SmogRank / India / Andhra Pradesh / Chittoor

Chittoor, month by month

Chittoor has a measured daily mean on 289 days since 15 March 2025. Its worst month was September 2026, at 117 US AQI (42.2 µg/m³), 43rd of 2,981 cities on that month's world ranking. Its cleanest was June 2026, at 111 US AQI (39.6 µg/m³).

Every month since 2025

2026too few days for a mean (a year needs 200)181 days measured
Jan18 daysFeb13 daysMar15 daysApr15 daysMay18 daysJun111#91Jul112#64Aug21 daysSep117#43Oct5 days
2025too few days for a mean (a year needs 256)108 days measured
JanFebMar1 dayApr3 daysMay1 dayJunnoneJul15 daysAug19 daysSep17 daysOct19 daysNov16 daysDec17 days
Each square is a month's mean PM2.5 in US AQI from Chittoor'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 Chittoor 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

17 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).
Aug 202621 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
May 202618 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks.
Apr 202615 of 30 days measured; a month needs 21. The others: 15 with under 18 hours of readings or readings that failed our checks.
Mar 202615 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks.
Feb 202613 of 28 days measured; a month needs 20. The others: 15 with under 18 hours of readings or readings that failed our checks.
Jan 202618 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks.
Dec 202517 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks.
Nov 202516 of 30 days measured; a month needs 21. The others: 14 with under 18 hours of readings or readings that failed our checks.
Oct 202519 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Sep 202517 of 30 days measured; a month needs 21. The others: 13 with under 18 hours of readings or readings that failed our checks.
Aug 202519 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Jul 202515 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks.
Jun 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 20251 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Apr 20253 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
Mar 20251 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks.

A day counts once 18 hours of it are measured; a month needs 70% of its days.

Chittoor's worst months

MonthUS AQIDays measuredWorld rank
September 2026 11742.2 µg/m³23 of 3043rdof 2,981
July 2026 11239.8 µg/m³26 of 3164thof 2,784
June 2026 11139.6 µg/m³27 of 3091stof 2,497

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.

Chittoor's worst days

DayUS AQIEpisode
1 Jan 2026 266191.0 µg/m³–
16 Dec 2025 253178.0 µg/m³–
31 Dec 2025 194117.0 µg/m³–
12 Oct 2025 192114.0 µg/m³Southern India, 12 to 14 October 2025
28 Dec 2025 184102.0 µg/m³–
8 Oct 2025 18096.8 µg/m³Southern India, 7 to 8 October 2025
13 Oct 2025 17792.7 µg/m³Southern India, 12 to 14 October 2025
27 Dec 2025 17792.3 µg/m³–
7 Dec 2025 17488.9 µg/m³–
6 Dec 2025 17183.6 µg/m³–

Daily means, the highest since 15 Mar 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, Chittoor, India, 15 Mar 2025 – 7 Oct 2026. Monitor data from CPCB via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/in/chittoor/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.

Chittoor 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).