SmogRank / United States / Louisiana / Schriever
Schriever, month by month
Schriever has a measured daily mean on 1,239 days since 1 January 2023. Its worst month was July 2023, at 66 US AQI (17.4 µg/m³), 100th of 1,432 cities on that month's world ranking. Its cleanest was May 2026, at 33 US AQI (6.0 µg/m³). 2025 averaged 48 US AQI (8.6 µg/m³), against 52 US AQI (9.5 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
3 months
| Month | Why |
|---|---|
| Feb 2026 | 16 of 28 days measured; a month needs 20. The others: 8 with no readings from the monitor, 4 with readings for part of the day (a day needs 18 hours). |
| 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.
Schriever's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| July 2023 | 6617.4 µg/m³ | 100thof 1,432 | – |
| June 2023 | 6416.1 µg/m³ | 354thof 1,603 | – |
| May 2023 | 5712.5 µg/m³ | 234thof 1,600 | Southern United States, May 2023 |
| June 2025 | 5712.4 µg/m³ | 739thof 2,508 | – |
| August 2024 | 5712.2 µg/m³ | 316thof 2,010 | – |
| May 2024 | 5511.4 µg/m³ | 539thof 2,684 | – |
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.
Schriever's worst days
| Day | US AQI | Episode |
|---|---|---|
| 19 Dec 2024 | 11541.1 µg/m³ | – |
| 4 Oct 2023 | 9029.9 µg/m³ | South-eastern United States, October 2023 |
| 18 Jul 2023 | 8929.7 µg/m³ | – |
| 22 May 2023 | 8828.7 µg/m³ | Southern United States, May 2023 |
| 27 Apr 2025 | 8627.9 µg/m³ | – |
| 17 May 2024 | 8527.6 µg/m³ | – |
| 21 Jun 2025 | 8527.6 µg/m³ | – |
| 12 Jul 2023 | 8426.7 µg/m³ | – |
| 15 Jul 2023 | 8125.3 µg/m³ | – |
| 16 Jul 2023 | 8125.2 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, Schriever, 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/schriever/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.
Schriever now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 18:07 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).