SmogRank / World / Germany / Lower Saxony / January 2023

Most polluted cities in Lower Saxony, Germany, January 2023

No city in Lower Saxony, Germany had measurements on 70% of the days, so January 2023 has no board for Lower Saxony, Germany.

OpenAQ's archive, where our readings come from, has almost none for 7 of these 31 days. Cities in the United States and Europe have them from the EPA's and the European Environment Agency's own records of the same monitors; elsewhere a city's average is over its other days. Why.

Lower Saxony has 26 cities ranked over the last 30 days, but none here: most of its monitors have no readings for January 2023 in OpenAQ's archive, where ours come from, or too few to rank. Cities missing from this board weren't clean, just not measured.

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

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