Air Quality near Tlaquepaque, Mexico (AQI 249)
Right now
The most recent data we hold from OpenAQ and the agency that runs each station arrived 7 hours ago.
One other detection within 20 km in the last 24 hours, <1 km from here.
This page covers the record dated 21 October 2026. Browse recent observations in this area:
Reported by OpenAQ and the agency that runs each station 9 days ago.
No stronger detection stands among the 7 recorded within 20 km of this point since 13 March 2026 — 3 others scored the same. The last comparable one was on 28 September 2026.
What the source measured
OpenAQ and the agency that runs each station reported: PM2.5 24-hour mean 173.6 µg/m³ at Tlaquepaque, Mexico: Very Unhealthy, AQI 249 on the US EPA scale. 24 of 24 hours measured, ending 2026-10-21 23:00 UTC. Measured by a government monitoring agency via Sinaica Mexico and OpenAQ; licence Mexico SINAICA Terms and Conditions.
The air quality index read 249 (Very Unhealthy) at the Tlaquepaque station.
Urban PEI: 250,565 within a heuristic 5 km radius; not unique people.
This is the highest air quality index we have recorded at this point, over 13 readings since 21 October 2026 — the previous range was 163 to 249.
Nearby, since 13 March 2026
- October 31, 2026 · score 57 · 0.0 km
- October 25, 2026 · score 57 · 0.0 km
- October 22, 2026 · score 57 · 0.0 km
How we know
One source: OpenAQ and the agency that runs each station. Not yet confirmed by a second, independent source.
Our own score for this event is 57 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Event data
| Type | Air Quality |
| Severity | High |
| Calamity Score (ours) | 57 / 100 |
| Legacy data-support index | 0.70/1 |
| Coordinates | 20.6410, -103.3126 |
| Nearest city | Tlaquepaque (2 km) |
| Urban exposure index (PEI) | 250.6K within 5 km |
| Impact tier | severe |
| Timestamp | 2026-10-21T23:00:00.000Z |
| Source | https://explore.openaq.org/locations/7915 |
| Licence | Mexico SINAICA Terms and Conditions · Sinaica Mexico, via OpenAQ |
Physical priority index · v5. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: openaq. Occurrence: 2026-10-21T23:00:00.000Z.
First archived: 2026-10-21T11:19:52.477Z. Material modification: 2026-10-22T00:20:50.327Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score breakdown
Technical details
| Aqi | 249 |
| AqiCategory | Very Unhealthy |
| AqiCategoryVersion | US-EPA-PM25-2024-05-06 |
| AqiProvenance | Calamity: US EPA PM2.5 24-hour breakpoints applied to the station's 24-hour mean; not an official AQI |
| Pm25 | 173.6 |
| MeasurementUnit | ug/m3 |
| AveragingPeriod | 24 hours |
| PeriodFrom | 2026-10-20T23:00:00.000Z |
| PeriodTo | 2026-10-21T23:00:00.000Z |
| HoursMeasured | 24 |
| LatestHourly | 367 |
| StationName | Tlaquepaque |
| StationId | 7915 |
| SensorId | 35927 |
| Locality | San Pedro Tlaquepaque |
| Country | Mexico |
| CountryCode | MX |
| Provider | Sinaica Mexico |
| Licence | Mexico SINAICA Terms and Conditions |
| LicenceUrls | ["https://datos.gob.mx/libreusomx"] |
Safety information
What to do when the air is unhealthy
Three things first, then what each level of the index means. From the US EPA’s AirNow.
For this reportAir Quality · Tlaquepaque
Less effort outdoors
Shorten or move indoors hard activity; the worse the index, the more people it concerns.
AirNowKeep indoor air clean
Windows closed when the air outside is worse, an air purifier if you have one.
AirNowA real mask outside
A well-fitting N95/FFP2 filters fine particles; cloth and surgical masks do little.
AirNow
Before, during, after. Here it is “after”.
Before · When bad air is forecast
Follow the index
Your local air quality index and forecast.
Medicines at hand
If you have asthma or a heart or lung condition, keep your medicines with you.
AirNow (US EPA)
During · While the air is bad
Children, older people, the sick
They are the first to reduce effort outdoors.
Watch for symptoms
Coughing, breathlessness, chest pain: stop and get help if needed.
AirNow (US EPA)
After · When it improves
Air the house
When the outside air is better than inside.
AirNow (US EPA)
Questions people ask
What do the index levels mean?
0-50 good; 51-100 moderate; 101-150 unhealthy for sensitive groups; 151-200 unhealthy, for everyone; 201-300 very unhealthy; over 300 hazardous. Source: AirNow (US EPA).
Who are the sensitive groups?
People with heart or lung disease, older adults, children and teenagers, pregnant women and people who work or exercise outdoors. Source: AirNow (US EPA).
Review the area, threshold and delivery channel in your account.