SmogRank / United States / Nevada / Enterprise

Enterprise, month by month

Enterprise has a measured daily mean on 1,369 days since 1 January 2023. Its worst month was August 2025, at 47 US AQI (8.4 µg/m³), 1,674th of 2,901 cities on that month's world ranking. Its cleanest was March 2024, at 15 US AQI (2.7 µg/m³). 2025 averaged 28 US AQI (5.0 µg/m³), against 24 US AQI (4.4 µg/m³) in 2024.

Every month since 2023

202623 so far284 days measured2,727th of 2,791 in the world
Jan24#2,441Feb20#2,774Mar23#2,779Apr18#2,850May27#2,415Jun27#2,196Jul25#2,658Aug30#2,658Sep19#2,867Oct21#2,557
202528 for the year358 days measured2,528th of 2,681 in the world
Jan26#2,280Feb26#2,429Mar22#2,666Apr24#2,696May28#2,302Jun33#2,196Jul33#2,337Aug47#1,674Sep23#2,893Oct22#2,417Nov22#2,575Dec23#2,831
202424 for the year365 days measured2,015th of 2,097 in the world
Jan21#2,280Feb16#2,444Mar15#1,652Apr17#2,410May22#2,440Jun29#2,195Jul38#1,765Aug26#1,927Sep44#871Oct25#1,870Nov17#2,562Dec23#2,424
202324 for the year362 days measured1,312th of 1,355 in the world
Jan21#1,198Feb24#1,087Mar16#898Apr28#1,342May28#1,430Jun29#1,394Jul30#1,177Aug20#1,946Sep23#2,096Oct23#1,908Nov22#2,126Dec23#2,126
Each square is a month's mean PM2.5 in US AQI from Enterprise'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 Enterprise 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

Enterprise's worst months

MonthUS AQIDays measuredWorld rankEpisode
August 2025 478.4 µg/m³31 of 311,674thof 2,901–
September 2024 447.9 µg/m³30 of 30871stof 2,010Nevada and Utah, United States, September 2024
July 2024 386.8 µg/m³31 of 311,765thof 2,566–
June 2025 335.9 µg/m³30 of 302,196thof 2,508–
July 2025 335.9 µg/m³31 of 312,337thof 2,889–
July 2023 305.4 µg/m³31 of 311,177thof 1,432–

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.

Enterprise's worst days

DayUS AQIEpisode
11 Sept 2024 14252.0 µg/m³Nevada and Utah, United States, September 2024
27 Jul 2024 8828.7 µg/m³–
16 Jun 2024 8024.8 µg/m³–
4 Aug 2025 7924.0 µg/m³–
21 Feb 2023 7421.3 µg/m³–
12 Sept 2024 7220.2 µg/m³–
5 Sept 2024 7019.4 µg/m³–
6 Sept 2024 7019.2 µg/m³–
8 Aug 2025 6818.3 µg/m³–
31 Jul 2023 6616.9 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, Enterprise, 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/enterprise/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.

Enterprise 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).