Air quality in San Nicolás del Puerto, Andalusia, Spain today
Mr. Duck’s Air Quality Score
Good air today for San Nicolás del Puerto, Andalusia, Spain
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 San Nicolás del Puerto is classified as Good. The main pollutant identified is PM2.5, with a measured reference value of 3.36 µg/m³. Data are shown via OpenAQ and are based on five valid measurements.
PM10 also has a reference value recorded at 5.0 µg/m³. 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 San Nicolás del Puerto includes six measured pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter 10 µm or less (PM₁₀), particulate matter 2.5 µm or less (PM₂.₅) and sulphur dioxide (SO₂). All of these values come from a single monitoring location identified as SIERRA NORTE, so the station coverage for the city is limited to one site that records each pollutant on its own row.
The timestamps show mixed freshness. The NO reading is dated 2024‑02‑21 00:00 UTC, which makes it older than two years, while the remaining five pollutants were last updated between 2026‑02‑09 01:00 UTC and 2026‑02‑09 03:00 UTC – all within the past week. This means that for most contaminants the data reflects very recent conditions, but the nitrogen monoxide value is considerably outdated.
Across the six rows the reported concentrations are single-point figures with no observed variation: NO and NO₂ each sit at 2.0 µg/m³, O₃ at 81.0 µg/m³, PM₁₀ at 5.0 µg/m³, PM₂.₅ at 3.36 µg/m³ and SO₂ at 4.0 µg/m³. Because each pollutant has identical minimum, median and maximum values, the dataset does not provide a range or spread for any of them. Consequently, while the recent updates give a snapshot of current air quality at SIERRA NORTE, the limited number of stations and the lack of variability mean that conditions elsewhere in San Nicolás del Puerto may differ from what is shown here.
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 del Puerto is based on five valid measurements and was refreshed recently, being Updated within 3 days (last update: 2026‑02‑09T03:00:00+00:00). This snapshot reflects conditions at the time of collection; air quality can vary by location and time within the city, so values may differ across neighborhoods or later in the day.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| SIERRA NORTE | no | 2.0 | µg/m³ | 2024-02-21 00:00 UTC |
| SIERRA NORTE | no2 | 2.0 | µg/m³ | 2026-02-09 03:00 UTC |
| SIERRA NORTE | o3 | 81.0 | µg/m³ | 2026-02-09 03:00 UTC |
| SIERRA NORTE | pm10 | 5.0 | µg/m³ | 2026-02-09 01:00 UTC |
| SIERRA NORTE | pm25 | 3.36 | µg/m³ | 2026-02-09 03:00 UTC |
| SIERRA NORTE | so2 | 4.0 | µg/m³ | 2026-02-09 03:00 UTC |