SmogRank / Italy / Campania / Salerno

Salerno, month by month

Salerno has a measured daily mean on 606 days since 11 January 2023. Its worst month was February 2023, at 61 US AQI (14.7 µg/m³), 368th of 1,129 cities on that month's world ranking. Its cleanest was November 2023, at 39 US AQI (7.0 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 199)160 days measured
JannoneFebnoneMar1 dayApr51#1,137May42#1,480Jun20 daysJul54#1,237Aug57#516Sep49#828Oct56#412
2025too few days for a mean (a year needs 256)12 days measured
JannoneFebnoneMar2 daysApr6 daysMaynoneJunnoneJulnoneAugnoneSepnoneOct4 daysNovnoneDecnone
2024too few days for a mean (a year needs 257)140 days measured
Jan54#804Feb58#419Mar10 daysApr56#710May54#642Jun13 daysJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
202354 for the year294 days measured393rd of 1,355 in the world
Jan7 daysFeb61#368Mar46#450Apr42#928May43#996Jun52#883Jul19 daysAug21 daysSep60#227Oct57#176Nov39#1,448Dec58#366
Each square is a month's mean PM2.5 in US AQI from Salerno'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 Salerno 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

27 months
MonthWhy
Jun 202620 of 30 days measured; a month needs 21. The others: 10 with under 18 hours of readings or readings that failed our checks.
Mar 20261 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Feb 2026No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks.
Jan 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Dec 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 20254 of 31 days measured; a month needs 22. The others: 27 with under 18 hours of readings or readings that failed our checks.
Sep 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2025No day measured. The others: 31 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 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 20256 of 30 days measured; a month needs 21. The others: 24 with under 18 hours of readings or readings that failed our checks.
Mar 20252 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks.
Feb 2025No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks.
Jan 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Dec 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Sep 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jun 202413 of 30 days measured; a month needs 21. The others: 17 with under 18 hours of readings or readings that failed our checks.
Mar 202410 of 31 days measured; a month needs 22. The others: 21 with under 18 hours of readings or readings that failed our checks.
Aug 202321 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Jul 202319 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Jan 20237 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 13 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.

Salerno's worst months

MonthUS AQIDays measuredWorld rankEpisode
February 2023 6114.7 µg/m³25 of 28368thof 1,129Europe, 6 to 25 February 2023
September 2023 6013.7 µg/m³25 of 30227thof 2,176–
December 2023 5812.9 µg/m³28 of 31366thof 2,247Eastern Europe, December 2023
February 2024 5812.8 µg/m³29 of 29419thof 2,486Europe, 27 January to 2 February 2024
August 2026 5712.5 µg/m³30 of 31516thof 2,896–
October 2023 5712.3 µg/m³30 of 31176thof 2,012–

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.

Salerno's worst days

DayUS AQIEpisode
1 Apr 2024 14653.7 µg/m³–
31 Mar 2024 9934.6 µg/m³–
19 May 2024 9230.9 µg/m³The Marches, Campania and Trentino-Alto Adige, Italy, May 2024
23 Feb 2023 9130.5 µg/m³Europe, 6 to 25 February 2023
19 Dec 2023 8627.7 µg/m³Eastern Europe, December 2023
25 Jul 2023 8527.1 µg/m³–
1 Feb 2024 8426.7 µg/m³Europe, 27 January to 2 February 2024
20 May 2024 8426.7 µg/m³The Marches, Campania and Trentino-Alto Adige, Italy, May 2024
31 Jan 2024 8426.6 µg/m³Europe, 27 January to 2 February 2024
20 Dec 2023 8326.4 µg/m³Eastern Europe, December 2023

Daily means, the highest since 11 Jan 2023; 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, Salerno, Italy, 11 Jan 2023 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/it/salerno/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.

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

Updated 2026-10-12 18:07 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).