Particles Plus News & Education

Thiès, Senegal – July, 2024 – A recent study conducted in Thiès, Senegal, utilizing Particles Plus technology, has shed light on the alarming levels of air pollution within minibuses, a vital mode of transportation for many African citizens.

The research, which employed the state-of-the-art Particle Plus 8301-AQM2 handheld air quality monitor, identified three primary sources of in-cabin pollutants:

  • Outdoor Air: Africa’s rapid urbanization and influx of older vehicles contribute to high levels of outdoor air pollution, particularly in congested cities.
  • Vehicle Emissions: The study highlights exhaust fumes, tire degradation, and overall vehicle condition as significant sources of pollutants within minibuses.
  • Occupancy: The number of passengers directly impacts CO2 concentration, raising concerns about ventilation and potential health risks.

Key Findings:

  • Fine particle concentrations soared from 25 μg/m3 to 300 μg/m3, exceeding recommended safety limits and varying based on location and time of day.
  • CO2 levels ranged from 400 ppm to 900 ppm, fluctuating with passenger numbers.
  • Temperatures within minibuses reached highs of 40°C, and relative humidity ranged between 40% and 70%.
  • Average speeds were found to be low at approximately 2.5 m/s, further contributing to pollutant build-up.
  • While opening doors and windows helps reduce CO2, it also increases exposure to dust particles.

Particles Plus Calls for Action:

Particles Plus urges policymakers, transportation authorities, and public health officials to address this critical issue.

  • Implementing stricter vehicle emission regulations and promoting cleaner fuel options.
  • Investing in improved road infrastructure and traffic management systems to reduce congestion.
  • Encouraging the adoption of modern, fuel-efficient minibuses.
  • Exploring air filtration and ventilation solutions specifically designed for minibuses.

Particles Plus Commitment to Clean Air:

Particles Plus remains dedicated to providing innovative solutions for air quality monitoring and data analysis. We believe clean air is a fundamental right, and we are committed to supporting initiatives that promote healthy and sustainable transportation across Africa and beyond.

For more information on Particles Plus and its range of advanced air quality monitoring products, visit or contact our team at +1-781-341-6898.