Fact Check: The average American spends about 90% of their time indoors.

Fact Check: The average American spends about 90% of their time indoors.

Published July 1, 2025
by TruthOrFake AI
VERDICT
True

# Fact Check: "The average American spends about 90% of their time indoors." ## What We Know The claim that the average American spends about 90% of ...

Fact Check: "The average American spends about 90% of their time indoors."

What We Know

The claim that the average American spends about 90% of their time indoors is supported by multiple authoritative sources. The U.S. Environmental Protection Agency (EPA) estimates that Americans are indoors approximately 90% of their time, which includes environments such as homes, schools, workplaces, and other built environments (NIEHS, EPA). This statistic aligns with findings from various studies and reports, indicating a consistent trend in indoor living patterns among Americans (Lung Association).

Analysis

The claim is substantiated by credible sources, primarily the EPA and the National Institute of Environmental Health Sciences (NIEHS), both of which are reputable organizations that focus on public health and environmental issues. The EPA's data is derived from extensive research on indoor air quality, which highlights that indoor environments can significantly impact health due to the time spent within them.

While some discussions suggest that the exact percentage may vary slightly—one source noted that Americans spend about 86.9% of their time indoors, plus an additional 5.5% in vehicles (BuildingGreen)—the general consensus remains that the figure is around 90%. This slight variation does not detract from the overall validity of the claim, as it effectively captures the essence of indoor living trends.

Moreover, the sources cited are reliable and well-regarded in their fields. The EPA is a federal agency tasked with protecting human health and the environment, while the NIEHS is part of the National Institutes of Health, focusing on environmental health research. Their findings are based on rigorous studies and data collection, making them trustworthy references for this claim.

Conclusion

Verdict: True
The assertion that the average American spends about 90% of their time indoors is accurate, supported by data from credible sources such as the EPA and NIEHS. This statistic reflects a significant trend in modern living conditions, emphasizing the importance of indoor air quality and its implications for public health.

Sources

  1. Indoor Air Quality
  2. Improving Your Indoor Environment | US EPA
  3. Spending Time in Nature Boosts Mental Health
  4. Indoor Air Quality (IAQ) | US EPA
  5. Lung Association Launches Healthy and Efficient Homes
  6. We Spend 90% of Our Time Indoors. Says Who?

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