SmogRank / United States / California / Turlock
Turlock, month by month
Turlock has a measured daily mean on 1,328 days since 1 January 2023. Its worst month was December 2024, at 73 US AQI (20.7 µg/m³), 237th of 2,616 cities on that month's world ranking. Its cleanest was March 2023, at 26 US AQI (4.7 µg/m³). 2025 averaged 46 US AQI (8.3 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
Turlock's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| December 2024 | 7320.7 µg/m³ | 237thof 2,616 | California, United States, December 2024 California and Oregon, United States, December 2024 |
| December 2023 | 6918.8 µg/m³ | 182ndof 2,247 | Western United States and Mexico, December 2023 California and Oregon, United States, December 2023 |
| November 2023 | 6315.5 µg/m³ | 139thof 2,243 | – |
| January 2025 | 6215.1 µg/m³ | 483rdof 2,474 | – |
| January 2026 | 5812.8 µg/m³ | 886thof 2,617 | California, United States, 30 January to 6 February 2026 |
| February 2026 | 5712.4 µg/m³ | 979thof 2,866 | California, United States, 30 January to 6 February 2026 |
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.
Turlock's worst days
| Day | US AQI | Episode |
|---|---|---|
| 7 Dec 2024 | 12846.5 µg/m³ | California and Oregon, United States, December 2024 |
| 6 Dec 2024 | 11742.1 µg/m³ | California and Oregon, United States, December 2024 |
| 16 Dec 2023 | 11541.0 µg/m³ | California and Oregon, United States, December 2023 |
| 5 Dec 2024 | 11240.1 µg/m³ | California and Oregon, United States, December 2024 |
| 31 Aug 2023 | 10737.9 µg/m³ | North-western United States and Canada, August 2023 |
| 20 Dec 2024 | 10637.6 µg/m³ | California, United States, December 2024 |
| 17 Dec 2023 | 10537.0 µg/m³ | California and Oregon, United States, December 2023 |
| 4 Dec 2024 | 10436.8 µg/m³ | California and Oregon, United States, December 2024 |
| 27 Dec 2023 | 10035.4 µg/m³ | Western United States and Mexico, December 2023 |
| 15 Dec 2023 | 9934.8 µg/m³ | California and Oregon, United States, December 2023 |
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, Turlock, 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/turlock/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.
Turlock 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).