SmogRank / Italy / Campania / Polla

Polla, month by month

Polla has a measured daily mean on 153 days since 21 October 2025. Its worst month was August 2026, at 57 US AQI (12.1 µg/m³), 555th of 2,896 cities on that month's world ranking. Its cleanest was May 2026, at 32 US AQI (5.7 µg/m³).

Every month since 2025

2026too few days for a mean (a year needs 199)149 days measured
Jan3 daysFebnoneMar2 daysApr20 daysMay32#2,069Jun18 daysJul51#1,542Aug57#555Sep17 daysOct56#423
2025too few days for a mean (a year needs 256)4 days measured
JanFebMarAprMayJunJulAugSepOct4 daysNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Polla'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 Polla marked; each year, the year's. A dashed square is the running month, so far.
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

9 months
MonthWhy
Sep 202617 of 30 days measured; a month needs 21. The others: 13 with readings for part of the day (a day needs 18 hours).
Jun 202618 of 30 days measured; a month needs 21. The others: 12 with readings for part of the day (a day needs 18 hours).
Apr 202620 of 30 days measured; a month needs 21. The others: 2 with no readings from the monitor, 8 with readings for part of the day (a day needs 18 hours).
Mar 20262 of 31 days measured; a month needs 22. The others: 29 with readings for part of the day (a day needs 18 hours).
Feb 2026No day measured. The others: 3 with no readings from the monitor, 25 with readings for part of the day (a day needs 18 hours).
Jan 20263 of 31 days measured; a month needs 22. The others: 28 with readings for part of the day (a day needs 18 hours).
Dec 2025No day measured. The others: 1 with no readings from the monitor, 30 with readings for part of the day (a day needs 18 hours).
Nov 2025No day measured. The others: 30 with readings for part of the day (a day needs 18 hours).
Oct 20254 of 31 days measured; a month needs 22. The others: 7 with readings for part of the day (a day needs 18 hours).

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

Polla's worst months

MonthUS AQIDays measuredWorld rank
August 2026 5712.1 µg/m³30 of 31555thof 2,896
July 2026 519.3 µg/m³29 of 311,542ndof 2,784
May 2026 325.7 µg/m³22 of 312,069thof 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.

Polla's worst days

DayUS AQI
6 Oct 2026 8728.3 µg/m³
29 Aug 2026 8326.1 µg/m³
28 Aug 2026 7723.2 µg/m³
8 Sept 2026 7220.6 µg/m³
13 Apr 2026 7119.8 µg/m³
30 Aug 2026 7019.1 µg/m³
21 Jul 2026 6918.8 µg/m³
7 Oct 2026 6818.0 µg/m³
23 Jan 2026 6617.0 µg/m³
31 Aug 2026 6516.4 µg/m³

Daily means, the highest since 21 Oct 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, Polla, Italy, 21 Oct 2025 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/it/polla/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.

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

Updated 2026-10-12 17:07 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).