SmogRank / Hacienda Santa Fe / Mérida
Hacienda Santa Fe vs Mérida: PM2.5 compared
Over the last year, Hacienda Santa Fe's air was about 2.2× as polluted as Mérida's: PM2.5 averaged 32.6 µg/m³ against 14.5, on the 232 days both cities were measured. Hacienda Santa Fe had the dirtier air on 211 of those days, Mérida on 21. Hacienda Santa Fe was over the WHO's daily guideline of 15 µg/m³ on 229 of them, Mérida on 51.
Right now
The last year, day by day
Month by month
Year by year
| Year | Hacienda Santa Fe | Mérida | Days Hacienda Santa Fe was worse |
|---|---|---|---|
| 2026 so far | 89 | 65 | 144 |
| 2025 | 94 | 57 | 149 |
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
Mérida
- 13 Jul 2026412281.0 µg/m³
- 12 Jul 202618198.2 µg/m³
- 16 Aug 202615662.1 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).
Mérida
Side by side with Tuxtla (the nearest), Gujranwala (the world's worst on 30 days).
Use this page
SmogRank, PM2.5 daily means compared, Hacienda Santa Fe and Mérida, 9 Oct 2025 – 8 Oct 2026, smogrank.com/compare/mx-hacienda-santa-fe/mx-merida (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).