Air Quality in Saint-Denis
Ile-de-France — 93
113,118 inhabitants
56 of 60 cities
Standard deviation: ±12 points
Based on 60 measurements
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Air quality in Saint-Denis: what you need to know
Saint-Denis, located in the Ile-de-France region, presents average air quality with an average ImmoGrade of 55/100. Like most French cities of comparable size, the main pollution sources are road traffic and residential heating. Air quality varies by neighborhood, with better scores in residential areas near green spaces and away from major roads. Local sustainable mobility policies and public transport investments are gradually improving air quality. ImmoGrade data provides a precise score at 500-meter resolution for each address, revealing often unknown disparities between different city neighborhoods. Whether you are a buyer or seller, knowing the air quality at your exact address is an asset for your real estate transactions.
Main pollutants in Saint-Denis
Main pollutants: NO2, PM2.5, PM10
Nitrogen dioxide (NO2) from road traffic and fine particles (PM2.5, PM10) are the main pollutants in Saint-Denis. Levels vary based on proximity to roads and weather conditions. WHO guidelines serve as the reference for evaluating air quality.
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.
SO2 — 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 Saint-Denis
Air quality varies significantly between neighborhoods. With a standard deviation of ±12 points, two addresses in Saint-Denis can show very different scores. Only an address-level report reveals the actual air quality.
Impact on real estate in Saint-Denis
In Saint-Denis, air quality is an increasingly important factor in real estate decisions. Properties near green spaces and away from major roads generally benefit from better scores and higher valuations. An ImmoGrade report included in a listing file objectively highlights the property's environmental quality and differentiates from the competition.
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 Ile-de-France
Frequently asked questions about air quality in Saint-Denis
What is the air quality in Saint-Denis?
The average ImmoGrade for Saint-Denis is 55/100. This score varies by neighborhood. Enter your exact address to get a precise score at 500-meter resolution.
How can I get an air quality report for an address in Saint-Denis?
Enter the address in the search bar above. The ImmoGrade report is generated in 3 seconds with a score /100, breakdown of 6 pollutants, and local comparison.
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