SmogRank / United States / California / Ridgecrest

Ridgecrest, month by month

Ridgecrest has a measured daily mean on 852 days since 11 January 2023. Its worst month was August 2024, at 36 US AQI (6.5 µg/m³), 1,654th of 2,010 cities on that month's world ranking. Its cleanest was October 2025, at 9 US AQI (1.7 µg/m³).

Every month since 2023

202626 so far283 days measured3,084th of 3,214 in the world
Jan14#2,953Feb17#3,134Mar26#3,044Apr22#3,071May31#2,446Jun33#2,409Jul31#2,735Aug36#2,453Sep27#2,702Oct21#2,977
202521 for the year358 days measured2,893rd of 2,926 in the world
Jan15#2,735Feb13#2,838Mar13#3,087Apr27#2,797May32#2,298Jun36#2,627Jul32#2,488Aug28#2,879Sep19#3,154Oct9#3,009Nov13#2,917Dec11#3,186
2024too few days for a mean (a year needs 257)156 days measured
JannoneFeb1 dayMar1 dayAprnoneMaynoneJunnoneJul2 daysAug36#1,654Sep29#1,697Oct28#1,775Nov18#2,541Dec13#2,596
2023too few days for a mean (a year needs 256)55 days measured
Jan6 daysFeb13#1,126Mar20 daysApr3 daysMaynoneJunnoneJul1 dayAugnoneSepnoneOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Ridgecrest'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 Ridgecrest marked; each year, the year's. A dashed square is the running month, so far.
Good0–50
Moderate51–100
Unhealthy for 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
Jul 20242 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks.
Jun 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Mar 20241 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Feb 20241 of 29 days measured; a month needs 21. The others: 28 with under 18 hours of readings or readings that failed our checks.
Jan 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Dec 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Sep 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 20231 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Jun 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 20233 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
Mar 202320 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Jan 20236 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 14 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.

Ridgecrest's worst months

MonthUS AQIDays measuredWorld rank
August 2024 366.5 µg/m³31 of 311,654thof 2,010
August 2026 366.5 µg/m³31 of 312,453rdof 3,210
June 2025 366.4 µg/m³30 of 302,627thof 3,112
June 2026 336.0 µg/m³30 of 302,409thof 3,235
July 2025 325.8 µg/m³31 of 312,488thof 3,073
May 2025 325.7 µg/m³31 of 312,298thof 3,125

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.

Ridgecrest's worst days

DayUS AQI
30 Jul 2024 8225.9 µg/m³
17 May 2026 7119.6 µg/m³
9 Aug 2025 7019.3 µg/m³
30 Aug 2026 6415.9 µg/m³
31 Jul 2024 6013.7 µg/m³
27 Mar 2026 6013.7 µg/m³
14 Sept 2024 5812.8 µg/m³
1 Jun 2025 5511.4 µg/m³
24 Jun 2025 5511.3 µg/m³
14 Jul 2025 5511.2 µg/m³

Daily means, the highest since 11 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, Ridgecrest, United States, 11 Jan 2023 – 10 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/ridgecrest/history (accessed 13 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.

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

Updated 2026-10-13 21:07 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).