List Shows What States Have The Most (And Least) Pollution — And Why It Matters (2024)

Over the years, numerous studies have shown that pollution hurts kids and adults in dangerous and insidious ways. And when it comes to air pollution, even though the United States has some of the cleanest air of industrialized nations, even that pretty clean air is not clean enough — because air pollution is a major killer in the United States, associated with 100,000 to 200,000 deaths each year. Water pollution, too, can be incredibly harmful for kids’ health and development. And that harm is not felt equally, according to a new report that shows that some states have far, far more polluted air and water than others.

As part of U.S. News and World Report data from 2021 used to compile its “Best States” list, the publication also looked at air and water pollution levels and ranked states on whether they had clean or dirty water and air.

“Pollution was determined based on air and water emissions from industry and utilities,” The Hill explained in a write-up of the report. The data also investigated the “overall measures to long-term human health effects, using information from the Environmental Protection Agency.”

From there, the states were ranked in order of pollution and air quality levels from best to worst.

States with the lowest pollution levels:

  1. Vermont
  2. New Hampshire
  3. South Dakota
  4. New Mexico
  5. Wyoming
  6. California
  7. Rhode Island
  8. Maine
  9. Colorado
  10. Idaho

States with the highest pollution levels:

  1. Nevada
  2. Indiana
  3. Delaware
  4. Utah
  5. Ohio
  6. Oregon
  7. Tennessee
  8. Illinois
  9. Alabama
  10. Texas

Why should parents care about the pollution levels of their state?

A recent study from Boston College on air quality in Massachusetts — a state ranked 17th best on this US News list — found that air quality in particular is a massive issue in the country, impacting both adults and kids. However, the impact on children has long-lasting consequences. The researchers found that consistent air pollution exposure was linked to babies being born with low birth weight, more kids being diagnosed with asthma, and an average drop of two IQ points in children.

Unfortunately, the health impact kids experience due to pollution isn’t felt equally by all kids across the country. Low-income and marginalized communities are exposed to more air pollution than wealthy families.

What’s worse is that all of these negative health effects happen below the EPA’s air pollution standard.

“All of these adverse health effects occur at fine particulate matter pollution levels below the U.S. Environmental Protection Agency (EPA)’s current annual standard of 12 micrograms per cubic meter,” said lead author Philip J. Landrigan, M.D., a Boston College Professor of Biology. “So even for a state like Massachusetts, which registered below that standard, air pollution is a formidable public health threat that needs urgently to be addressed.” “Clearly, current EPA air pollution standards are not adequately protecting public health,” Landrigan said.

The amount of pollution in Massachusetts falls comfortably into the category in which children are at significant risk of long-lasting health impacts, according to the World Health Organization.

In terms of water pollutants, children “don’t need as much toxicant” to be harmed, environmental health researcher Abby Mutic told Fatherly. In the United States, well water isn’t subject to federal regulations, and about 20% of Americans get their water from wells. Water contaminants can harm the health of children by, for example, causing lead poisoning and increasing the risk of conditions such as cancer.

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List Shows What States Have The Most (And Least) Pollution — And Why It Matters (2024)

FAQs

List Shows What States Have The Most (And Least) Pollution — And Why It Matters? ›

The ten states with the best air quality are Hawaii, Maine, Alaska, Virginia, Vermont, New Hampshire, Florida, New York, Washington, and Louisiana.

What states have the least pollution? ›

The ten states with the best air quality are Hawaii, Maine, Alaska, Virginia, Vermont, New Hampshire, Florida, New York, Washington, and Louisiana.

Which US states have the most pollution? ›

1. California

California is the most polluted state in the US. Six of the most polluted cities are located in California, with Fresno-Madera and Bakersfield being the two areas with the highest levels of particulate pollution. The worst ozone levels can be found in Los Angeles.

What states are the biggest polluters? ›

Texas, Ohio, Florida, Indiana, and Pennsylvania emitted the most CO2 pollution from power plants. Texas power plants emitted nearly twice the amount of CO2 emitted by power plants in Ohio and Florida, the next highest polluting states.

