What U.S. city has the dirtiest air?

The city with the worst air quality in the U.S. often depends on the specific pollutant measured, but Los Angeles-Long Beach, Bakersfield-Delano, and Visalia (all in California's Central Valley) consistently rank as the most polluted for ozone and particle pollution, with Bakersfield frequently cited as the worst for year-round particle pollution, notes the American Lung Association and U.S. News & World Report. Factors like wildfires, heavy traffic, industrial emissions, and agricultural dust contribute to these poor air quality levels, especially in Southern California.

Which US city has the worst air quality?

Los Angeles air pollution

Los Angeles has the most contaminated air in the country.

Which city has the most dirtiest air?

According to real-time AQI data, Delhi tops the list of India's most polluted cities, with an alarming AQI of 404, classified as "Hazardous." Alongside Delhi, other northern cities like Ghaziabad, Gurgaon, and Noida also struggle with severe air quality, especially during winter.

What states have the dirtiest air?

California, Nevada, Louisiana, Arizona, Ohio, Texas, and Pennsylvania often top lists for dirtiest air due to ozone, fine particles (PM2.5), wildfires, and industrial pollution, with California frequently leading in overall poor air quality and polluted cities, while Southern states like Georgia and Arkansas also struggle with particulate matter.
 

What are the 10 worst air polluted cities in the world?

The top 10 most polluted cities vary slightly by report and year, but consistently feature South Asian cities like Lahore (Pakistan), Delhi (India), and others in India (Bhiwadi, Patna, etc.), alongside cities like Hotan (China), N'Djamena (Chad), and sometimes Kabul (Afghanistan), often ranked by average PM2.5 (fine particulate matter) levels, with India dominating the lists in recent years. For instance, in recent data, Byrnihat (India) topped rankings, with Delhi, Lahore, and other Indian cities (Mullanpur, Faridabad) frequently appearing in the top 10 globally for severe air pollution.
 

The 5 Most Polluted Major Cities in America

Which is the no. 1 cleanest city in the world?

Copenhagen, Denmark: The cleanest city on the planet

Currently, the energy mix exceeds 30%, and it is expected to achieve energy independence by 2050. Notable features: Bicycle implementation: Copenhagen has 700,000 bicycles. 62% of its citizens use them.

What is the dirtiest place on Earth?

There's no single "dirtiest place," as it depends on the type of pollution, but Byrnihat, India, often tops lists for air pollution (PM2.5), while cities in India, Pakistan, and Bangladesh consistently rank poorly for air quality; places like Dallol, Ethiopia, are chemically toxic, and historical sites like Chernobyl remain radioactive, showing "dirtiness" varies from smog to chemical waste to radiation. 

What is the cleanest state in the USA?

Hawaii, Vermont, and Washington consistently rank as some of the cleanest U.S. states, excelling in air and water quality due to island isolation, strong environmental regulations, low population density, and renewable energy efforts, though rankings vary slightly by source focusing on air quality, water purity, or overall environmental friendliness.
 

What is the best state to breathe in?

Hawaii. The state of Hawaii boasts the cleanest average air in the entire U.S., at an AQI of 21.2.

What city has the purest air?

Rankings: 25 Cities with the Best Air Quality

• Zürich, Switzerland (0.7 µg/m3)
• Vitória, Brazil (2.2 µg/m3)
• Hobart, Australia (2.4 µg/m3)
• Halifax, Canada (3.8 µg/m3)
• Vancouver, Canada (3.8 µg/m3)
• Saint-Denis, Réunion (3.8 µg/m3)
• Surrey, Canada (4.0 µg/m3)
• Tampere, Finland (4.0 µg/m3)

What is the cleanest city in the USA?

There's no single "cleanest" city, as it depends on metrics, but Honolulu, HI often tops lists for air quality and natural beauty, while metro areas like Portland, OR and Seattle, WA score high for overall environmental factors, and Chicago, IL, is noted for effective street cleanliness due to its alleyways. Rankings vary, with some studies highlighting Hawaii's air, others focusing on garbage disposal, and some on specific programs like Portland's green initiatives or Chicago's alley system for hiding trash.
 

What is the top 10 most polluted city?

The top 10 most polluted cities globally are dominated by locations in South Asia, particularly India, Pakistan, and Bangladesh, with cities like Lahore (Pakistan), New Delhi (India), and Dhaka (Bangladesh) frequently topping lists for poor air quality (PM2.5), though real-time rankings vary, often showing Indian cities like Mainpuri, Greater Noida, and Bhiwadi with extremely high, hazardous levels. 

What is the most polluted zip code in the US?

Abstract. In 2017, The Denver Business Journal listed the 80216 zip code as the most polluted zip code in the United States.

What state is #1 in quality of life?

There isn't one single answer, as different reports rank states differently, but Vermont is frequently cited as #1 for Quality of Life (CNBC), while Massachusetts often leads overall livability/best state rankings (WalletHub), and Utah ranks high overall for Best States (U.S. News). These rankings vary by the specific metrics used, such as health, safety, environment, education, or economic opportunity. 

What is the safest state to live in?

The safest states to live in consistently rank high for low crime (violent and property), strong financial health, and good emergency preparedness, with Vermont, New Hampshire, and Maine frequently appearing at the top of 2025 lists from sources like WalletHub and World Population Review. Other top contenders often include Massachusetts, Utah, Idaho, and Connecticut, while factors like cybercrime rates and road safety also play a role in overall safety scores. 

What is the least toxic state to live in?

Forty-three states and Washington, DC, have a healthy average AQI. Hawaii's is the best (24.2), followed by Alaska (27.9), and Maine (34.8). Arizona is the only state with an unhealthy average AQI, at 101.8. Nationally, the average AQI was 48.6 in 2021.

What is the top 10 cleanest city?

Listed below are 10 of the world's cleanest cities, each paving the way toward a more sustainable future for our planet.

1. Copenhagen, Denmark. ...
2. Singapore. ...
3. Calgary, Canada. ...
4. Helsinki, Finland. ...
5. Wellington, New Zealand. ...
6. Zurich, Switzerland. ...
7. Oslo, Norway. ...
8. Dubai, United Arab Emirates.

What state has the best water?

There isn't one single state with the "best" water, as it depends on the metric (violations, taste, source), but Hawaii, Massachusetts, and Tennessee consistently rank high for drinking water quality based on few violations, while states like Washington, New Hampshire, and South Dakota are praised for strict standards or customer satisfaction, with some sources also highlighting strong performers like Minnesota and Nebraska. 

What is the #1 polluter on planet Earth?

There isn't one single #1 polluter, as it depends on the metric (country, company, sector), but China is the largest national polluter by total greenhouse gas emissions, while fossil fuel companies (like Saudi Aramco, Chevron, ExxonMobil) are top corporate polluters, and the energy sector (burning fossil fuels) is the biggest overall source for human-caused pollution, with the US military noted as a huge institutional emitter.
 

What is the no. 1 dirtiest country in the world?

While rankings vary by data source, Chad and Bangladesh consistently rank as the world's dirtiest or most air-polluted countries in recent reports (2024/2025), primarily due to extremely high PM2.5 levels from dust, burning, and industry, with Pakistan and the DRC often following closely. Different metrics exist, but Chad led in PM2.5 concentrations in 2024, while Bangladesh often tops other reports based on similar metrics or being a consistent leader.