SmogRank / United States / Nebraska / Grand Island

Grand Island, month by month

Grand Island has a measured daily mean on 878 days since 1 January 2023. Its worst month was September 2023, at 61 US AQI (14.2 µg/m³), 205th of 2,176 cities on that month's world ranking. Its cleanest was December 2025, at 18 US AQI (3.3 µg/m³).

Every month since 2023

202628 so far247 days measured2,639th of 2,793 in the world
Jan19#2,547Feb23#2,713Mar26#2,720Apr22#2,738May24#2,572Jun21#2,337Jul44#1,912Aug40#1,998Sep17 daysOct34#1,731
2025too few days for a mean (a year needs 256)255 days measured
Jan1 dayFeb15 daysMar30#2,406Apr37#2,106May31#2,096Jun49#1,652Jul37#2,104Aug16 daysSep36#1,887Oct29#1,954Nov27#2,433Dec18#2,930
2024too few days for a mean (a year needs 257)109 days measured
Jan18 daysFeb19 daysMar33#1,175Apr17 daysMay3 daysJun1 dayJul17 daysAug7 daysSepnoneOctnoneNov3 daysDec1 day
202345 for the year267 days measured854th of 1,355 in the world
Jan43#729Feb1 dayMar8 daysApr39#1,031May52#511Jun51#904Jul43#896Aug49#812Sep61#205Oct22#1,930Nov10 daysDec27#2,033
Each square is a month's mean PM2.5 in US AQI from Grand Island's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Grand Island marked; each year, the year's. A dashed square is the running month, so far.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

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

18 months
MonthWhy
Sep 202617 of 30 days measured; a month needs 21. The others: 10 with no readings from the monitor, 2 with readings for part of the day (a day needs 18 hours), 1 with under 18 hours of readings or readings that failed our checks.
Aug 202516 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks.
Feb 202515 of 28 days measured; a month needs 20. The others: 13 with under 18 hours of readings or readings that failed our checks.
Jan 20251 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Dec 20241 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Nov 20243 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
Oct 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Sep 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 20247 of 31 days measured; a month needs 22. The others: 24 with under 18 hours of readings or readings that failed our checks.
Jul 202417 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks.
Jun 20241 of 30 days measured; a month needs 21. The others: 29 with under 18 hours of readings or readings that failed our checks.
May 20243 of 31 days measured; a month needs 22. The others: 28 with under 18 hours of readings or readings that failed our checks.
Apr 202417 of 30 days measured; a month needs 21. The others: 13 with under 18 hours of readings or readings that failed our checks.
Feb 202419 of 29 days measured; a month needs 21. The others: 1 missing from OpenAQ's archive, 9 with under 18 hours of readings or readings that failed our checks.
Jan 202418 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks.
Nov 202310 of 30 days measured; a month needs 21. The others: 20 with under 18 hours of readings or readings that failed our checks.
Mar 20238 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive, 3 with under 18 hours of readings or readings that failed our checks.
Feb 20231 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive, 2 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.

Grand Island's worst months

MonthUS AQIDays measuredWorld rankEpisode
September 2023 6114.2 µg/m³25 of 30205thof 2,176Northern United States and Canada, August and September 2023
May 2023 529.7 µg/m³30 of 31511thof 1,600Northern United States and Canada, May 2023
June 2023 519.3 µg/m³30 of 30904thof 1,603–
August 2023 498.8 µg/m³31 of 31812thof 1,980Northern United States and Canada, August and September 2023
Northern United States, August 2023
June 2025 498.8 µg/m³26 of 301,652ndof 2,508–
July 2026 447.9 µg/m³30 of 311,912thof 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.

Grand Island's worst days

DayUS AQIEpisode
6 Sept 2023 16271.0 µg/m³Northern United States and Canada, August and September 2023
7 Sept 2023 15459.5 µg/m³Northern United States and Canada, August and September 2023
18 May 2023 13549.2 µg/m³Northern United States and Canada, May 2023
1 Aug 2025 11842.5 µg/m³North-eastern United States and Canada, 29 July to 9 August 2025
2 Aug 2025 10938.9 µg/m³North-eastern United States and Canada, 29 July to 9 August 2025
8 Sept 2023 9734.0 µg/m³Northern United States and Canada, August and September 2023
30 Aug 2023 8326.5 µg/m³Northern United States and Canada, August and September 2023
Northern United States, August 2023
19 May 2023 8024.8 µg/m³Northern United States and Canada, May 2023
6 Jan 2023 7723.0 µg/m³–
26 Jul 2024 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, Grand Island, 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/grand-island/history (accessed 12 Oct 2026).

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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.

Grand Island now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-12 22:07 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).