U.S. Cities Facing the Toughest Indoor Air Pollution Challenges

By Gideon Rubin, CEO, YourIAQ and Sensables

Indoor air pollution is a complex issue, influenced by both outdoor air and conditions inside buildings. While outdoor air quality in a region can be a concern, individual indoor spaces can take measures to purify their air. Indoor air quality is affected by unique elements like mold, pet dander, and cooking fumes, which aren’t typically concerns outdoors.

However, outdoor pollutants often seep into our homes and offices, affecting the quality of indoor air we breathe. While it’s challenging to pinpoint indoor air quality for every space nationwide, it’s feasible to identify regions with conditions that likely lead to poor indoor air quality.

A recent study by YourIAQ analyzed the largest 100 metropolitan statistical areas (MSAs) based on the 2020 U.S. Census data to identify cities with the worst indoor air pollution. The study considered factors such as particulate matter, humidity, forest fires, vehicle exhaust, pollen, and industrial pollution. Additionally, growth rates and development practices were evaluated to gauge the overall pollution probability.

The findings revealed that cities with rapid growth and abundant sunshine, especially in the south and southwest, are more prone to air pollution. Here’s a rundown of the top 10 U.S. cities grappling with indoor air pollution:

Cape Coral, Florida

Along with Fort Meyers and Naples, the Cape Coral metro area faces high humidity, an uncomfortable allergy season, and heavy congestion, all factors that contribute to pollution.  

Orlando, Florida

Orlando has a few air quality challenges of its own. Humidity, industrial pollution, high pollen counts, and wildfires are all factors that influence local indoor air quality.

Dallas, Texas

Dallas is known for several issues that create a risk of air quality issues, including heavy traffic and industrial pollution. 

Stockton, California

Large amounts of particulate matter, car exhaust, and a dangerous wildfire season are among the contributors to Stockton’s air pollution levels. 

Bakersfield, California

Forest fires, traffic pollution, and mountains that frequently trap contaminants are some of the issues residents of Bakersfield have to deal with to manager their indoor air. 

Tulsa, Oklahoma 

Oklahoma’s second largest city faces challenges due to a severe pollen season and high amounts of local pollution.

Phoenix, Arizona

A very serious risk of wildfires and heavy vehicle emissions mean Phoenix’s indoor air quality can be a concern.

McAllen, Texas

With high humidity and significant levels of particulate matter, indoor air management is crucial in the border region around McAllen.

Oklahoma City, Oklahoma

A harsh allergy season combined with local pollution puts Oklahoma City on the list. Increased wildfires in recent years increases the threat.

Houston, Texas

Leading the chart, Houston grapples with smog, traffic congestion, and rapid urban growth, making its indoor air quality a significant potential problem for locals.

While outdoor air quality plays a role, it’s essential for residents in these cities to be proactive in managing and improving their indoor air quality. One of the best ways to do this is to invest in an indoor air quality monitor that provides data on exactly which pollutants are in the air. The more you know, the better equipped you can be to act on it.