SmogRank / United States / Michigan / Redford
Redford, month by month
Redford has a measured daily mean on 1,285 days since 1 January 2023. Its worst month was June 2023, at 85 US AQI (27.3 µg/m³), 136th of 1,603 cities on that month's world ranking. Its cleanest was September 2026, at 26 US AQI (4.7 µg/m³). 2025 averaged 56 US AQI (11.6 µg/m³), against 55 US AQI (11.2 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
Months without a mean, and why
1 month
| Month | Why |
|---|---|
| Feb 2023 | 3 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Redford's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| June 2023 | 8527.3 µg/m³ | 136thof 1,603 | Eastern United States and Canada, June and July 2023 United States and Canada, June 2023and 1 more |
| July 2026 | 8024.5 µg/m³ | 226thof 2,784 | Northern United States and Canada, July 2026 North-eastern United States, June and July 2026 |
| February 2026 | 6918.7 µg/m³ | 608thof 2,866 | North-eastern United States and Canada, 14 to 19 February 2026 North-eastern United States and Canada, 2 to 3 February 2026 |
| June 2025 | 6616.9 µg/m³ | 315thof 2,508 | Northern United States and Canada, May and June 2025 |
| December 2025 | 6315.3 µg/m³ | 714thof 3,006 | – |
| January 2023 | 6214.8 µg/m³ | 252ndof 1,261 | Northern United States, January 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.
Redford's worst days
| Day | US AQI | Episode |
|---|---|---|
| 16 Jul 2026 | 299224.0 µg/m³ | Northern United States and Canada, July 2026 |
| 17 Jul 2026 | 235160.0 µg/m³ | Northern United States and Canada, July 2026 |
| 28 Jun 2023 | 193116.0 µg/m³ | Eastern United States and Canada, June and July 2023 |
| 5 Jul 2024 | 189109.0 µg/m³ | North-eastern United States and Canada, July 2024 |
| 29 Jun 2023 | 17387.3 µg/m³ | Eastern United States and Canada, June and July 2023 |
| 27 Jun 2023 | 16372.5 µg/m³ | Eastern United States and Canada, June and July 2023 |
| 6 Jun 2025 | 13951.0 µg/m³ | Northern United States and Canada, May and June 2025 |
| 4 Aug 2025 | 12846.4 µg/m³ | North-eastern United States and Canada, 29 July to 9 August 2025 |
| 5 Jul 2023 | 12645.6 µg/m³ | North-eastern United States, 4 to 5 July 2023 |
| 5 Jul 2025 | 12545.2 µg/m³ | North-eastern United States, July 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, Redford, 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/redford/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.
Redford now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 22:07 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).