SmogRank / United States / California / Long Beach
Long Beach, month by month
Long Beach has a measured daily mean on 1,321 days since 1 January 2023. Its worst month was December 2024, at 69 US AQI (19.0 µg/m³), 300th of 2,616 cities on that month's world ranking. Its cleanest was March 2024, at 28 US AQI (5.0 µg/m³). 2025 averaged 54 US AQI (10.5 µg/m³), against 51 US AQI (9.3 µg/m³) in 2024.
Every month since 2023
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
Long Beach's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| December 2024 | 6919.0 µg/m³ | 300thof 2,616 | South-western United States and Mexico, December 2024 to January 2025 California and Oregon, United States, December 2024 |
| December 2025 | 6617.3 µg/m³ | 628thof 3,006 | Western United States and Mexico, December 2025 |
| January 2025 | 6617.1 µg/m³ | 395thof 2,474 | South-western United States and Mexico, December 2024 to January 2025 |
| November 2025 | 5813.0 µg/m³ | 684thof 2,715 | – |
| September 2023 | 5812.7 µg/m³ | 278thof 2,176 | California and Oregon, United States, September 2023 |
| July 2023 | 5712.1 µg/m³ | 391stof 1,432 | California, United States, July 2023 |
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.
Long Beach's worst days
| Day | US AQI | Episode |
|---|---|---|
| 1 Jan 2025 | 12243.9 µg/m³ | South-western United States and Mexico, December 2024 to January 2025 |
| 17 Dec 2025 | 12143.6 µg/m³ | Western United States and Mexico, December 2025 |
| 31 Dec 2024 | 11641.5 µg/m³ | South-western United States and Mexico, December 2024 to January 2025 |
| 13 Dec 2025 | 11139.6 µg/m³ | Western United States and Mexico, December 2025 |
| 9 Jan 2025 | 10336.2 µg/m³ | – |
| 5 Dec 2024 | 9633.2 µg/m³ | California and Oregon, United States, December 2024 |
| 25 Dec 2023 | 9231.1 µg/m³ | Western United States and Mexico, December 2023 |
| 10 Jan 2025 | 9030.1 µg/m³ | – |
| 2 Jan 2025 | 9029.8 µg/m³ | South-western United States and Mexico, December 2024 to January 2025 |
| 18 Dec 2025 | 8929.6 µg/m³ | Western United States and Mexico, December 2025 |
Daily means, the highest since 1 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, Long Beach, United States, 1 Jan 2023 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/long-beach/history (accessed 12 Oct 2026).
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.
Long Beach now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 19:07 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).