SmogRank / India / Maharashtra / Kalyān

Kalyān, month by month

Kalyān has a measured daily mean on 542 days since 19 February 2025. Its worst month was February 2026, at 157 US AQI (64.5 µg/m³), 46th of 2,866 cities on that month's world ranking. Its cleanest was July 2026, at 78 US AQI (23.4 µg/m³).

Every month since 2025

2026110 so far242 days measured84th of 2,793 in the world
Jan20 daysFeb157#46Mar129#101Apr123#95May85#199Jun84#174Jul78#247Aug97#80Sep97#95Oct6 days
2025120 for the year300 days measured54th of 2,681 in the world
JanFeb10 daysMar145#70Apr132#47May103#98Jun89#127Jul87#100Aug103#51Sep92#76Oct114#139Nov151#149Dec156#137
Each square is a month's mean PM2.5 in US AQI from Kalyān'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 Kalyān 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

3 months
MonthWhy
Oct 20266 of 12 days measured; a month needs 9. The others: 5 with no readings from the monitors, 1 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.

Kalyān's worst months

MonthUS AQIDays measuredWorld rank
February 2026 15764.5 µg/m³21 of 2846thof 2,866
December 2025 15662.3 µg/m³31 of 31137thof 3,006
November 2025 15156.0 µg/m³28 of 30149thof 2,715
March 2025 14553.4 µg/m³31 of 3170thof 2,862
April 2025 13248.0 µg/m³24 of 3047thof 2,951
March 2026 12946.8 µg/m³30 of 31101stof 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.

Kalyān's worst days

DayUS AQI
19 Feb 2025 250174.5 µg/m³
13 Feb 2026 242166.8 µg/m³
29 Apr 2025 233157.9 µg/m³
14 Feb 2026 217141.3 µg/m³
20 Feb 2025 206130.8 µg/m³
13 Jul 2025 195118.6 µg/m³
19 Aug 2025 183101.0 µg/m³
13 Aug 2025 18299.7 µg/m³
23 Nov 2025 17488.0 µg/m³
26 Aug 2026 17487.6 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, Kalyān, India, 19 Feb 2025 – 7 Oct 2026. Monitor data from CPCB via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/in/kalyan/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.

Kalyān 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).