 88 out of 287 facilities, or about 30%. These industrial facilities release greenhouse gases, particulate soot, toxic air pollutants, and smog-forming pollutants, posing immediate health risks to the public. The Pittsburgh area ranks 14th worst in the country for year-round emissions of particulate pollution. Metals and minerals are the top industrial sources of greenhouse gases in the state.
Vehicle emissions also contribute significantly to air pollution in Pennsylvania. Nitrogen dioxide, released primarily from vehicles, can convert into ozone under certain conditions, leading to the formation of smog. Additionally, heavy-duty vehicles such as buses, trucks, and lorries, which often run on fossil fuels like diesel, contribute more pollution than smaller vehicles. Factory emissions, industrial areas, and power plants are other significant sources of pollution in the state, often utilising their own fossil fuels like coal, which further contributes to pollution when combusted for energy.
Some of the prominent pollutants in Pennsylvania's air include nitrogen dioxide, sulfur dioxide, and volatile organic compounds (VOCs) such as toluene, xylene, methylene chloride, ethylene glycol, and benzene. These pollutants are harmful to human health and can spread over large areas, affecting people far from their original sources.
Cars: Major Polluters on the Road
You may want to see also
Explore related products
Worst-polluted cities in Pennsylvania
Pennsylvania is one of the most polluted states in the US, with a significant presence in sectors such as steel production, paints and other household materials, food products, and agriculture. The state is also one of the largest sources of greenhouse gases, with industrial facilities and power plants being the biggest contributors.
A 2019 report by the American Lung Association found that five Pennsylvania cities were among the top 25 in the country in terms of year-round particle pollution. These cities were Pittsburgh, Lancaster, Johnstown, Scranton-Wilkes-Barre, and East Stroudsburg. Pittsburgh, in particular, has historically struggled with poor air quality, with photographs from the 1900s showing lit-up storefronts during the middle of the day due to the thick air pollution.
The Pittsburgh and Southwest region is home to the greatest number of facilities reporting their emissions to the EPA, with 88 out of 287 facilities statewide. This region also houses half of Pennsylvania's "Dirty Dozen"—the 12 largest emitters of greenhouse gases in the state. The U.S. Steel Edgar Thomson plant in Allegheny County, part of the Dirty Dozen, emitted 3.8 million metric tons of GHGs in 2021, equivalent to the CO2 emissions from burning 4 billion pounds of coal.
Other cities in Pennsylvania with high levels of pollution include Boiling Springs, Bethlehem, Emmaus, and Bakerstown. These cities had PM2.5 readings above 11 μg/m³, placing them in the 'moderate' ratings bracket for air pollution.
The main pollutants found in Pennsylvania's air are nitrogen dioxide (NO2) and sulfur dioxide (SO2), released primarily from vehicles and factories. When NO2 and other chemicals react with solar radiation, they can form large amounts of ozone or smog, which is more common during summer due to increased sunlight and vehicle movement. Other harmful pollutants include black carbon, a component of soot, and volatile organic compounds (VOCs) like toluene, xylene, and benzene.
Steppe Biome's Carbon Dioxide Pollution: Origins and Culprits
You may want to see also
Explore related products
Greenhouse gases and climate pollution
Pennsylvania is one of the largest sources of greenhouse gases in the US. In 2020, it was the fourth-largest greenhouse gas-emitting state in the country. The commonwealth's climate has undergone a long-term warming of more than 1° C (1.8° F) over the past 110 years, and there has also been a 10% increase in precipitation.
The state's greenhouse gas emissions are largely driven by industrial facilities and power plants. In 2020, industrial facilities were responsible for 76.9 million metric tons of GHGs (carbon dioxide equivalent)—31% of the state's total emissions. The industrial and electric power sectors combined contributed to 60% of Pennsylvania's GHG total. In 2021, 287 large facilities reported their greenhouse gas emissions to the EPA, with most of them being industrial facilities and power plants. These facilities released a total of 110.9 million metric tons of GHGs, equivalent to about 45% of the state's GHG emissions in 2020.
