SmogRank / United States / North Carolina / Greenville
Greenville, month by month
Greenville has a measured daily mean on 1,331 days since 1 January 2023. Its worst month was June 2023, at 62 US AQI (15.1 µg/m³), 379th of 1,603 cities on that month's world ranking. Its cleanest was October 2025, at 24 US AQI (4.3 µg/m³). 2025 averaged 35 US AQI (6.3 µg/m³), against 34 US AQI (6.2 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 |
|---|---|
| Oct 2026 | 2 of 11 days measured; a month needs 8. The others: 8 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours). |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Greenville's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| June 2023 | 6215.1 µg/m³ | 379thof 1,603 | Eastern United States and Canada, June and July 2023 United States and Canada, June 2023and 1 more |
| July 2023 | 5612.0 µg/m³ | 402ndof 1,432 | United States and Canada, July 2023 Eastern United States and Canada, June and July 2023 |
| August 2023 | 529.8 µg/m³ | 652ndof 1,980 | – |
| July 2026 | 529.8 µg/m³ | 1,413thof 2,784 | – |
| June 2026 | 498.9 µg/m³ | 842ndof 2,497 | – |
| June 2025 | 498.8 µg/m³ | 1,652ndof 2,508 | – |
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.
Greenville's worst days
| Day | US AQI | Episode |
|---|---|---|
| 18 Jul 2023 | 11942.9 µg/m³ | United States and Canada, July 2023 |
| 22 Apr 2023 | 11139.7 µg/m³ | – |
| 1 Jul 2023 | 9633.4 µg/m³ | Eastern United States and Canada, June and July 2023 |
| 7 Jun 2023 | 9130.5 µg/m³ | Eastern United States and Canada, May and June 2023 |
| 9 Jun 2023 | 8628.0 µg/m³ | Eastern United States and Canada, May and June 2023 |
| 29 Jun 2023 | 8627.8 µg/m³ | Eastern United States and Canada, June and July 2023 |
| 30 Jun 2023 | 8527.2 µg/m³ | Eastern United States and Canada, June and July 2023 |
| 10 Jun 2023 | 8527.1 µg/m³ | Eastern United States and Canada, May and June 2023 |
| 18 Jun 2023 | 8225.5 µg/m³ | United States and Canada, June 2023 |
| 29 Dec 2025 | 7622.6 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, Greenville, United States, 1 Jan 2023 – 2 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/greenville/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.
Greenville 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).