SmogRank / India / Maharashtra / Mumbai
Mumbai, month by month
Mumbai has a measured daily mean on 1,274 days since 1 January 2023. Its worst month was January 2023, at 183 US AQI (101.6 µg/m³), 9th of 1,261 cities on that month's world ranking. Its cleanest was July 2023, at 35 US AQI (6.3 µg/m³). 2025 averaged 109 US AQI (38.7 µg/m³), against 122 US AQI (43.9 µg/m³) in 2024.
Every month since 2023
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
3 months
| Month | Why |
|---|---|
| Jan 2026 | 21 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | 12 of 31 days measured; a month needs 22. The others: 19 missing from OpenAQ's archive. |
| Feb 2023 | 3 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Mumbai's worst months
| Month | US AQI | World rank |
|---|---|---|
| January 2023 | 183101.6 µg/m³ | 9thof 1,261 |
| January 2025 | 17894.0 µg/m³ | 12thof 2,474 |
| December 2024 | 17387.0 µg/m³ | 12thof 2,616 |
| December 2023 | 16981.2 µg/m³ | 15thof 2,247 |
| November 2024 | 16879.3 µg/m³ | 10thof 2,624 |
| January 2024 | 16777.9 µg/m³ | 12thof 2,385 |
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.
Mumbai's worst days
| Day | US AQI |
|---|---|
| 19 Jan 2023 | 263188.0 µg/m³ |
| 18 Jan 2023 | 249174.0 µg/m³ |
| 16 Feb 2024 | 239164.0 µg/m³ |
| 28 Dec 2023 | 221146.0 µg/m³ |
| 17 Feb 2024 | 220145.0 µg/m³ |
| 28 Dec 2024 | 215140.0 µg/m³ |
| 20 Jan 2023 | 214139.0 µg/m³ |
| 17 Jan 2023 | 212137.0 µg/m³ |
| 17 May 2024 | 209134.0 µg/m³ |
| 20 Jan 2025 | 208133.0 µg/m³ |
Daily means, the highest since 1 Jan 2023; 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, Mumbai, India, 1 Jan 2023 – 11 Oct 2026. Monitor data from CPCB and AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/in/mumbai/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.
Mumbai now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 21:07 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).