SmogRank / Germany / Bavaria / Passau

Passau, month by month

Passau has a measured daily mean on 591 days since 11 January 2023. Its worst month was January 2024, at 68 US AQI (18.0 µg/m³), 336th of 2,385 cities on that month's world ranking. Its cleanest was November 2023, at 39 US AQI (7.1 µg/m³). 2024 averaged 55 US AQI (11.3 µg/m³), against 53 US AQI (10.4 µg/m³) in 2023.

Every month since 2023

2026too few days for a mean (a year needs 199)1 day measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOct1 day
2025too few days for a mean (a year needs 256)0 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
202455 for the year260 days measured445th of 2,097 in the world
Jan68#336Feb54#602Mar15 daysApr44#1,319May40#1,621Jun51#879Jul48#1,103Aug14 daysSepnoneOct12 daysNov62#399Dec56#689
202353 for the year330 days measured427th of 1,355 in the world
Jan7 daysFeb65#260Mar54#214Apr46#752May52#561Jun54#701Jul47#817Aug48#844Sep54#439Oct53#314Nov39#1,408Dec61#301
Each square is a month's mean PM2.5 in US AQI from Passau'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 Passau 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

27 months
MonthWhy
Oct 20261 of 11 days measured; a month needs 8. The others: 9 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours).
Sep 2026No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jun 2026No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 2026No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Mar 2026No day measured. The others: 31 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 2025No day measured. The others: 31 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 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Mar 2025No day measured. The others: 31 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.
Oct 202412 of 31 days measured; a month needs 22. The others: 19 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 202414 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks.
Mar 202415 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks.
Jan 20237 of 31 days measured; a month needs 22. The others: 14 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.

Passau's worst months

MonthUS AQIDays measuredWorld rankEpisode
January 2024 6818.0 µg/m³31 of 31336thof 2,385Europe, 27 January to 2 February 2024
Europe, 28 to 31 January 2024and 1 more
February 2023 6516.5 µg/m³27 of 28260thof 1,129Europe, 28 February to 4 March 2023
Europe, 6 to 25 February 2023
November 2024 6215.2 µg/m³24 of 30399thof 2,624Eastern Europe, 25 to 29 November 2024
Europe, November 2024
December 2023 6114.4 µg/m³31 of 31301stof 2,247Europe, December 2023
Eastern Europe, November and December 2023
December 2024 5611.8 µg/m³26 of 31689thof 2,616–
September 2023 5410.9 µg/m³30 of 30439thof 2,176–

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.

Passau's worst days

DayUS AQIEpisode
12 Jan 2024 14051.2 µg/m³Europe, 8 to 27 January 2024
11 Jan 2024 13850.5 µg/m³Europe, 8 to 27 January 2024
11 Feb 2023 12444.8 µg/m³Europe, 6 to 25 February 2023
12 Feb 2023 12143.8 µg/m³Europe, 6 to 25 February 2023
11 Sept 2023 10637.4 µg/m³–
10 Feb 2023 10537.2 µg/m³Europe, 6 to 25 February 2023
31 Jan 2024 10336.5 µg/m³Europe, 27 January to 2 February 2024
Europe, 28 to 31 January 2024
6 Dec 2023 10235.8 µg/m³Europe, December 2023
8 Nov 2024 9935.1 µg/m³Europe, November 2024
30 Jan 2024 9733.6 µg/m³Europe, 27 January to 2 February 2024
Europe, 28 to 31 January 2024

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, Passau, Germany, 11 Jan 2023 – 1 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/de/passau/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.

Passau 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).