SmogRank / United States / South Carolina / North Charleston
North Charleston, month by month
North Charleston has a measured daily mean on 1,303 days since 1 January 2023. Its worst month was June 2023, at 61 US AQI (14.2 µg/m³), 426th of 1,603 cities on that month's world ranking. Its cleanest was October 2025, at 30 US AQI (5.4 µg/m³). 2025 averaged 48 US AQI (8.6 µg/m³), against 42 US AQI (7.5 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
2 months
| Month | Why |
|---|---|
| Mar 2023 | 11 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive. |
| 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.
North Charleston's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| June 2023 | 6114.2 µg/m³ | 426thof 1,603 | Eastern United States and Canada, June and July 2023 Eastern United States and Canada, May and June 2023 |
| February 2025 | 5611.9 µg/m³ | 1,023rdof 2,633 | Georgia, South Carolina and Alabama, United States, February 2025 |
| July 2023 | 5511.2 µg/m³ | 508thof 1,432 | United States and Canada, July 2023 Eastern United States and Canada, June and July 2023 |
| March 2026 | 5410.8 µg/m³ | 1,464thof 2,971 | – |
| July 2026 | 5310.3 µg/m³ | 1,280thof 2,784 | – |
| May 2023 | 5310.2 µg/m³ | 441stof 1,600 | Eastern United States and Canada, May and June 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.
North Charleston's worst days
| Day | US AQI | Episode |
|---|---|---|
| 26 Feb 2025 | 10537.3 µg/m³ | Georgia, South Carolina and Alabama, United States, February 2025 |
| 10 Jun 2023 | 9432.2 µg/m³ | Eastern United States and Canada, May and June 2023 |
| 19 Jul 2023 | 9331.4 µg/m³ | United States and Canada, July 2023 |
| 9 Jun 2023 | 8728.2 µg/m³ | Eastern United States and Canada, May and June 2023 |
| 30 Jun 2023 | 8427.0 µg/m³ | Eastern United States and Canada, June and July 2023 |
| 22 Mar 2026 | 8426.8 µg/m³ | – |
| 27 Feb 2025 | 8225.8 µg/m³ | Georgia, South Carolina and Alabama, United States, February 2025 |
| 29 Jun 2023 | 8024.7 µg/m³ | Eastern United States and Canada, June and July 2023 |
| 28 Jun 2023 | 7722.9 µg/m³ | Eastern United States and Canada, June and July 2023 |
| 21 Mar 2026 | 7622.3 µg/m³ | – |
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, North Charleston, 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/north-charleston/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.
North Charleston now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 02:07 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).