Which US state has the most negative impact on the environment? ›

Key findings: New Mexico and Oklahoma have the most air and water pollution, while Hawaii and North Dakota have the lowest pollution levels. Air quality is the worst in California, followed by New Mexico and Arizona. In 2022, California had a total of 67% “good” air quality days, while Hawaii had 99%.

Where is the least pollution? ›

Australia topped the list as the least polluted country in the world, with 6 cities in the top 25. Of the 25 least polluted cities in the world with the best air quality, Nordic countries (Finland, Sweden, Norway, Iceland) dominated the rankings with some of the cleanest air in the world in 2024.

What is the cleanest US state? ›

Vermont
  • #1 Low Industrial Toxins.
  • #1 Low Pollution Health Risk.

Where is the cleanest air in the USA? ›

Cleanest Cities | State of the Air
Albany-Schenectady, NYalbany-schenectady-ny.html1
Urban Honolulu, HIurban-honolulu-hi.html1
Victoria-Port Lavaca, TXvictoria-port-lavaca-tx.html1
Waco, TXwaco-tx.html1
Waterloo-Cedar Falls, IAwaterloo-cedar-falls-ia.html1
70 more rows

Who has the worst air quality in the United States? ›

Los Angeles air pollution. Los Angeles has the most contaminated air in the country.

Which US city has the worst pollution? ›

Bakersfield is the most polluted city in the U.S. by year-round air quality, according to the ALA. It is the third city in California's Central Valley to make the list, joining the Fresno and Visalia areas. Bakersfield also ranks first for high-pollution days and third for most polluted cities by ozone exposure.

What US cities have the best air quality? ›

Over 90% of cities had good air quality on most days in 2021. Map of metro areas colored by % good air quality days. The give best are Honolulu, Hawaii (99.7%), Kahului-Wailuku-Lahaina, HI(99.7%), Lake Havasu City-Kingman, AZ (99.2%), Longview, WA (98.6%), Olympia, WA (98.5%).

Which states will survive climate change? ›

Best states for climate change
  • Minnesota. While it might be known for its cold winters, Minnesota is well-equipped to handle climate change. ...
  • Illinois. Like Minnesota, Illinois benefits from its regional placement. ...
  • Rhode Island. ...
  • Maine. ...
  • Wyoming. ...
  • California. ...
  • Florida. ...
  • Utah.
Jul 15, 2022

What is the least environmentally friendly state in the United States? ›

North Dakota

Of all 50 states, the Sioux State is the least sustainable state of all. It is 7th on the list for most water usage, third for most energy usage and 50th for solar friendliness.

Where will be the safest place to live in 2050? ›

In examining a progressively worsening climate, Scenario 8.5, the safest counties in 2050 become:
  • McKinley County, New Mexico.
  • Conejos County, Colorado.
  • Summit County, Colorado.
  • duch*esne County, Utah.
  • Saguache County, Colorado.
  • Spokane County, Washington.
  • Emery County, Utah.
  • Eagle County, Colorado.
Mar 23, 2023

Where in the U.S. is the cleanest air? ›

Cleanest Cities | State of the Air
Albany-Schenectady, NYalbany-schenectady-ny.html1
Urban Honolulu, HIurban-honolulu-hi.html1
Victoria-Port Lavaca, TXvictoria-port-lavaca-tx.html1
Waco, TXwaco-tx.html1
Waterloo-Cedar Falls, IAwaterloo-cedar-falls-ia.html1
70 more rows

What state has the least polluted water? ›

  • Hawaii. #1 in Air & Water Quality. #34 in Best States Overall. ...
  • Virginia. #2 in Air & Water Quality. ...
  • Massachusetts. #3 in Air & Water Quality. ...
  • Minnesota. #4 in Air & Water Quality. ...
  • South Carolina. #5 in Air & Water Quality. ...
  • Florida. #6 in Air & Water Quality. ...
  • North Dakota. #7 in Air & Water Quality. ...
  • Nebraska. #8 in Air & Water Quality.

Which U.S. city has the worst pollution? ›

Bakersfield is the most polluted city in the U.S. by year-round air quality, according to the ALA. It is the third city in California's Central Valley to make the list, joining the Fresno and Visalia areas. Bakersfield also ranks first for high-pollution days and third for most polluted cities by ozone exposure.

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