SmogRank / Mexico / México

Air quality in San Francisco Tlalcilalcalpan

México, Mexico. PM2.5 from 1 reference monitor, updated hourly.

21.0µg/m³
Moderate

Latest hour (18:00 UTC), 1.4× the WHO 24-hour guideline. 24-hour average 20.3 µg/m³.

Rank among 982 cities

24 hours#60of 982, at 20.3 µg/m³
7 days–not enough data
30 days–not enough data
This year–not enough data

The last 12 months, day by day

1102031Oct 2025NovDecJan 2026FebMarAprMayJunJulAugSep2025-10-01: 31.1 µg/m³2025-10-02: no data2025-10-03: 23.5 µg/m³2025-10-04: 26.2 µg/m³2025-10-05: 18.6 µg/m³2025-10-06: 18.8 µg/m³2025-10-07: 20.3 µg/m³2025-10-08: no data2025-10-09: no data2025-10-10: 14.8 µg/m³2025-10-11: 20.4 µg/m³2025-10-12: no data2025-10-13: no data2025-10-14: 21.5 µg/m³2025-10-15: 22.2 µg/m³2025-10-16: 25.4 µg/m³2025-10-17: 31.7 µg/m³2025-10-18: 39.6 µg/m³2025-10-19: no data2025-10-20: no data2025-10-21: no data2025-10-22: no data2025-10-23: 20.7 µg/m³2025-10-24: no data2025-10-25: 30.0 µg/m³2025-10-26: 43.5 µg/m³2025-10-27: 33.0 µg/m³2025-10-28: 27.5 µg/m³2025-10-29: 21.6 µg/m³2025-10-30: 25.9 µg/m³2025-10-31: 28.3 µg/m³2025-11-01: 33.4 µg/m³2025-11-02: 38.5 µg/m³2025-11-03: 30.2 µg/m³2025-11-04: 26.6 µg/m³2025-11-05: 28.8 µg/m³2025-11-06: 26.9 µg/m³2025-11-07: 32.5 µg/m³2025-11-08: no data2025-11-09: no data2025-11-10: no data2025-11-11: 20.5 µg/m³2025-11-12: 35.7 µg/m³2025-11-13: 26.8 µg/m³2025-11-14: 28.9 µg/m³2025-11-15: 31.3 µg/m³2025-11-16: no data2025-11-17: no data2025-11-18: 38.2 µg/m³2025-11-19: 33.3 µg/m³2025-11-20: no data2025-11-21: 44.9 µg/m³2025-11-22: 35.3 µg/m³2025-11-23: no data2025-11-24: no data2025-11-25: no data2025-11-26: 38.2 µg/m³2025-11-27: 29.4 µg/m³2025-11-28: 21.1 µg/m³2025-11-29: 34.1 µg/m³2025-11-30: 36.0 µg/m³2025-12-01: 28.5 µg/m³2025-12-02: 32.0 µg/m³2025-12-03: 30.2 µg/m³2025-12-04: 29.3 µg/m³2025-12-05: 34.0 µg/m³2025-12-06: 34.2 µg/m³2025-12-07: 31.3 µg/m³2025-12-08: 35.1 µg/m³2025-12-09: 27.0 µg/m³2025-12-10: 24.4 µg/m³2025-12-11: 26.8 µg/m³2025-12-12: 38.6 µg/m³2025-12-13: no data2025-12-14: no data2025-12-15: no data2025-12-16: 28.8 µg/m³2025-12-17: 29.2 µg/m³2025-12-18: 33.7 µg/m³2025-12-19: 33.7 µg/m³2025-12-20: no data2025-12-21: no data2025-12-22: no data2025-12-23: 30.3 µg/m³2025-12-24: no data2025-12-25: no data2025-12-26: 29.9 µg/m³2025-12-27: 33.2 µg/m³2025-12-28: no data2025-12-29: no data2025-12-30: 23.4 µg/m³2025-12-31: 35.3 µg/m³2026-01-01: no data2026-01-02: no data2026-01-03: no data2026-01-04: no data2026-01-05: no data2026-01-06: no data2026-01-07: no data2026-01-08: no data2026-01-09: no data2026-01-10: no data2026-01-11: no data2026-01-12: no data2026-01-13: no data2026-01-14: no data2026-01-15: no data2026-01-16: no data2026-01-17: no data2026-01-18: no data2026-01-19: no data2026-01-20: no data2026-01-21: no data2026-01-22: no data2026-01-23: no data2026-01-24: no data2026-01-25: no data2026-01-26: no data2026-01-27: no data2026-01-28: no data2026-01-29: no data2026-01-30: no data2026-01-31: no data2026-02-01: no data2026-02-02: no data2026-02-03: no data2026-02-04: no data2026-02-05: no data2026-02-06: no data2026-02-07: no data2026-02-08: no data2026-02-09: no data2026-02-10: no data2026-02-11: no data2026-02-12: no data2026-02-13: no data2026-02-14: no data2026-02-15: 34.8 µg/m³2026-02-16: 33.4 µg/m³2026-02-17: 34.8 µg/m³2026-02-18: 31.9 µg/m³2026-02-19: 32.9 µg/m³2026-02-20: 34.4 µg/m³2026-02-21: no data2026-02-22: no data2026-02-23: no data2026-02-24: 29.3 µg/m³2026-02-25: 32.0 µg/m³2026-02-26: 30.1 µg/m³2026-02-27: 32.4 µg/m³2026-02-28: no data2026-03-01: no data2026-03-02: no data2026-03-03: no data2026-03-04: 35.5 µg/m³2026-03-05: 34.3 µg/m³2026-03-06: 30.4 µg/m³2026-03-07: 29.1 µg/m³2026-03-08: no data2026-03-09: no data2026-03-10: 35.7 µg/m³2026-03-11: 35.7 µg/m³2026-03-12: 29.8 µg/m³2026-03-13: 29.5 µg/m³2026-03-14: no data2026-03-15: no data2026-03-16: no data2026-03-17: no data2026-03-18: no data2026-03-19: 32.5 µg/m³2026-03-20: 22.9 µg/m³2026-03-21: 25.1 