Holmenkollstafetten - Pollen and Air Quality Forecast for Today
Pollen Today
Pollen levels are today low across the route.
Air Quality Today
Air quality along the route is good, with all pollutants at low levels. Based on Airmine's forecast, which uses satellite data to calculate exposure every 200 metres along the route, air quality is at its worst 14.9 km after start.
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Environmental Exposure Detail
Holmenkollstafetten is an 18-kilometer relay race through the heart of Oslo's western districts. It combines competitive spirit, team pride, and pure fun — bringing together serious athletes and casual runners alike for what's known as 'the most beautiful adventure of spring' ('Vårens vakreste eventyr').
Birch and other tree pollen levels are typically high at this time of year, and pollen exposure risk varies along the route depending on local vegetation, race-day weather, and temperature. Through the park areas, pollen exposure may be higher, while along the urban streets, vehicle exhaust could be the bigger air quality factor. The local Airmine forecast along the route shows expected pollen and air quality exposure every 200 meters. This can help you prepare for your run and choose the right relay leg that's best for your health and performance. Push limits, not lungs!
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Local pollen and air quality forecasts, interactive pollen maps and route profiles
Features and forecast availability vary by region.
Forecast for 20 September
Pollen Forecast
| Pollen species | Level | Value |
|---|---|---|
| Acacia (Acacia) | None | 0/100 |
| Alder (Alnus) | None | 0/100 |
| Birch (Betula) | None | 0/100 |
| Hazel (Corylus) | None | 0/100 |
| Cypress (Cupressaceae) | None | 0/100 |
| Eucalyptus (Myrtaceae) | None | 0/100 |
| Grass (Poaceae) | None | 0/100 |
| Oak (Quercus) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Mulberry (Morus) | None | 0/100 |
| Plane (Platanus) | None | 0/100 |
| Nettle (Urtica) | None | 0/100 |
| Ragweed (Ambrosia) | None | 0/100 |
| Goosefoot (Amaranthaceae) | None | 0/100 |
Air Quality Forecast
| Pollutant | Level | Value |
|---|---|---|
| AQI | Good | 15.8/100 |
| PM2.5 (fine particles) | Good | 0.8/100 |
| PM10 (coarse particles) | Good | 0.5/100 |
| NO2 (nitrogen dioxide) | Good | 4.0/100 |
| O3 (ozone) | Good | 15.8/100 |
| SO2 (sulfur dioxide) | Good | 0.2/100 |
| CO (carbon monoxide) | Good | 0.6/100 |
| HCHO (formaldehyde) | Good | 0.7/100 |
| PM1 (ultrafine particles) | Good | 1.0/100 |
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Frequently Asked Questions
Where is air quality worst on the Holmenkollstafetten route?
Based on today's forecast, O3 is forecast at good levels along the route today (15.8/100). Air quality is at its worst after 14.9 km into the route. Airmine calculates exposure at 200m intervals along the course using satellite-derived atmospheric data.
Where is pollen highest on the Holmenkollstafetten course?
Pollen levels are relatively low across the entire route today. This changes through the season as different pollen species become active.
When is pollen worst during the Holmenkollstafetten season?
Pollen seasons vary by location. Tree pollen (birch, alder) typically peaks in spring, while grass pollen rises in May-June.
How often is this forecast updated?
Updated four times daily. See the timestamp below for the most recent update.
Are pollen levels in Holmenkollstafetten based on measurements or forecasts?
Pollen data is often misunderstood. Most "pollen levels" are not real-time measurements, but forecasts.
Direct pollen measurements are typically delayed by 1-2 days because they require manual analysis. To show current conditions in Holmenkollstafetten, modern forecasts combine recent measurements, weather data, and information about local vegetation.
This allows us to estimate pollen levels for today and the coming days, not just report the past.
Airmine’s atmospheric monitoring platform was developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team, using satellite and Earth observation technologies to improve emissions monitoring.
Understanding the Scale
The 0–100 scores represent risk levels, not direct measurements of pollen or air pollutant concentrations. Higher scores indicate higher risk. Pollen and air quality use different thresholds.
Pollen
| None | 0 | No or negligible risk of exposure. Pollen/mold exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen or mold spores may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen/mold exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen/mold exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen/mold exposure is expected to be at or near its highest levels. |
Air Quality
| Good | 0-20 | Low air quality risk. Air quality is expected to be good, with low levels of pollution. |
| Fair | 20-40 | Generally low air quality risk. Air quality is expected to be acceptable, with some pollution present. |
| Moderate | 40-60 | Moderate air quality risk. Air pollution is elevated and air quality may be less favorable. |
| Poor | 60-80 | High air quality risk. Air pollution is high and air quality is expected to be poor. |
| Very Poor | 80-100 | Very high air quality risk. Air pollution is very high and air quality is expected to be very poor. |