Air quality in Alfaro, Rioja, Spain today

Mr. Duck’s Air Quality Score

Good air today for Alfaro, Rioja, Spain

⚠️ 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 today in Alfaro, Rioja, is classified as Good. The main pollutant measured is PM2.5 (fine particles). According to the latest data shown via OpenAQ, the PM2.5 level is 4.0 µg/m³ and the accompanying PM10 measurement is 6.0 µg/m³, based on four valid observations.

These values indicate that the monitored concentrations are within the reference limits for both fine and coarse particulate matter. 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 dataset for Alfaro in La Rioja contains measurements for seven pollutants – carbon monoxide (CO), nitrogen oxides (NO and NO₂), ozone (O₃), particulate matter of both 10 µm and 2.5 µm size (PM₁₀, PM₂.₅) and sulfur dioxide (SO₂). These values come from a total of thirteen rows recorded at two monitoring stations, so the spatial coverage is limited to a small number of points within the city.

The most recent data are fairly fresh for most gases: NO₂, O₃, PM₁₀, PM₂.₅ were all updated on 2026‑02‑09 03:00 UTC, giving a snapshot that is only a few days old. In contrast, CO and NO rely on older entries from early 2024 (CO last seen on 2024‑02‑26 13:00 UTC, NO on 2024‑01‑12 00:00 UTC), while SO₂ was last reported in early 2025 (2025‑01‑30 12:00 UTC). This mix of recent and dated timestamps means that the picture is up‑to‑date for some pollutants but may not reflect current conditions for others.

Across the available measurements, CO shows a narrow high range from 340 to 400 µg/m³ with a median near 370 µg/m³, indicating consistently elevated levels at the monitored site. NO₂ varies more widely, spanning 3.2 to 11.0 µg/m³ and centering around a median of 7.1 µg/m³, while O₃ ranges from 20 to 36 µg/m³ with a median of 28 µg/m³. Particulate matter is comparatively low: PM₁₀ runs between 6 and 25 µg/m³ (median 15.5) and PM₂.₅ between 4 and 8 µg/m³ (median 6). SO₂ remains near background levels, from 0.1 to 2.9 µg/m³ with a median of 1.5 µg/m³. The data therefore capture a broad spread for gases but only modest concentrations for particulates, and the uneven freshness across pollutants should be kept in mind when interpreting the current air quality picture for Alfaro.

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 Alfaro includes four valid measurements and was refreshed recently, having been updated within three days (last update: 2026‑02‑09T03:00:00+00:00). These values represent a snapshot of conditions at the time of collection; air quality can differ across neighborhoods and change throughout the day, so this information may not reflect the exact situation at any specific location or moment.

OpenAQ station rows