Just 12 large GHG emitters in Pennsylvania, dubbed the "Dirty Dozen," produce nearly one-fifth of the state's climate pollution. These facilities emitted nearly 46 million metric tons of GHGs in 2021, equivalent to 18% of the state's total GHG emissions in 2020. All but one of the Dirty Dozen facilities are power plants. The top two emitters, the Keystone and Conemaugh coal-fired power plants, released a combined 14 million metric tons of greenhouse gases in 2021. Five of the Dirty Dozen are gas-powered power plants that have opened since 2018, demonstrating the limitations of transitioning from coal to gas-fired power generation for reducing climate pollution.
The Pittsburgh and Southwest region is home to the greatest number of facilities reporting emissions to the EPA, with 88 out of 287 facilities, or about 30%. This region ranks 14th-worst in the country for year-round emissions of particulate pollution. Industrial facilities, aside from power plants, are also major sources of greenhouse gases. Metals and minerals are the top industrial sources of GHGs.
To address climate pollution, Pennsylvania submitted its Priority Climate Action Plan to the EPA in 2024, outlining nine key actions to reduce statewide greenhouse gas emissions. The plan aims to secure a share of the $4.6 billion available from the EPA for local governments and municipalities to implement climate action. Additionally, the federal Inflation Reduction Act of 2022 provides funding to help industrial sectors reduce their emissions.
China's Manufacturing Pollution: Global Impact and Responsibility
You may want to see also
Explore related products
Health risks of pollution
Pennsylvania is one of the most polluted states in the US. The state is a major source of greenhouse gases, with industrial facilities and power plants being the biggest contributors. The air in Pennsylvania is polluted by nitrogen dioxide, sulfur dioxide, ozone, and particulate matter, all of which are dangerous to human health.
Air pollution is the presence of contaminants in the atmosphere, such as dust, fumes, gases, and smoke, in quantities that can be harmful to human health. The main pathway of exposure is through the respiratory tract, but some pollutants are small enough to enter the bloodstream and affect almost every organ in the body. The health risks of pollution include:
- Inflammation and Oxidative Stress: Exposure to air pollution can cause inflammation and oxidative stress in human cells, which may lead to chronic diseases.
- Respiratory Problems: Pollutants can cause respiratory issues such as reduced lung function, respiratory infections, aggravated asthma, and chronic obstructive pulmonary disease (COPD).
- Cardiovascular Issues: Air pollution has been linked to cardiac problems, including an increased risk of stroke and heart disease.
- Cancer: Particulate matter, nitrogen dioxide, and benzene are all associated with an increased risk of cancer. Air pollution has been classified as a human carcinogen by the International Agency for Research on Cancer of the World Health Organization (WHO).
- Neurological Impacts: There is evidence that air pollution may affect neurological development in children and increase the risk of cognitive impairment and neurological diseases in adults.
- Pregnancy and Birth Outcomes: Pregnant women exposed to air pollution are at a higher risk of hypertensive disorders, which can lead to pre-term birth, low birth weight, and other adverse outcomes.
- Other Health Issues: Air pollution has also been linked to diabetes, obesity, Alzheimer's disease, and dementia.
Plastic Pollution: Our Oceans' Plight and Fight
You may want to see also
Frequently asked questions
Pennsylvania is one of the most polluted states in the US. In 2023, Pennsylvania was ranked 2nd for the highest number of cities with poor air quality.
The cities of Pittsburgh and Lancaster are the most polluted in Pennsylvania. Other cities with high pollution levels include Coraopolis, Bethlehem, Emmaus, and Bakerstown.
Industrial facilities and power plants are the biggest sources of pollution in Pennsylvania. The state is also home to "Pennsylvania's Dirty Dozen"—12 large industrial facilities and power plants that produce nearly one-fifth of the state's climate pollution.
The pollution in Pennsylvania has been linked to various health issues, including respiratory and cardiac problems such as asthma attacks, bronchitis, and hospital admissions.
