Worst air pollution Huelva, today and tomorrow
Today (20 September): Air quality in Huelva is moderate. AQI and PM2.5 are moderate; PM10 is fair; NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 AM (PM2.5: 40.9/100).
Tomorrow (21 September 2026): Air quality in Huelva is moderate. All pollutants stay as today. Pollution peaks around 11:00 AM (PM2.5: 40.4/100). Airmine updates local air quality forecasts four times daily.
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Huelva's air quality faces Spain's most significant industrial air quality challenge, with the Polo Químico de Huelva petrochemical and phosphate fertiliser complex generating some of Spain's highest industrial SO₂, fluoride, and PM2.5 concentrations alongside the Rio Tinto copper mining legacy. Atlantic westerlies from the Gulf of Cádiz generally provide maritime ventilation, but the industrial complex's scale and the enclosed Odiel-Tinto estuary topography make Huelva consistently Spain's most industrially impacted urban air quality environment throughout the year.
Today - 20 September | Pollution peaks at 10:00
AQI:
Moderate
40.9/100
PM2.5 (fine particles):
Moderate
40.9/100
PM10 (coarse particles):
Fair
25.5/100
NO2 (nitrogen dioxide):
Good
0.8/100
O3 (ozone):
Good
16.6/100
SO2 (sulfur dioxide):
Good
0.4/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
1.2/100
PM1 (ultrafine particles):
Good
12.1/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 11:00
AQI:
Moderate
40.4/100
PM2.5 (fine particles):
Moderate
40.4/100
PM10 (coarse particles):
Fair
22.5/100
NO2 (nitrogen dioxide):
Good
0.5/100
O3 (ozone):
Good
17.5/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.5/100
HCHO (formaldehyde):
Good
1.2/100
PM1 (ultrafine particles):
Good
18.3/100
Pollen forecast in Huelva
View pollen forecastFrequently Asked Questions
Is air quality bad in Huelva right now?
On 20 September 2026, overall air quality in Huelva is moderate. AQI is the main air quality indicator at 40.9/100. Pollution peaks around 10:00 AM (PM2.5: 40.9/100).
Will air quality be worse tomorrow in Huelva?
On 21 September 2026, air quality conditions in Huelva will be similar to today, with AQI forecast at moderate at 40.4/100. Pollution peaks around 11:00 AM (PM2.5: 40.4/100).
When is air pollution at its worst in Huelva?
Does air quality in Huelva vary by season? Air quality is typically at its weakest in December and January, when cold, calm high-pressure spells trap traffic exhaust and wood-smoke close to the ground instead of letting it disperse. Spring is typically a transitional season, as milder, windier weather starts clearing out the pollutants that accumulate during winter's calm spells. Hot, dry summer conditions favour ozone formation, so afternoon readings can rise even when traffic and heating pollution are otherwise low. As autumn progresses, cooler temperatures and more frequent rain tend to bring air quality back toward its yearly average. The region's intense heat and its exposure to Saharan dust crossing the Strait mean conditions here can swing sharply from the seasonal norm.
Are air quality levels in Huelva based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 20 September 2026 at 14:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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