PM2.5 stands for particulate matter 2.5 microns or smaller. These particles are 30 times thinner than a human hair and come from car exhaust, power plants, wildfires, and burning fuel. They are small enough to bypass your body's natural defenses and enter your bloodstream.

How does air pollution affect the body?

Air pollution affects virtually every organ in the body. PM2.5 particles enter your lungs, pass into your bloodstream, and travel to your heart, brain, kidneys, liver, and other organs. This causes chronic inflammation, increasing risks of heart disease, stroke, lung cancer, dementia, and many other conditions.

How many people are affected by air pollution?

99% of the global population breathes air that exceeds WHO safety guidelines. Air pollution kills approximately 8 million people every year—more than AIDS, malaria, and tuberculosis combined.

Nepal's Gandaki Air Pollution Report

Overview

Air Pollution in Gandaki

Gandaki faces significant air pollution challenges. 100% of districts exceed the WHO guideline for clean air. This is putting 2.8 million across 11 districts at risk.

The average PM2.5 over 2023 was 30.3µg/m³. That's 6.1 times the WHO guideline for clean air of 5µg/m³.

This is equivalent of everybody, including children, smoking about 503 cigarettes in a year.

Trends

Air Quality Trend

Annual PM2.5 levels from 2014 to 2023. The WHO guideline for safe air is 5 µg/m³.

Health Impact

Life Expectancy Impact

If Gandaki met the WHO guideline of 5 µg/m³, the average person would live 2.49 years longer.

That's 7.0M years of life stolen from 2.8 million people. Years of watching children grow up. Years of building a career. Years of quiet mornings and celebrations.

Lives cut short. Breathing kills.

Most Polluted

Districts with Highest Pollution

The top 10 most polluted districts in Gandaki. These areas face the greatest health burden from air pollution.

1.Nawalparasi East
3.7 years lost
2.Tanahu
2.5 years lost
3.Gorkha
2.4 years lost
4.Kaski
2.4 years lost
5.Lamjung
2.3 years lost
6.Syangja
2.3 years lost
7.Parbat
2.2 years lost
8.Myagdi
2.1 years lost
9.Baglung
2 years lost
10.Manang
1.9 years lost

Exposure

Population Exposure by Pollution Level

Distribution of population across different PM2.5 pollution levels. The WHO guideline is 5 µg/m³—only populations below this threshold are breathing safe air.

< 5 µg/m³

5-10 µg/m³

10-15 µg/m³

15-25 µg/m³

0.7%

21K

25-35 µg/m³

86.2%

2.4M

> 35 µg/m³

13.1%

366K

Districts

All 11 Districts in Gandaki

Complete air quality data for every district in Gandaki, sorted by population.

District	Population	PM2.5 µg/m³	Years Lost
Kaski	566K	29.0	2.4 years
Tanahu	377K	30.6	2.5 years
Nawalparasi East	366K	42.5	3.7 years
Syangja	339K	28.1	2.3 years
Gorkha	318K	29.8	2.4 years
Baglung	314K	25.5	2.0 years
Lamjung	194K	28.5	2.3 years
Parbat	171K	27.6	2.2 years
Myagdi	131K	26.9	2.1 years
Mustang	14K	23.4	1.8 years
Manang	7K	24.1	1.9 years

Showing 11 districts, sorted by population (largest first). PM2.5 values are for 2023. Years lost calculated against WHO guideline of 5 µg/m³.

Breathing in Gandaki is Injurious to Health.