SmogRank / India / Tamil Nadu / Ramanathapuram

Ramanathapuram, month by month

Ramanathapuram has a measured daily mean on 225 days since 19 February 2025. Its worst month was May 2025, at 119 US AQI (42.7 µg/m³), 63rd of 3,125 cities on that month's world ranking. Its cleanest was July 2025, at 83 US AQI (26.5 µg/m³).

Every month since 2025

2026too few days for a mean (a year needs 201)0 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnone
2025too few days for a mean (a year needs 256)225 days measured
JanFeb10 daysMar84#377Apr90#167May119#63Jun93#106Jul83#115Aug93#68Sep93#68Oct91#194Nov11 daysDecnone
Each square is a month's mean PM2.5 in US AQI from Ramanathapuram'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 Ramanathapuram marked; each year, the year's.
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

13 months
MonthWhy
Oct 2026No day measured.
Sep 2026No day measured.
Aug 2026No day measured.
Jul 2026No day measured.
Jun 2026No day measured.
May 2026No day measured.
Apr 2026No day measured.
Mar 2026No day measured.
Feb 2026No day measured.
Jan 2026No day measured.
Dec 2025No day measured. The others: 31 with no readings from the monitor.
Nov 202511 of 30 days measured; a month needs 21. The others: 11 with no readings from the monitor, 8 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.

Ramanathapuram's worst months

MonthUS AQIDays measuredWorld rankEpisode
May 2025 11942.7 µg/m³23 of 3163rdof 3,125–
June 2025 9331.8 µg/m³23 of 30106thof 3,112–
September 2025 9331.6 µg/m³27 of 3068thof 3,245–
August 2025 9331.4 µg/m³27 of 3168thof 3,095Tamil Nadu and Karnataka, India, August 2025
October 2025 9130.4 µg/m³26 of 31194thof 3,010Southern India, 12 to 14 October 2025
April 2025 9029.8 µg/m³23 of 30167thof 3,145–

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.

Ramanathapuram's worst days

DayUS AQI
14 May 2025 256181.0 µg/m³
12 Jun 2025 206131.0 µg/m³
9 Aug 2025 16778.0 µg/m³
20 Mar 2025 16373.2 µg/m³
29 May 2025 16373.2 µg/m³
3 Sept 2025 16271.2 µg/m³
28 Apr 2025 16068.9 µg/m³
9 Nov 2025 16067.8 µg/m³
15 Oct 2025 15967.1 µg/m³
17 Apr 2025 15763.8 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, Ramanathapuram, India, 19 Feb 2025 – 13 Oct 2026. Monitor data from CPCB via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/in/ramanathapuram/history (accessed 14 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.

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

Updated 2026-10-14 03:07 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).