SmogRank / India / Tamil Nadu / Gummidipundi

Gummidipundi, month by month

Gummidipundi has a measured daily mean on 517 days since 19 February 2025. Its worst month was December 2025, at 211 US AQI (135.2 µg/m³), 30th of 3,006 cities on that month's world ranking. Its cleanest was May 2025, at 93 US AQI (31.7 µg/m³).

Every month since 2025

2026159 so far236 days measured16th of 2,793 in the world
Jan20 daysFeb180#17Mar157#40Apr133#80May141#58Jun138#48Jul153#22Aug154#7Sep16 daysOct6 days
2025157 for the year281 days measured18th of 2,681 in the world
JanFeb10 daysMar128#108Apr94#145May93#130Jun98#101Jul141#32Aug147#12Sep168#1Oct168#32Nov176#56Dec211#30
Each square is a month's mean PM2.5 in US AQI from Gummidipundi'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 Gummidipundi 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

4 months
MonthWhy
Oct 20266 of 12 days measured; a month needs 9. The others: 6 with no readings from the monitor.
Sep 202616 of 30 days measured; a month needs 21. The others: 12 with no readings from the monitor, 2 with readings for part of the day (a day needs 18 hours).
Jan 202620 of 31 days measured; a month needs 22. The others: 11 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.

Gummidipundi's worst months

MonthUS AQIDays measuredWorld rank
December 2025 211135.2 µg/m³27 of 3130thof 3,006
February 2026 18096.6 µg/m³21 of 2817thof 2,866
November 2025 17690.7 µg/m³26 of 3056thof 2,715
October 2025 16879.5 µg/m³30 of 3132ndof 2,614
September 2025 16879.2 µg/m³30 of 301stof 3,104
March 2026 15764.2 µg/m³30 of 3140thof 2,971

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.

Gummidipundi's worst days

DayUS AQI
28 Dec 2025 358254.0 µg/m³
20 Dec 2025 336243.0 µg/m³
5 Jan 2026 336243.0 µg/m³
6 Jan 2026 306228.0 µg/m³
31 Dec 2025 252177.0 µg/m³
30 Dec 2025 243168.0 µg/m³
3 Jan 2026 242167.0 µg/m³
24 Dec 2025 241166.0 µg/m³
2 Feb 2026 238163.0 µg/m³
21 Dec 2025 234159.0 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, Gummidipundi, India, 19 Feb 2025 – 7 Oct 2026. Monitor data from CPCB via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/in/gummidipundi/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.

Gummidipundi 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).