When we think about school safety, we often focus on security measures, emergency drills, or food quality. However, one of the biggest threats to children’s health in schools is something invisible: indoor air pollution. Classroom air quality can significantly impact students’ respiratory health, concentration, and overall well-being.

With children spending up to eight hours daily in school buildings, ensuring clean air should be a priority. The good news? Advances in indoor air pollution solutions provide practical ways to monitor and improve school air quality, reducing the risk of respiratory illnesses caused by airborne pollutants.

How indoor air pollution affects student health

It’s no secret that childhood respiratory illnesses have been on the rise. According to the EPA (Environmental Protection Agency), 50% of U.S. schools have issues related to poor indoor air quality, and studies have linked these conditions to increased rates of asthma, allergies, and absenteeism.

One primary concern is particulate matter (PM2.5 and PM10), tiny airborne particles that can penetrate deep into the lungs and trigger respiratory diseases. Additionally, volatile organic compounds (VOCs) emitted from furniture, cleaning products, and school supplies contribute to headaches, dizziness, and long-term health risks.

Another overlooked factor is CO₂ buildup in classrooms. When ventilation is poor, CO₂ levels rise, leading to fatigue, poor concentration, and decreased cognitive performance among students. This directly affects their ability to focus and retain information, turning poor air quality into an academic and health concern.

Where is the pollution coming from?

Understanding the sources of indoor air pollution in schools is the first step in addressing the problem. Here are some common culprits:

  • Old HVAC Systems: Many school buildings, especially older ones, have outdated ventilation systems failing to circulate fresh air properly.
  • Traffic and Industrial Emissions: Schools near highways or factories often deal with higher air pollutants entering classrooms.
  • Mold and Humidity Issues: Poor maintenance can lead to mold growth, which releases airborne spores that aggravate respiratory conditions.
  • Cleaning Chemicals and School Supplies: Many classroom materials, from whiteboard markers to adhesives, release VOCs into the air.
  • Outdoor Pollutants Seeping Indoors: Construction sites, pollen, and wildfire smoke can all contribute to declining indoor air quality.

Indoor Air Pollution Solutions for Schools

The good news is that schools don’t have to accept poor air quality as the norm. Several indoor air pollution solutions can dramatically improve the environment for students and teachers.

Real-time air quality monitoring

Installing air quality monitoring systems in schools allows for real-time tracking of pollution levels. These devices detect harmful pollutants like PM2.5, CO₂, VOCs, and humidity levels, helping administrators identify problem areas and take immediate action. Schools can use this data to improve ventilation, schedule maintenance, or adjust daily activities when pollution levels spike.

Upgrading ventilation systems

Many schools rely on outdated ventilation, allowing pollutants to build up indoors. Upgrading to HVAC systems with HEPA filters can significantly reduce particulate matter and allergens in the air. Ensuring that ventilation systems meet ASHRAE (American Society of Heating, Refrigerating, and Air-Conditioning Engineers) standards can improve airflow and remove indoor contaminants more efficiently.

Air purification with HEPA filters

HEPA air purifiers can make a massive difference for classrooms in high-risk areas (near highways, industrial zones, or construction sites). These filters are designed to capture 99.97% of airborne pollutants, including dust, mold spores, and bacteria, creating a safer environment for children with asthma or allergies.

Greener cleaning practices

Switching to low-VOC and non-toxic cleaning products can help reduce chemical exposure in classrooms. Schools should also implement policies that limit using harsh disinfectants when students are present. Encouraging natural ventilation after cleaning can further prevent VOC buildup.

Controlling humidity to prevent mold

Maintaining indoor humidity levels between 30-50% is essential for preventing mold growth. Schools should inspect for leaks, improve drainage systems, and ensure proper air circulation to avoid damp conditions that encourage mold and mildew.

Why schools must take action now

Ignoring indoor air pollution in schools comes at a high cost. Studies show that poor air quality is directly linked to higher absenteeism rates due to respiratory illnesses. The CDC (Centers for Disease Control and Prevention) reports that one in thirteen U.S. children suffers from asthma, and exposure to airborne pollutants significantly worsens their condition.

Beyond health concerns, air quality also affects academic performance. A Harvard study found that improving classroom ventilation and air filtration boosts cognitive function by 61%, making a strong case for better school air quality management.

 

Conclusion

Children deserve to breathe clean air while they learn—it’s that simple. Implementing indoor air pollution solutions isn’t just a precaution; it’s an investment in the next generation’s health, safety, and success.

By combining air quality monitoring, improved ventilation, and proactive policies, schools can reduce pollution-related illnesses, enhance student performance, and create a healthier learning environment for years. It’s time for educators, parents, and policymakers to work together in prioritizing cleaner air for students—because their future depends on it.