Air quality in Saint Paul, Minnesota, United States of America today

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Good air today for Saint-Paul, Réunion, France

⚠️ 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 Saint Paul, Minnesota is rated as Good today. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 3.66 µg/m³ and a reference PM10 level of 10.5 µg/m³ based on eleven valid observations.

Data are shown via OpenAQ. 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 Saint Paul air‑quality feed includes five measured variables – fine particulate matter (PM2.5), coarse particles (PM1), relative humidity, temperature and particle count (UM003). Data come from a total of twelve recent rows collected at four monitoring sites across the city. All of the latest readings were recorded on 2026-02-11 01:00 UTC, so the dataset reflects conditions as of that moment for each pollutant.

PM2.5 values span from a low of 3.66 µg/m³ to a high of 13.47 µg/m³, with a median around 7.2 µg/m³ and the middle‑90 % of observations falling between roughly 4.18 and 12.13 µg/m³. PM1 shows a broader relative spread: measurements range from 0.35 to 6.61 µg/m³, the median is about 3.48 µg/m³, and the 10th‑90th percentile band runs from 0.97 to 5.99 µg/m³. Relative humidity in the sampled locations varies between 34.67 % and 46.54 %, centering near 40.6 %; temperature swings from a chilly –8.99 °C up to 5.18 °C, with a median close to –1.91 °C. Particle concentration (UM003) is recorded in the range of 249.5 to 1,006.4 particles per cm³, with a typical value near 628 and most readings falling between about 325 and 931 particles/cm³.

Because each pollutant has data from only two or four rows, coverage is uneven: PM2.5 and PM1 are represented at four stations, while humidity, temperature and UM003 appear in just two. Although the timestamps are all recent, the limited number of observations means city‑wide conditions can differ by neighborhood and time of day, so these figures capture only a snapshot rather than a comprehensive picture of Saint Paul’s air quality.

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 reflect 11 valid measurements and were Updated today (last refreshed at 2026‑02‑11T01:00:00+00:00). These values represent a snapshot of air quality across Saint Paul, Minnesota, but conditions can differ by neighborhood, time of day, and local sources. Use this information as a general guide rather than a precise, location‑specific reading.

OpenAQ station rows