SmogRank / United States / Arizona / Apache Junction
Apache Junction, month by month
Apache Junction has a measured daily mean on 1,279 days since 11 January 2023. Its worst month was July 2024, at 41 US AQI (7.4 µg/m³), 1,572nd of 2,566 cities on that month's world ranking. Its cleanest was September 2023, at 11 US AQI (2.0 µg/m³). 2025 averaged 29 US AQI (5.2 µg/m³), against 26 US AQI (4.7 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
3 months
| Month | Why |
|---|---|
| Aug 2026 | 19 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks. |
| Apr 2023 | 14 of 30 days measured; a month needs 21. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| Jan 2023 | 7 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Apache Junction's worst months
| Month | US AQI | World rank |
|---|---|---|
| July 2024 | 417.4 µg/m³ | 1,572ndof 2,566 |
| March 2026 | 417.3 µg/m³ | 2,292ndof 2,971 |
| August 2025 | 376.7 µg/m³ | 2,290thof 2,901 |
| July 2023 | 356.3 µg/m³ | 1,050thof 1,432 |
| July 2025 | 356.3 µg/m³ | 2,207thof 2,889 |
| December 2024 | 346.2 µg/m³ | 1,990thof 2,616 |
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.
Apache Junction's worst days
| Day | US AQI |
|---|---|
| 30 Mar 2026 | 10436.8 µg/m³ |
| 1 Jul 2025 | 9935.0 µg/m³ |
| 29 Mar 2026 | 7924.3 µg/m³ |
| 28 Mar 2026 | 7924.0 µg/m³ |
| 14 Jul 2024 | 7522.2 µg/m³ |
| 10 Aug 2025 | 7220.4 µg/m³ |
| 13 Aug 2025 | 6516.5 µg/m³ |
| 21 Jul 2023 | 6416.2 µg/m³ |
| 12 Jul 2024 | 6315.3 µg/m³ |
| 1 Oct 2023 | 6215.2 µg/m³ |
Daily means, the highest since 11 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, Apache Junction, United States, 11 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/apache-junction/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.
Apache Junction now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 17:07 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).