When we think of air pollution, we often think of smoggy city skies or smoke from raging wildfires. But the real danger is what we can’t see—fine particulate matter, known as PM2.5. These microscopic particles, less than 2.5 micrometers in diameter, can penetrate deep into the lungs and even enter the bloodstream, affecting your heart and blood vessels.
A recent study in rural Montana found that both wildfire smoke and elevated household PM2.5 levels were linked to higher blood pressure (BP)—a known risk factor for heart disease and stroke. Even a 10 µg/m³ increase in indoor PM2.5 was enough to raise systolic blood pressure (SBP) by 1.34 mmHg. During wildfire-affected days, BP spiked even higher.
Why It Matters
High blood pressure is a major risk factor for heart attacks, strokes, and kidney disease. Millions of people around the world live in areas with poor air quality—whether due to traffic, industrial emissions, or seasonal wildfires. If you already have heart disease, asthma, or diabetes, exposure to PM2.5 could worsen your condition. But even healthy individuals are at risk over time.
What You Can Do
- Wear a high-quality mask (like N95 or KN95) during outdoor activities in polluted environments.
- Check your local Air Quality Index (AQI) using free apps or websites.
- Limit outdoor activities on high-pollution days, especially if you have heart conditions.
- Invest in an indoor air purifier, especially if you live near busy roads or in wildfire-prone regions.
- Support public policies aimed at reducing emissions and improving environmental health.