SmogRank / Hacienda Santa Fe / San Juan del Río
Hacienda Santa Fe vs San Juan del Río: PM2.5 compared
Over the last year, Hacienda Santa Fe's air was about 2.3× as polluted as San Juan del Río's: PM2.5 averaged 31.6 µg/m³ against 13.6, on the 302 days both cities were measured. Hacienda Santa Fe had the dirtier air on 297 of those days, San Juan del Río on 5. Hacienda Santa Fe was over the WHO's daily guideline of 15 µg/m³ on 294 of them, San Juan del Río on 108.
Right now
The last year, day by day
Month by month
Year by year
| Year | Hacienda Santa Fe | San Juan del Río | Days Hacienda Santa Fe was worse |
|---|---|---|---|
| 2026 so far | 88 | 60 | 214 |
| 2025 | 92 | 60 | 192 |
Means in US AQI over the days both cities were measured that year; a year shows once they share 30 such days.
Each city's worst days
Hacienda Santa Fe
- 1 Jan 2026213138.0 µg/m³
- 25 Dec 2025202127.0 µg/m³
- 20 May 2026198123.0 µg/m³
San Juan del Río
- 1 Jan 20269633.0 µg/m³
- 5 Jan 20269130.7 µg/m³
- 19 Feb 20268728.3 µg/m³
Daily means in US AQI, with µg/m³ beside them, since the index stops at its top value, over the days both cities were measured in the last year. Each date opens that day's world board.
Compare either city with another
Hacienda Santa Fe
Side by side with Santa Anita (the nearest), Mexicali (Mexico's 2nd worst on 30 days), Gujranwala (the world's worst on 30 days).
San Juan del Río
Side by side with Huichapan (the nearest), Gujranwala (the world's worst on 30 days).
Use this page
SmogRank, PM2.5 daily means compared, Hacienda Santa Fe and San Juan del Río, 9 Oct 2025 – 8 Oct 2026, smogrank.com/compare/mx-hacienda-santa-fe/mx-san-juan-del-rio (accessed 9 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.
The same rules as every SmogRank figure: reference monitors first, and a day counts with 18 measured hours. How we measure.
Updated 2026-10-09 07:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); Love My Air (City and County of Denver), no reuse terms published (why we use them).