Deployment of low-cost air quality sensors in Rouen: A dataset of one year of hourly concentrations of gas pollutants.

Nitrogen dioxide (NO2) is a major pollutant in urban conditions, as it is mostly produced by traffic. To ensure a good health of cities inhabitants, Europe have set some regulations over maximum NO2 concentrations. This article presents a dataset of NO2 concentrations measured by AirSensEUR sensors and monitoring stations in Rouen, (France). Sensors' data consist of measurements of nitrogen oxides (NOx), carbon monoxide (CO), ozone (O3), and meteorological parameters at ten sites in the city of Rouen, France, over a one-year period. Measurements from three reference stations (two in a traffic area and one in a background area) are also provided, so that comparison between devices and calibration in-situ of the network can be investigated. The dataset consists of CSV files providing the hourly-averaged measurements made by the sensor nodes, and the three reference measurements acquired at the same time. It has been designed to assist organization in investigating the feasibility of a sensor network and its benefits to monitor NO2 concentration in cities. The aim is thus to address the challenge of having a dense network of precise measuring devices at their disposal and make air quality information more accessible for the global population.

Air quality low-cost sensors and monitoring stations NO2 raw dataset in Rouen (France).

This article presents a dataset comprising measurements made by co-located devices, with the aim of calibrating sensors for an upcoming in-situ use. The dataset includes hourly averaged data from 9 low-cost sensors and 2 traffic monitoring stations (thereafter named QDP and SUD3) in Rouen spanning from October 20, 2021 to March 25, 2022. In addition, the dataset is enriched by covariates measured by the sensors: temperature, relative humidity, atmospheric pressure, plus Ox and CO measures. The experiment was conducted as part of TIGA's call for project, and designed to have a better understanding of sensors' drawbacks, particularly when they are moved or shut down. Knowledge about the effect of air pollution on health has gained significant attention from both the scientific community and citizens, making air quality a growing issue for urban area. As a result, the city of Rouen in Normandy, France, has prioritized air quality monitoring as a key initiative. Concurrently, several means to measure air pollutants have been made more accessible, such as the use of low-cost sensors. Those sensors offer affordability, but are known to be less accurate than monitoring stations. Thus, they need to be cautiously studied so as to be used properly.