Air quality
Air quality in Ciudad López Mateos today
Updated
Good (US AQI 43) Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. Model estimate for Sun, Oct 25, 6:00 pm (00:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Ciudad López Mateos, México, Mexico, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 43 Good
- PM2.5
- 8 µg/m³ 0.5× WHO 24-h guideline
- PM10
- 8.8 µg/m³
- Ozone
- 55 µg/m³
- Dominant pollutant
- PM2.5 sub-index 43
- Best hour today
- 9:00 pm AQI 38
- European AQI
- 39
Air quality in Ciudad López Mateos right now
Right now the modelled US Air Quality Index for Ciudad López Mateos, México, Mexico is 43, which falls in the "Good" band (up to 50). Air quality is satisfactory and poses little or no risk; a good time for outdoor activity.
The index is driven mainly by PM2.5, whose own sub-index is 43. Fine and coarse particles come from traffic, heating, industry, dust and smoke; they build up on calm nights and clear when wind or rain arrives.
PM2.5 is 8 µg/m³, within the WHO 24-hour guideline of 15 µg/m³; PM10 is 8.8 µg/m³ against a guideline of 45; ozone is 55 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 25 µg/m³ (right at the 24-hour guideline of 25).
Also this hour: carbon monoxide 205 µg/m³.
NASA FIRMS shows 17 fire hotspots within 300 km in the last day (nearest about 38 km), but particle levels are not elevated enough to point to smoke right now.
Ciudad López Mateos AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 38 around Sun 9:00 pm to 50 around Mon 2:00 pm, staying "Good" throughout.
The following day is expected to be worse, averaging about 55 against 43 for the next 24 hours.
| Local time (America/Mexico_City) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Sun 6:00 pm | 43 | Good | 8 | 9 | 55 |
| Sun 9:00 pm | 38 | Good | 10.9 | 12 | 20 |
| Mon 12:00 am | 38 | Good | 8.5 | 9 | 24 |
| Mon 3:00 am | 39 | Good | 9.6 | 10 | 23 |
| Mon 6:00 am | 42 | Good | 9.1 | 9 | 26 |
| Mon 9:00 am | 46 | Good | 10.4 | 11 | 45 |
| Mon 12:00 pm | 49 | Good | 7.6 | 8 | 112 |
| Mon 3:00 pm | 50 | Good | 7 | 7 | 112 |
| Mon 6:00 pm | 50 | Good | 12.3 | 13 | 45 |
| Mon 9:00 pm | 51 | Moderate | 15.8 | 16 | 10 |
| Tue 12:00 am | 53 | Moderate | 17 | 17 | 6 |
| Tue 3:00 am | 55 | Moderate | 13.5 | 14 | 14 |
| Tue 6:00 am | 55 | Moderate | 12.6 | 13 | 14 |
| Tue 9:00 am | 57 | Moderate | 18.3 | 19 | 38 |
| Tue 12:00 pm | 58 | Moderate | 11 | 11 | 120 |
| Tue 3:00 pm | 59 | Moderate | 12.8 | 13 | 133 |
| Tue 6:00 pm | 61 | Moderate | 27.6 | 28 | 38 |
Every third hour of the CAMS forecast via Open-Meteo. US AQI uses rolling averages (24 h for particles, 8 h for ozone), so it moves more slowly than the hourly concentrations.
Best time to be outside in Ciudad López Mateos today
Between 6 am and 9 pm local time, the cleanest air today is forecast around 9:00 pm (AQI 38, Good) and the worst around 6:00 pm (AQI 43). The difference across the day is small, so timing matters little.
Ciudad López Mateos vs the rest of Mexico
Across 96 Mexico cities we track, the average US AQI right now is 46 (Good). Ciudad López Mateos at 43 is about average.
It ranks 40 of 96 from cleanest to most polluted; the cleanest is Ciudad Obregón (33) and the most polluted Jiutepec (87).
For context, the median across 3,556 cities worldwide is 58.
Air quality in cities near Ciudad López Mateos
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Tlalnepantla | 4 km | 41 | Good | 8.1 |
| Naucalpan de Juárez | 7 km | 41 | Good | 8.1 |
| Azcapotzalco | 8 km | 41 | Good | 8.1 |
| Buenavista | 10 km | 41 | Good | 8.1 |
| Cuautitlán Izcalli | 11 km | 41 | Good | 8.1 |
| Villa Nicolás Romero | 12 km | 41 | Good | 8.1 |
| Miguel Hidalgo | 13 km | 41 | Good | 8.1 |
| Gustavo Adolfo Madero | 14 km | 41 | Good | 8.1 |
Model vs measured
The nearest measured PM2.5 reading is 6.3 µg/m³ from Sensor.Community (median of 3 sensors), centred about 11 km from the city centre. That is close to the model estimate of 8 µg/m³. Low-cost sensors can read high in humid air; reference monitors are more accurate but sparser.
Advice for sensitive groups
With the AQI at 43, there is no need for sensitive groups to change plans. People with asthma should still carry their reliever inhaler as usual.
What the US AQI numbers mean
| US AQI | Category | What it means |
|---|---|---|
| 0-50 | Good | Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. |
| 51-100 | Moderate | Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. |
| 101-150 | Unhealthy for Sensitive Groups | People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors. |
| 151-200 | Unhealthy | Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed. |
| 201-300 | Very Unhealthy | Health alert: everyone should avoid prolonged or heavy exertion outdoors, and sensitive groups should stay indoors. |
| 301-500 | Hazardous | Emergency conditions: everyone should avoid all outdoor physical activity and stay indoors with filtered air if possible. The scale tops out at 500; heavier dust or smoke is shown as 500. |
Values on this page are modelled by CAMS (Copernicus) and served by Open-Meteo; they are estimates for the area around the city centre, not readings from an official monitor.
Nearby cities
More for Ciudad López Mateos
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), Sensor.Community, NASA FIRMS.