SmogRank / India / Puducherry / Puducherry

Puducherry, month by month

Puducherry has a measured daily mean on 460 days since 19 February 2025. Its worst month was December 2025, at 151 US AQI (56.0 µg/m³), 170th of 3,006 cities on that month's world ranking. Its cleanest was April 2026, at 55 US AQI (11.5 µg/m³).

Every month since 2025

202671 so far231 days measured357th of 2,793 in the world
Jan21 daysFeb105#173Mar77#491Apr55#762May67#343Jun58#424Jul58#775Aug58#507Sep65#328Oct5 days
2025too few days for a mean (a year needs 256)229 days measured
JanFeb10 daysMar78#451Apr66#485May13 daysJun61#513Jul60#521Aug62#355SepnoneOct21 daysNov110#217Dec151#170
Each square is a month's mean PM2.5 in US AQI from Puducherry'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 Puducherry marked; each year, the year's.
Good0–50
Moderate51–100
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

6 months
MonthWhy
Oct 20265 of 12 days measured; a month needs 9. The others: 5 with no readings from the monitor, 2 with readings for part of the day (a day needs 18 hours).
Jan 202621 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Oct 202521 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Sep 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 202513 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks.
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.

Puducherry's worst months

MonthUS AQIDays measuredWorld rankEpisode
December 2025 15156.0 µg/m³31 of 31170thof 3,006–
November 2025 11039.2 µg/m³23 of 30217thof 2,715Southern India, November 2025
February 2026 10537.2 µg/m³21 of 28173rdof 2,866–
March 2025 7823.6 µg/m³26 of 31451stof 2,862–
March 2026 7723.2 µg/m³30 of 31491stof 2,971–
May 2026 6717.5 µg/m³24 of 31343rdof 2,874–

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.

Puducherry's worst days

DayUS AQI
31 Dec 2025 17894.1 µg/m³
30 Dec 2025 17792.7 µg/m³
21 Dec 2025 17285.5 µg/m³
11 Dec 2025 17183.5 µg/m³
20 Dec 2025 17082.9 µg/m³
29 Dec 2025 16778.7 µg/m³
19 Dec 2025 16574.8 µg/m³
12 Dec 2025 16474.2 µg/m³
2 Feb 2026 16372.1 µg/m³
10 Dec 2025 16271.4 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, Puducherry, India, 19 Feb 2025 – 6 Oct 2026. Monitor data from CPCB via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/in/puducherry/history (accessed 12 Oct 2026).

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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.

Puducherry 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).