SmogRank / United States / Nevada / Summerlin South
Summerlin South, month by month
Summerlin South has a measured daily mean on 1,365 days since 1 January 2023. Its worst month was September 2024, at 51 US AQI (9.3 µg/m³), 542nd of 2,010 cities on that month's world ranking. Its cleanest was March 2023, at 14 US AQI (2.5 µg/m³). 2025 averaged 27 US AQI (4.8 µg/m³), against 27 US AQI (4.9 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
Summerlin South's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| September 2024 | 519.3 µg/m³ | 542ndof 2,010 | Nevada and Utah, United States, September 2024 |
| August 2025 | 478.5 µg/m³ | 1,639thof 2,901 | – |
| July 2024 | 468.3 µg/m³ | 1,233rdof 2,566 | – |
| July 2025 | 366.4 µg/m³ | 2,170thof 2,889 | – |
| August 2024 | 346.2 µg/m³ | 1,708thof 2,010 | – |
| June 2025 | 346.1 µg/m³ | 2,158thof 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.
Summerlin South's worst days
| Day | US AQI | Episode |
|---|---|---|
| 11 Sept 2024 | 9834.3 µg/m³ | Nevada and Utah, United States, September 2024 |
| 27 Jul 2024 | 9532.7 µg/m³ | – |
| 12 Sept 2024 | 8125.3 µg/m³ | – |
| 16 Jun 2024 | 7923.9 µg/m³ | – |
| 6 Sept 2024 | 7421.7 µg/m³ | – |
| 5 Aug 2025 | 7421.3 µg/m³ | – |
| 4 Aug 2025 | 7220.5 µg/m³ | – |
| 5 Sept 2024 | 7220.4 µg/m³ | – |
| 26 Jul 2024 | 7019.3 µg/m³ | – |
| 21 Feb 2023 | 6918.9 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, Summerlin South, 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/summerlin-south/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.
Summerlin South now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 20:07 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).