µg/m³2026-03-22: 27.2 µg/m³2026-03-23: 24.9 µg/m³2026-03-24: 31.5 µg/m³2026-03-25: 31.6 µg/m³2026-03-26: 27.7 µg/m³2026-03-27: 25.7 µg/m³2026-03-28: 24.3 µg/m³2026-03-29: 25.9 µg/m³2026-03-30: 22.5 µg/m³2026-03-31: 17.7 µg/m³2026-04-01: 23.3 µg/m³2026-04-02: 27.8 µg/m³2026-04-03: no data2026-04-04: no data2026-04-05: no data2026-04-06: no data2026-04-07: 23.1 µg/m³2026-04-08: 26.4 µg/m³2026-04-09: 23.6 µg/m³2026-04-10: 25.5 µg/m³2026-04-11: 30.7 µg/m³2026-04-12: no data2026-04-13: no data2026-04-14: 23.4 µg/m³2026-04-15: 30.9 µg/m³2026-04-16: 33.6 µg/m³2026-04-17: 30.8 µg/m³2026-04-18: no data2026-04-19: no data2026-04-20: no data2026-04-21: no data2026-04-22: no data2026-04-23: no data2026-04-24: no data2026-04-25: no data2026-04-26: no data2026-04-27: no data2026-04-28: no data2026-04-29: no data2026-04-30: no data2026-05-01: no data2026-05-02: no data2026-05-03: no data2026-05-04: no data2026-05-05: no data2026-05-06: no data2026-05-07: no data2026-05-08: no data2026-05-09: no data2026-05-10: no data2026-05-11: no data2026-05-12: no data2026-05-13: no data2026-05-14: no data2026-05-15: no data2026-05-16: no data2026-05-17: no data2026-05-18: no data2026-05-19: no data2026-05-20: no data2026-05-21: no data2026-05-22: no data2026-05-23: no data2026-05-24: no data2026-05-25: no data2026-05-26: no data2026-05-27: no data2026-05-28: no data2026-05-29: no data2026-05-30: no data2026-05-31: no data2026-06-01: no data2026-06-02: no data2026-06-03: no data2026-06-04: no data2026-06-05: no data2026-06-06: no data2026-06-07: no data2026-06-08: no data2026-06-09: no data2026-06-10: no data2026-06-11: no data2026-06-12: no data2026-06-13: no data2026-06-14: no data2026-06-15: no data2026-06-16: no data2026-06-17: no data2026-06-18: no data2026-06-19: no data2026-06-20: no data2026-06-21: no data2026-06-22: no data2026-06-23: no data2026-06-24: no data2026-06-25: no data2026-06-26: no data2026-06-27: no data2026-06-28: no data2026-06-29: no data2026-06-30: no data2026-07-01: no data2026-07-02: no data2026-07-03: no data2026-07-04: no data2026-07-05: no data2026-07-06: no data2026-07-07: no data2026-07-08: no data2026-07-09: no data2026-07-10: no data2026-07-11: no data2026-07-12: no data2026-07-13: no data2026-07-14: no data2026-07-15: no data2026-07-16: no data2026-07-17: no data2026-07-18: no data2026-07-19: no data2026-07-20: no data2026-07-21: no data2026-07-22: no data2026-07-23: no data2026-07-24: no data2026-07-25: no data2026-07-26: no data2026-07-27: no data2026-07-28: no data2026-07-29: no data2026-07-30: no data2026-07-31: no data2026-08-01: no data2026-08-02: no data2026-08-03: no data2026-08-04: no data2026-08-05: no data2026-08-06: no data2026-08-07: no data2026-08-08: 28.7 µg/m³2026-08-09: no data2026-08-10: no data2026-08-11: 29.1 µg/m³2026-08-12: 23.4 µg/m³2026-08-13: 26.6 µg/m³2026-08-14: 31.5 µg/m³2026-08-15: no data2026-08-16: no data2026-08-17: no data2026-08-18: 27.3 µg/m³2026-08-19: 22.8 µg/m³2026-08-20: 27.4 µg/m³2026-08-21: 24.5 µg/m³2026-08-22: no data2026-08-23: no data2026-08-24: no data2026-08-25: 22.9 µg/m³2026-08-26: 26.7 µg/m³2026-08-27: 28.0 µg/m³2026-08-28: no data2026-08-29: no data2026-08-30: no data2026-08-31: no data2026-09-01: no data2026-09-02: 21.1 µg/m³2026-09-03: 22.7 µg/m³2026-09-04: no data2026-09-05: no data2026-09-06: no data2026-09-07: no data2026-09-08: 19.9 µg/m³2026-09-09: 21.4 µg/m³2026-09-10: 23.0 µg/m³2026-09-11: 22.5 µg/m³2026-09-12: no data2026-09-13: no data2026-09-14: no data2026-09-15: no data2026-09-16: no data2026-09-17: no data2026-09-18: 17.6 µg/m³2026-09-19: no data2026-09-20: no data2026-09-21: no data2026-09-22: 26.6 µg/m³2026-09-23: 22.5 µg/m³2026-09-24: 29.5 µg/m³2026-09-25: 21.1 µg/m³2026-09-26: no data2026-09-27: no data2026-09-28: no data2026-09-29: 17.4 µg/m³2026-09-30: 20.6 µg/m³
129 of 130 measured days were over the WHO 24-hour guideline (15 µg/m³). One row per month, one square per local day.
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

