SmogRank / United States / Maryland / Oxon Hill-Glassmanor
Oxon Hill-Glassmanor, month by month
Oxon Hill-Glassmanor has a measured daily mean on 892 days since 2 April 2024. Its worst month was July 2026, at 61 US AQI (14.7 µg/m³), 540th of 2,784 cities on that month's world ranking. Its cleanest was September 2026, at 19 US AQI (3.5 µg/m³). 2025 averaged 36 US AQI (6.4 µg/m³), against 34 US AQI (6.1 µg/m³) in 2024.
Every month since 2024
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
Oxon Hill-Glassmanor's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| July 2026 | 6114.7 µg/m³ | 540thof 2,784 | Northern United States and Canada, July 2026 |
| July 2025 | 529.8 µg/m³ | 1,310thof 2,889 | North-eastern United States, July 2025 |
| June 2025 | 529.6 µg/m³ | 1,419thof 2,508 | – |
| August 2024 | 437.8 µg/m³ | 1,311thof 2,010 | – |
| February 2026 | 437.8 µg/m³ | 2,022ndof 2,866 | – |
| June 2024 | 437.7 µg/m³ | 1,431stof 2,563 | – |
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.
Oxon Hill-Glassmanor's worst days
| Day | US AQI | Episode |
|---|---|---|
| 17 Jul 2026 | 186106.0 µg/m³ | Northern United States and Canada, July 2026 |
| 18 Jul 2026 | 11842.4 µg/m³ | Northern United States and Canada, July 2026 |
| 5 Jul 2026 | 9532.9 µg/m³ | – |
| 5 Jul 2025 | 9532.7 µg/m³ | North-eastern United States, July 2025 |
| 4 Jul 2025 | 9030.2 µg/m³ | North-eastern United States, July 2025 |
| 2 Jul 2026 | 7421.7 µg/m³ | – |
| 5 Mar 2026 | 7321.0 µg/m³ | – |
| 14 Jun 2025 | 7220.4 µg/m³ | – |
| 3 Jul 2026 | 7119.8 µg/m³ | – |
| 6 Aug 2025 | 6918.7 µg/m³ | – |
Daily means, the highest since 2 Apr 2024; 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, Oxon Hill-Glassmanor, United States, 2 Apr 2024 – 10 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/oxon-hill-glassmanor/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.
Oxon Hill-Glassmanor now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 20:07 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).