Air quality in San Nicolás de los Garza, Nuevo León, Mexico today

Mr. Duck’s Air Quality Score

Moderate air today for San Nicolás de los Garza, Nuevo León, Mexico

⚠️ This website is currently under active development. Some data may be incomplete or temporarily inaccurate. For health-critical decisions, please verify information through official government or environmental sources.

Categories follow US EPA AQI breakpoints for PM (estimate from latest valid measurements; this project does not compute EPA NowCast/24-hour AQI yet).

This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.

Air quality today

The air quality in San Nicolás de los Garza is currently classified as Moderate. The primary pollutant identified is PM2.5, with a measured concentration of 32.83 µg/m³. In addition, the PM10 level stands at 44.0 µg/m³ based on sixteen valid observations.

These values are presented through OpenAQ data for this location. This page is informational; for health guidance, use official sources such as EPA AirNow or WHO.

Latest sensor values

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

What the data includes

The OpenAQ feed for San Nicolás de los Garza currently contains data from three monitoring stations, each providing up to eight pollutant measurements. All of the common urban contaminants are represented: carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), ozone (O₃), particulate matter ≤10 µm (PM10), particulate matter ≤2.5 µm (PM2.5) and sulfur dioxide (SO₂). The most recent observations for every pollutant were recorded on 2026‑02‑10 at 22:00 UTC, so the dataset is fresh within the last week.

Across the three stations the observed values show a fairly wide spread. Ozone ranges from 0.004 ppm to 0.045 ppm with a median of about 0.028 ppm; carbon monoxide varies between 0.30 ppm and 2.08 ppm, centering on a median of 0.81 ppm. Particulate matter shows the greatest absolute variation: PM10 values run from 36 µg/m³ up to 86 µg/m³ (median 44 µg/m³) while PM2.5 spans 6.9 µg/m³ to 32.8 µg/m³ (median 23 µg/m³). The nitrogen‑oxide family is comparatively narrow, with NO between 0.0025 ppm and 0.0146 ppm (median 0.011 ppm), NO₂ from 0.007 ppm to 0.0222 ppm (median 0.014 ppm) and NOX from 0.0096 ppm to 0.0368 ppm (median 0.0255 ppm). Sulfur dioxide is the least variable, staying between 0.0039 ppm and 0.0074 ppm (median 0.0061 ppm).

Because only three stations contribute data, coverage across the city is limited; many neighborhoods may not be represented at all. While every pollutant has at least one recent reading, the number of rows per parameter differs—four rows for O₃, PM10 and PM2.5 versus three rows for the gases—so the statistical picture is uneven. Users should keep in mind that conditions can change locally and over time, and the current dataset reflects a snapshot from early February rather than continuous monitoring throughout San Nicolás de los Garza.

Learn more about sources and filtering: About the data.

Trusted references: WHO (Air pollution) · US EPA AirNow · European Environment Agency (Air)

Latest sensor values (bars)

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

Data notes

The data shown for San Nicolás de los Garza is based on 16 valid measurements and was refreshed recently, with the latest update recorded at 2026‑02‑10T22:00:00+00:00 (updated within 3 days). This snapshot reflects conditions at a specific time; air quality can differ across neighborhoods and change throughout the day, so values may not represent every location or moment in the city.

OpenAQ station rows