Last 4 days, hour by hour

15362026-10-01 00:00 UTC: 17.0 µg/m³2026-10-01 01:00 UTC: 13.0 µg/m³2026-10-01 02:00 UTC: 23.0 µg/m³2026-10-01 03:00 UTC: 25.0 µg/m³2026-10-01 04:00 UTC: 27.0 µg/m³2026-10-01 05:00 UTC: 21.0 µg/m³2026-10-01 07:00 UTC: 13.0 µg/m³2026-10-01 08:00 UTC: 19.0 µg/m³2026-10-01 09:00 UTC: 16.0 µg/m³2026-10-01 10:00 UTC: 13.0 µg/m³2026-10-01 11:00 UTC: 15.0 µg/m³2026-10-01 12:00 UTC: 16.0 µg/m³2026-10-01 13:00 UTC: 23.0 µg/m³2026-10-01 14:00 UTC: 24.0 µg/m³2026-10-01 15:00 UTC: 36.0 µg/m³2026-10-01 16:00 UTC: 25.0 µg/m³2026-10-01 17:00 UTC: 19.0 µg/m³2026-10-01 18:00 UTC: 21.0 µg/m³Sep 28Sep 29Sep 30Oct 1
Times in UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Its world rank, day by day

#1#461OctNovDecJanFebMarAprMayJunJulAugSep
Rank on each day's board (1 = most polluted city that day).

2026 against 2025, month by month

15JanFeb 2026: 32.6 µg/m³FebMar 2025: 31.3 µg/m³Mar 2026: 28.5 µg/m³MarApr 2026: 27.2 µg/m³AprMayJunJul 2025: 26.2 µg/m³JulAug 2025: 24.4 µg/m³Aug 2026: 26.6 µg/m³AugSep 2025: 23.9 µg/m³Sep 2026: 22.0 µg/m³SepOct 2025: 25.9 µg/m³OctNov 2025: 31.9 µg/m³NovDec 2025: 30.9 µg/m³Dec
Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 22.2 µg/m³22.22025no data2024no data20232023: 25.1 µg/m³25.1
Mean PM2.5 for 24 Sept to 30 Sept in each year. Dashed line: WHO 24-hour guideline.

Monitors

StationOperatorType
Almoloya de JuárezMexico SINAICA Terms and ConditionsSinaica MexicoReference

The city's value is the median of its reference monitors each hour; low-cost sensors are listed but not counted when reference monitors exist. Data via OpenAQ; licences as listed. How we rank. Embed this on your site.

Other cities in Mexico

30-day averages, µg/m³. All of Mexico.

Updated 2026-10-01 19:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.