Nandgaon's Air Is 'Unhealthy': What the Numbers Mean and Why It Matters

Nandgaon is a small historical town in Mathura district, in the northern Indian state of Uttar Pradesh. With a population of roughly 16,500 people, it sits about 50 kilometres from Mathura and 8 kilometres from Barsana, in a region known as Braj — one of Hinduism's most sacred landscapes. The town is best known for its annual Lathmar Holi festival, when thousands of pilgrims gather to celebrate. But beyond its religious fame, Nandgaon is now drawing attention for a less welcome reason: the air its residents breathe every day is classified as unhealthy.

The data comes from IQAir, a Swiss air-technology company that runs a global platform called AirVisual. IQAir gathers readings from government monitoring stations, community sensors, and satellite data, and presents them using the US AQI scale — a standardised scoring system that translates pollution levels into a single number so ordinary people can quickly understand how safe or dangerous the air is on any given day. Nandgaon's current reading is 152 US AQI, which places it in the 'Unhealthy' category, meaning the general public — not just vulnerable groups — may start to suffer adverse health effects.

The main culprit behind this score is a pollutant called PM2.5. This refers to tiny airborne particles that are 2.5 micrometres or smaller in diameter — so small they cannot be seen by the naked eye and can travel deep into the lungs and even enter the bloodstream. Nandgaon's PM2.5 concentration is currently 57.2 micrograms per cubic metre of air. To understand how serious this is, consider that the World Health Organization — the United Nations agency responsible for global public health — recommends an annual average PM2.5 level of no more than 5 micrograms per cubic metre. Nandgaon's reading is 11.4 times that safe limit.

Nandgaon is not an exception in India — it is closer to the norm. India's average PM2.5 concentration in 2025 stands at 48.9 micrograms per cubic metre, nearly 9.78 times the WHO guideline. According to IQAir's 2024 World Air Quality Report, 13 of the world's 20 most polluted cities are in India. Uttar Pradesh, the state where Nandgaon sits, is among the worst-affected, with pollution fed by a combination of vehicle exhaust, crop-residue burning in neighbouring farms, construction dust, industrial emissions, and the burning of biomass — wood, dung cakes, and agricultural waste — for cooking and heating in homes.

The geography of the Gangetic Plain, the vast lowland stretching across northern India, makes things worse in winter. Between October and January, cold and still air sits close to the ground, trapping pollutants and preventing them from dispersing. This is why PM2.5 levels in towns like Nandgaon spike sharply in these months. During the monsoon — roughly July to September — heavy rains wash pollutants out of the air, providing temporary relief.

The Indian government has introduced several policies to tackle this crisis. The National Clean Air Programme, or NCAP, was launched in 2019 by the Ministry of Environment, Forest and Climate Change. It aims to reduce PM2.5 and PM10 — another category of slightly larger fine particles — by 40% in 131 cities that consistently fail to meet air quality standards; these are called non-attainment cities. A second mechanism, the Graded Response Action Plan, or GRAP, is an emergency framework that kicks in at specific AQI thresholds, triggering restrictions such as traffic curbs, bans on construction activity, and school closures. GRAP currently applies mainly to the Delhi-NCR region rather than smaller towns like Nandgaon.

For people living in Nandgaon right now, IQAir recommends practical steps to reduce exposure: limiting time spent outdoors, keeping windows and doors shut, wearing N95 or FFP2 masks — respirator masks that filter out fine particles — when stepping outside, and using air purifiers indoors. These are short-term coping measures, not solutions. Long-term improvement will depend on how effectively the NCAP is implemented, whether state authorities enforce pollution rules more strictly, and whether the practice of agricultural stubble burning — where farmers in Punjab and Haryana set fire to leftover crop stalks after harvest — is brought under control, since the smoke drifts across hundreds of kilometres into the Gangetic Plain.

The situation in Nandgaon illustrates a challenge that millions of Indians face silently every day. Unlike a flood or an earthquake, air pollution is invisible and slow-moving, making it easy to overlook. But its health toll — respiratory disease, cardiovascular illness, and premature death — is enormous and well-documented. Addressing it will require sustained political will, community awareness, and coordinated action across several states and sectors.