SmogRank / World / Germany / Lower Saxony / September 2025

Most polluted cities in Lower Saxony, Germany, September 2025

26 cities in Lower Saxony, Germany ranked by their average PM2.5 over the 30 days. Worst: Oldenburg at 6.3 µg/m³, #1,921 of 3,052 cities in the world. Cleanest: Braunlage at 3.4. A city needs measurements on 70% of the days to be ranked.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.

← Oldenburg 0% 0.75%0

Every city in Lower Saxony, Germany ranked for September 2025, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.

1Oldenburg
0%
2Ritterhude
0%
2Bösel
0%
4Osnabrück
0%
5Hildesheim
0%
5Emden
0%
7Lingen
0%
8Norderney
0%
9Rinteln
0%
10Walsrode
0%
10Lemwerder
0%
12Hannover
0%
12Göttingen
0%
14Wolfsburg
0%
14Braunschweig
0%
16Oyten
0%
17Wilhelmshaven
0%
17Otterndorf
0%
17Lüchow
0%
17Goslar
0%
21Lüneburg
0%
21Jork
0%
23Salzgitter
0%
24Uslar
0%
25Duderstadt
0%
26Braunlage
0%

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

All cities in the world, September 2025 · All cities in Germany, September 2025 · Lower Saxony now

Use this board

SmogRank, most polluted cities in Lower Saxony, Germany, PM2.5, September 2025, smogrank.com/de/region/lower-saxony/history/2025-09 (accessed 6 Oct 2026).

Download top 10 (PNG)

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.