SmogRank / India / Chandigarh / Chandigarh

Chandigarh, month by month

Chandigarh has a measured daily mean on 551 days since 19 February 2025. Its worst month was December 2025, at 180 US AQI (96.8 µg/m³), 58th of 3,198 cities on that month's world ranking. Its cleanest was August 2026, at 64 US AQI (16.2 µg/m³).

Every month since 2025

202692 so far256 days measured182nd of 3,214 in the world
Jan21 daysFeb150#85Mar115#140Apr92#219May86#195Jun79#210Jul72#326Aug64#354Sep67#313Oct90#179
2025126 for the year295 days measured46th of 2,926 in the world
JanFeb10 daysMar122#117Apr126#55May115#69Jun119#61Jul75#167Aug69#222Sep82#129Oct139#77Nov160#103Dec180#58
Each square is a month's mean PM2.5 in US AQI from Chandigarh's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Chandigarh marked; each year, the year's. A dashed square is the running month, so far.
Good0–50
Moderate51–100
Unhealthy for sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

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

2 months
MonthWhy
Jan 202621 of 31 days measured; a month needs 22. The others: 9 with no readings from the monitors, 1 with readings for part of the day (a day needs 18 hours).
Feb 202510 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.

Chandigarh's worst months

MonthUS AQIDays measuredWorld rankEpisode
December 2025 18096.8 µg/m³31 of 3158thof 3,198–
November 2025 16067.9 µg/m³27 of 30103rdof 2,935–
February 2026 15055.2 µg/m³21 of 2885thof 3,180–
October 2025 13951.1 µg/m³30 of 3177thof 3,010India and Pakistan, October 2025
April 2025 12645.7 µg/m³24 of 3055thof 3,145–
March 2025 12244.1 µg/m³31 of 31117thof 3,102North-western India, 26 to 28 March 2025

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.

Chandigarh's worst days

DayUS AQI
17 Dec 2025 220145.0 µg/m³
29 Dec 2025 214138.5 µg/m³
30 Dec 2025 213138.0 µg/m³
31 Dec 2025 205129.5 µg/m³
20 Dec 2025 203127.5 µg/m³
26 Dec 2025 199123.5 µg/m³
12 Dec 2025 198123.0 µg/m³
18 Dec 2025 197121.0 µg/m³
2 Nov 2025 193114.8 µg/m³
1 Jan 2026 192113.5 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, Chandigarh, India, 19 Feb 2025 – 12 Oct 2026. Monitor data from CPCB via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/in/chandigarh/history (accessed 14 Oct 2026).

Download chart (PNG)

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.

Chandigarh now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-14 04:07 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).