Nepal's national asthma prevalence sits at roughly 7.5 to 8.9 %, a figure that, in isolation, tells us surprisingly little. Behind it lies a starkly uneven distribution across the country's seven provinces, shaped by altitude, industrialisation, farming practices, and the quality of the air that millions of Nepalis breathe every day.

The latest data from the Nepal Health Research Council (NHRC) and the Global Burden of Disease (GBD) reports, covering 2024 to 2026, gives us the most granular provincial picture yet. At NHAFN, we believe this data must move beyond infographics and into community action — and that begins with understanding what the numbers actually mean.

 

  • 11.7–12.5%: Bagmati Province - highest asthma prevalence, driven by urban air pollution
  • 4.2–5.8%: Gandaki Province - lowest recorded prevalence, linked to better hilly air quality
  • 7.5–8.9%: National average - masking wide disparities across all seven provinces

 

Bagmati leads - and not in a good way

At 11.7 to 12.5 percent, Bagmati Province records the highest asthma prevalence in the country. The drivers here are well-documented: PM2.5 particles from vehicle emissions, persistent construction dust across Kathmandu Valley, and the seasonal brick kiln smoke that blankets the basin every dry season. Urban growth without corresponding environmental regulation has created a respiratory emergency hiding in plain sight.

 Kathmandu Valley's air quality regularly breaches WHO safe thresholds. For the nearly four million people living in Bagmati Province's urban core, each breath carries a measurable cost.

 

The tarai's particular burden

Madhesh Province at 10.2 percent and Lumbini at 9.8 percent both exceed the national average, but for reasons distinct from Bagmati's urban pollution story. In Madhesh, high humidity, pollen loads, and agricultural dust create a chronic trigger environment with agricultural workers facing disproportionately elevated risk. In Lumbini, rapid industrialisation and pesticide exposure across the farming plains are driving numbers upward in ways that public health infrastructure has struggled to track, let alone address.

 

Karnali: lower prevalence, higher danger

Karnali Province presents a case that statistics alone can obscure. At 7.5 percent, its prevalence sits near the national average but the data comes with a critical qualifier. Extreme cold at high altitudes means that asthma episodes in Karnali are more likely to be severe, more likely to require emergency care, and more likely to occur far from any functional health facility. Prevalence and burden are not the same thing, and in Karnali, the gap between them is life-threatening.

 

Sudurpaschim and the biomass problem

At 8.4 percent, Sudurpaschim sits just above the national average. Its trigger environment is shaped by seasonal biomass burning, a practice tied directly to energy poverty and the absence of clean cooking alternatives for large segments of its rural population. Addressing asthma in Sudurpaschim is inseparable from addressing energy access. This is the kind of systemic entanglement that narrowly clinical public health interventions consistently fail to reach.

 

Gandaki's relative advantage and its limits

Gandaki Province's comparatively low prevalence of 4.2 to 5.8 percent is largely attributed to better air quality in its hilly terrain outside major city centres. But this advantage is not guaranteed to last. Urban development, tourism-related traffic growth, and the expansion of Pokhara's industrial footprint are all forces that, without deliberate environmental policy, could erode Gandaki's respiratory health edge within a generation.

 

From data to action

Nepal's asthma data is not simply a health story, it is an environmental justice story, an energy story, an agricultural policy story, and an urban planning story told through the lungs of its people. Each provincial prevalence figure points to a set of upstream causes that community health programming must engage if it is to move beyond symptom management.

Through Project Swastha Saans Nepal, NHAFN is deploying volunteer facilitators across all seven provinces to bring respiratory health education directly to communities. But we know that education alone is not enough. We continue to advocate for clean air policy, biomass fuel alternatives, and occupational health protections for Nepal's agricultural and industrial workers because the right to breathe clearly should not depend on which province you were born in.

Source: Nepal Health Research Council (NHRC) and the Global Burden of Disease (GBD) reports, 2024–2026. Infographic produced by NHAFN.