Air Quality in Grenoble
Auvergne-Rhone-Alpes — 38
158,198 inhabitants
51 of 60 cities
Standard deviation: ±11 points
Based on 200 measurements
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Air quality in Grenoble: what you need to know
Grenoble, nicknamed the "Capital of the Alps," is situated in a basin surrounded by mountains that trap atmospheric pollutants. This unique geographical configuration creates frequent winter pollution episodes when thermal inversions prevent pollutant dispersion. Road traffic, wood-burning heating, and industrial activity are the main pollution sources. The city is investing in public transport and a Low Emission Zone to improve the situation. Mountain-edge neighborhoods (Bastille, Chartreuse) are better ventilated than the basin floor. The average score of 57/100 is among the lowest of major cities, directly linked to geography.
Main pollutants in Grenoble
Main pollutants: PM2.5, PM10, NO2, O3
Fine particles PM2.5 and PM10, from wood-burning heating and traffic, are Grenoble's main problem. The Alpine basin traps these pollutants in winter. Traffic NO2 and summer ozone complete this unfavorable profile. WHO threshold exceedances are frequent in winter.
PM2.5 — Fine Particulate Matter
Particles smaller than 2.5 micrometers. From traffic and heating. Penetrate deep into the lungs.
Key pollutantPM10 — Coarse Particulate Matter
Particles smaller than 10 micrometers. From traffic, construction, and erosion. Irritating to airways.
Key pollutantNO2 — Nitrogen Dioxide
Gas mainly from diesel engine combustion. Direct indicator of road traffic. Respiratory irritant.
Key pollutantO3 — Ozone
Secondary pollutant formed by chemical reaction under sunlight. Peaks in summer. Causes respiratory irritation.
Key pollutantSO2 — Sulfur Dioxide
From combustion of sulfur-containing fossil fuels. Found near industrial and port areas.
CO — Carbon Monoxide
Odorless gas from incomplete combustion. Linked to road traffic and faulty heating systems.
Neighborhood comparison in Grenoble
Air quality varies significantly between neighborhoods. With a standard deviation of ±11 points, two addresses in Grenoble can show very different scores. Only an address-level report reveals the actual air quality.
Impact on real estate in Grenoble
In Grenoble, air quality is a major real estate concern. Elevated or mountain-edge properties benefit from significantly higher scores and sell at a premium. The basin floor, more polluted, sees lower prices. An ImmoGrade report is an essential tool for Grenoble agents wanting to objectively demonstrate these differences.
Health tips related to air quality
Check the ImmoGrade for your address before buying or renting a property.
Sensitive individuals (children, elderly, asthma sufferers) should be particularly cautious in areas scoring below 50/100.
Choose homes away from major roads and near green spaces for better indoor air quality.
Ventilate your home early in the morning or late in the evening, when pollution levels are lowest.
National Ranking — Top 5
| # | City | Score |
|---|---|---|
| 1 | Brest | 82/100 |
| 2 | Lorient | 78/100 |
| 3 | La Rochelle | 77/100 |
| 4 | Bayonne | 76/100 |
| 5 | Ajaccio | 75/100 |
Air Quality in Auvergne-Rhone-Alpes
Frequently asked questions about air quality in Grenoble
Why is Grenoble so polluted?
The Alpine basin surrounded by mountains traps pollutants, especially in winter during thermal inversions. Wood-burning heating and traffic worsen the problem. Elevated neighborhoods nevertheless offer better scores (up to 70/100).
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