SmogRank / India / Punjab / Ludhiana
Ludhiana, month by month
Ludhiana has a measured daily mean on 505 days since 19 February 2025. Its worst month was November 2025, at 163 US AQI (73.3 µg/m³), 85th of 2,715 cities on that month's world ranking. Its cleanest was September 2025, at 88 US AQI (29.2 µg/m³).
Every month since 2025
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
Months without a mean, and why
5 months
| Month | Why |
|---|---|
| Oct 2026 | 6 of 12 days measured; a month needs 9. The others: 5 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours). |
| Sep 2026 | 14 of 30 days measured; a month needs 21. The others: 3 with readings for part of the day (a day needs 18 hours), 13 with under 18 hours of readings or readings that failed our checks. |
| Aug 2026 | 19 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks. |
| Jan 2026 | 20 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks. |
| Feb 2025 | 10 of 28 days measured; a month needs 20. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Ludhiana's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| November 2025 | 16373.3 µg/m³ | 85thof 2,715 | – |
| June 2025 | 16068.3 µg/m³ | 10thof 2,508 | – |
| December 2025 | 15763.6 µg/m³ | 131stof 3,006 | – |
| October 2025 | 15561.2 µg/m³ | 49thof 2,614 | India and Pakistan, October 2025 |
| April 2025 | 15257.5 µg/m³ | 22ndof 2,951 | North-western India, 6 to 8 April 2025 |
| February 2026 | 15055.3 µg/m³ | 82ndof 2,866 | – |
Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.
Ludhiana's worst days
| Day | US AQI | Episode |
|---|---|---|
| 7 Jul 2025 | 380265.0 µg/m³ | – |
| 28 Jun 2025 | 280205.0 µg/m³ | – |
| 8 Jul 2025 | 260185.0 µg/m³ | – |
| 21 Oct 2025 | 212137.0 µg/m³ | India and Pakistan, October 2025 |
| 22 Jun 2025 | 207132.0 µg/m³ | – |
| 5 Aug 2025 | 203128.0 µg/m³ | – |
| 22 Oct 2025 | 201126.0 µg/m³ | India and Pakistan, October 2025 |
| 26 Jun 2025 | 194117.0 µg/m³ | – |
| 12 Aug 2025 | 194117.0 µg/m³ | – |
| 9 Aug 2025 | 192114.0 µg/m³ | – |
Daily means, the highest since 19 Feb 2025; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.
Use this history
SmogRank, PM2.5 monthly and daily means, Ludhiana, India, 19 Feb 2025 – 7 Oct 2026. Monitor data from CPCB via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/in/ludhiana/history (accessed 12 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.
Ludhiana now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 22:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).