Study finds pollution reaching remote Munsyari in the Himalaya
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An ARIES (DST) study measuring non-methane hydrocarbons at Munsyari, Uttarakhand, through 2022 to 2023 finds that even remote Himalayan air carries pollution that can form ozone and secondary aerosols. Levels were lower in winter and the monsoon and higher in spring and autumn. Dominant sources: LPG and diesel use, vehicles and local construction. Long-term benzene exposure exceeds cancer safety limits.
- Release
- 17 Jun 2026, Ministry of Science and Technology
- Site
- Munsyari, high-altitude Himalayan tourist town, Uttarakhand
- Period
- 2022 to 2023
- Institute
- Aryabhatta Research Institute of Observational Sciences (ARIES), DST
- Pollutants
- non-methane hydrocarbons (NMHCs), incl. benzene and xylene
- Pattern
- lower in winter/monsoon; higher in spring/autumn
NMHC pollution study at Munsyari: what happened?
Munsyari feels far from Delhi’s smog. Yet NMHCs from cooking fuel, diesel and building work still show up — and benzene’s long-term risk does not need a city skyline.
- NMHC levels higher than at Nainital but lower than Haldwani and Delhi.
- Immediate health risks described as low; long-term benzene cancer risk above safety limits.
- Study urges continuous monitoring and targeted cleanup in sensitive regions.
Why track NMHCs?
- They help form ozone and secondary aerosols that affect climate and health in the troposphere.
Why does NMHC pollution study at Munsyari matter?
- Environment: Remote Himalaya not pollution-free.
- Health: Benzene long-term risk flag.
What can Prelims ask on NMHC pollution study at Munsyari?
- Munsyari NMHC study (ARIES, 2022 to 2023).
- Sources: LPG/diesel, vehicles, construction; spring/autumn peaks.
How to use this in Mains
- As per PIB (2026-06-17): A study at Munsyari (Uttarakhand) found that even remote Himalayan air shows measurable pollution from non-methane hydrocarbons (NMHCs) that form ozone and secondary aerosols.
- The Himalaya faces risks to both health and its ice.
Quotable data pointA study at Munsyari (Uttarakhand) found that even remote Himalayan air shows measurable pollution from non-methane hydrocarbons (NMHCs) that form ozone and secondary aerosols.
PIB: DST: Himalayan air study, 17 Jun 2026
Exam angle
Prelims: NMHCs and ozone formation.
Practice MCQs
Original practice questions (not PYQs).
The Himalayan NMHC air study reported in June 2026 was conducted at
Answer (b) & explanation
PIB (DST), 17 Jun 2026.
Questions students ask about this
Where was the study done?
Munsyari, a high-altitude site in Uttarakhand.
What pollutants were measured?
Non-methane hydrocarbons (NMHCs), including aromatic compounds such as benzene and xylene.
When were concentrations highest?
Spring and autumn, versus lower levels in winter and the monsoon.
Keep studying
Go deeper
Official source: PIB: DST: Himalayan air study, 17 Jun 2026
facts from cited sources only; faculty review pending