Oslo Marathon 10 for Grete - Pollen and Air Quality Forecast for Today
Pollen
Pollen levels are today low across the route.
Air Quality
Air quality along the route is fair. O3 (25.0/100) is fair. The remaining pollutants stay at good 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 0.0 km after start.
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Environmental Exposure Detail
Oslo Marathon is Norway's biggest marathon and one of Scandinavia's most established, with roots going back to 1981, when New York City Marathon founder Fred Lebow ran it and called it one of the best events he'd taken part in. Relaunched in 2004, it starts and finishes at Oslo's City Hall Square and follows a scenic, largely flat route along the Oslofjord waterfront, with marathoners completing two loops. Along with the marathon and half marathon, it includes the popular 10K "10 for Grete", named in tribute to Norwegian running legend Grete Waitz.
Oslo Marathon 10 for Grete runs through the streets of Oslo, where plane, and birch street trees are the main pollen source along the course, with birch peaking through April and May and grass pollen building through June and July. Air quality along the course is generally good on weekend mornings, though nitrogen dioxide and fine particulate levels can rise on the busier, more built-up stretches through Oslo's centre.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Forecast for 30 August
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 | 1/100 |
| Oak (Quercus) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 1/100 |
| 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 | Fair | 25.0/100 |
| PM2.5 (fine particles) | Good | 2.7/100 |
| PM10 (coarse particles) | Good | 0.9/100 |
| NO2 (nitrogen dioxide) | Good | 11.8/100 |
| O3 (ozone) | Fair | 25.0/100 |
| SO2 (sulfur dioxide) | Good | 1.0/100 |
| CO (carbon monoxide) | Good | 0.0/100 |
| HCHO (formaldehyde) | Good | 2.1/100 |
| PM1 (ultrafine particles) | Good | 2.5/100 |
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Frequently Asked Questions
Where is air quality worst on the Oslo Marathon 10 for Grete route?
Based on today's forecast, O3 is forecast at fair levels along the route today (25.0/100). Air quality is at its worst after 0.0 km into the route. Airmine calculates exposure at 200m intervals along the course using satellite-derived atmospheric data.
Where is pollen highest on the Oslo Marathon 10 for Grete 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 Oslo Marathon 10 for Grete 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 Oslo Marathon 10 for Grete 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 Oslo Marathon 10 for Grete, 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 exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen 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. |