# Loni Is Now the World’s Most Polluted City — And Delhi, Noida & Ghaziabad Aren’t Far Behind

URL: https://technosports.co.in/loni-is-now-the-worlds-most-polluted/  
Published: 2026-03-27  
Updated: 2026-03-27  
Author: Reetam Bodhak

Forget what you thought you knew about India’s air pollution map. While Delhi has long hogged the headlines, it’s a lesser-known city in Uttar Pradesh that has quietly become the **most toxic place on the planet** to breathe.

## India’s Most Polluted Cities — IQAir 2025 Report

| Rank (Global) | City | PM2.5 (µg/m³) | Times Above WHO Limit |
| --- | --- | --- | --- |
| **#1** | Loni, UP | **112.5** | 22x |
| **#3** | Byrnihat, Meghalaya | 101.1 | 20x |
| **#4** | Delhi | 99.6 | 19x |
| **#7** | Ghaziabad | 89.2 | 17x |
| **#18** | Noida | 80.5 | 16x |
| **#21** | Greater Noida | 77.2 | 15x |

*Source: [IQAir World Air Quality Report 2025](https://www.iqair.com/world-air-quality-report)*

## Loni: The Name You Should Know

Loni, a city in Ghaziabad district bordering Delhi, recorded an annual average PM2.5 concentration of 112.5 µg/m³ in 2025 — more than 22 times the WHO permissible guideline — making it the world’s most polluted city. [Wikipedia](https://en.wikipedia.org/wiki/Mindiyum_Paranjum)

![Loni](https://technosports.co.in/wp-content/uploads/2026/03/lonisdoo-1024x675.avif)

What drove this? Extreme pollution events in March, April, and December pushed Loni’s annual average up nearly 23% compared to 2024. [Wikipedia](https://en.wikipedia.org/wiki/Mindiyum_Paranjum) Add industrial clusters, brick kilns, vehicular overflow from Delhi, and geographic “bowl effect” trapping pollutants — and you have a slow-burning crisis.

> 🔗 **Also Read:** [Top Gadgets & Air Purifiers to Beat India’s Toxic Air — Technosports](https://www.technosports.co.in)

## Delhi Still the World’s Most Polluted Capital

Among capital cities globally, New Delhi ranked as the most polluted capital in 2025, with an annual average PM2.5 concentration of 82.2 µg/m³. [Wikipedia](https://en.wikipedia.org/wiki/Mindiyum_Paranjum) That’s a city of 33 million people breathing air that is nearly 16x beyond safe limits — every single day.

Vehicular emissions, industrial output, crop residue burning, and construction dust remained the dominant sources of PM2.5 pollution across India. [Wikipedia](https://en.wikipedia.org/wiki/Mindiyum_Paranjum)

## India’s Bigger Picture

Five of the ten most polluted cities globally are Indian — Loni, Byrnihat, Delhi, Ghaziabad, and Ula — and all 25 of the world’s most polluted cities are located in India, Pakistan, and China. [Telugu Library](https://telugulibrary.in/unni-mukundan-modi-biopic-maa-vande-2026/)

Despite this, India’s national average PM2.5 dropped slightly from 50.6 µg/m³ in 2024 to 48.9 µg/m³ in 2025 — though scientists caution this is likely due to weather patterns, not permanent improvement. [Wikipedia](https://en.wikipedia.org/wiki/Mindiyum_Paranjum)

> 🔗 **Read More:** [EV Adoption in India: Can Electric Vehicles Fix Our Air? — Technosports](https://www.technosports.co.in)

For deeper context on particulate matter and its health impact, visit the [Wikipedia article on PM2.5](https://en.wikipedia.org/wiki/Particulates).

## FAQs

### **Q1. Which is India’s most polluted city in 2025?**

 Loni in Ghaziabad, Uttar Pradesh — with PM2.5 at 112.5 µg/m³, it surpassed Delhi to become both India’s and the world’s most polluted city.

### **Q2. Is Delhi still the most polluted capital city in the world?**

Yes. Despite Loni topping the overall city rankings, New Delhi retained its title as the world’s most polluted capital city in 2025 with an average PM2.5 of 82.2 µg/m³.