Air quality in Silao (Ciudad), Guanajuato, Mexico today

Mr. Duck’s Air Quality Score

Moderate air today for Silao (Ciudad), Guanajuato, 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 Silao (Ciudad), Guanajuato is classified as Moderate today. The primary pollutant identified is PM2.5, with a measured concentration of 15.80059 µg/m³, while the accompanying PM10 level stands at 81.594062 µg/m³ based on eight valid observations.

These values are presented through OpenAQ data. 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 Silao air‑quality record draws from two monitoring sites that together provide thirteen recent data rows. All eight common pollutants 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 update for every pollutant comes from the Hospital General sensor on 2026‑02‑10 at 22:00 UTC, so the freshest values are less than a week old.

Across the dataset the measured concentrations show modest variation. CO ranges from 1.35 ppm to 2.90 ppm with a median of about 2.13 ppm; O₃ spans 0.003 ppm up to 0.048 ppm, median roughly 0.026 ppm; PM₁₀ varies between 58 µg/m³ and 81.6 µg/m³, median near 70 µg/m³; PM₂.₅ is tightly clustered from 15.2 to 15.8 µg/m³, median about 15.5 µg/m³. The nitrogen‑oxide family shows single‑value entries: NO at 0.0047 ppm, NO₂ at 0.0050 ppm and NOX at 0.0097 ppm, each recorded once. SO₂ is measured between 0.00713 ppm and 0.008 ppm, median roughly 0.00756 ppm.

While the data are current for the two stations, coverage is uneven: the larger pollutants (CO, O₃, PM₁₀, PM₂.₅, SO₂) have multiple rows allowing a sense of range and typical values, whereas NO, NO₂ and NOX appear only once each, limiting insight into their variability. Overall, the dataset provides a recent snapshot for Silao but reflects limited spatial sampling; conditions can differ across neighborhoods and over time beyond what these thirteen rows capture.

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 current dataset for Silao includes eight valid measurements and is marked as Updated within 3 days, with the latest values recorded on 2026‑02‑10 at 22:00 UTC. This information reflects a single snapshot in time; air quality can differ across neighborhoods and change throughout the day, so conditions you experience may not exactly match these reported values.

OpenAQ station rows