SmogRank / United States / South Carolina / Saint Andrews
Saint Andrews, month by month
Saint Andrews has a measured daily mean on 1,321 days since 22 January 2023. Its worst month was June 2023, at 61 US AQI (14.7 µg/m³), 395th of 1,603 cities on that month's world ranking. Its cleanest was October 2025, at 26 US AQI (4.7 µg/m³). 2025 averaged 43 US AQI (7.8 µg/m³), against 49 US AQI (8.8 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 |
|---|---|
| Jan 2023 | 1 of 31 days measured; a month needs 22. The others: 9 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.
Saint Andrews's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| June 2023 | 6114.7 µg/m³ | 395thof 1,603 | Eastern United States and Canada, June and July 2023 United States and Canada, June 2023and 1 more |
| July 2023 | 5812.6 µg/m³ | 328thof 1,432 | United States and Canada, July 2023 Eastern United States and Canada, June and July 2023 |
| March 2024 | 5511.1 µg/m³ | 292ndof 1,698 | Georgia, Alabama and South Carolina, United States, March 2024 Eastern United States, March 2024 |
| June 2024 | 5410.6 µg/m³ | 528thof 2,563 | – |
| August 2023 | 5410.5 µg/m³ | 534thof 1,980 | – |
| July 2026 | 5310.4 µg/m³ | 1,259thof 2,784 | – |
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.
Saint Andrews's worst days
| Day | US AQI | Episode |
|---|---|---|
| 14 Mar 2024 | 14553.3 µg/m³ | Eastern United States, March 2024 |
| 1 Mar 2023 | 12243.9 µg/m³ | – |
| 18 Jul 2023 | 10838.2 µg/m³ | United States and Canada, July 2023 |
| 13 Mar 2024 | 9432.2 µg/m³ | Eastern United States, March 2024 |
| 21 Mar 2026 | 9030.0 µg/m³ | South-eastern United States, March 2026 |
| 22 Feb 2024 | 9029.8 µg/m³ | South-eastern United States, February 2024 |
| 18 Jun 2023 | 8829.2 µg/m³ | United States and Canada, June 2023 |
| 1 Jul 2023 | 8628.0 µg/m³ | Eastern United States and Canada, June and July 2023 |
| 9 Jun 2023 | 8627.8 µg/m³ | Eastern United States and Canada, May and June 2023 |
| 30 Jun 2023 | 8627.7 µg/m³ | Eastern United States and Canada, June and July 2023 |
Daily means, the highest since 22 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, Saint Andrews, United States, 22 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/saint-andrews/history (accessed 13 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.
Saint Andrews now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 00:07 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).