Marquilly, Solène2025-10-092025-10-092025-10-09http://hdl.handle.net/10138/602411This internship thesis, conducted at Octopus Lab, focuses on the assessment of indoor air quality in four buildings located in Saint-Denis, in a context where health and environmental issues related to air pollution are increasingly of concern. The main objective of the study is to measure the concentrations of several pollutants (NO₂, fine particles, CO₂, CO) in different indoor spaces, compare them to current regulations, and assess their potential impact on occupant health. The measurement campaign is based on a rigorous protocol, including the deployment and configuration of connected environmental sensors, as well as the collection and processing of data via the Indalo Supervision platform developed by Octopus Lab. The data collected made it possible to compare indoor and outdoor pollution levels, identify certain at-risk areas, and suggest areas for improvement, particularly in terms of ventilation and air quality monitoring. This mission allowed me to strengthen my technical skills in data analysis and scientific rigor, while raising my awareness of the concrete public health issues linked to indoor air quality.engIn Copyright 1.0air qualityindoor airmeasurementair pollutionhealthURN:NBN:fi:hulib-202510094377pro gradu -tutkielmaAdvanced Spectroscopy in ChemistryAdvanced Spectroscopy in ChemistryAdvanced Spectroscopy in ChemistryKemian ja molekyylitieteiden maisteriohjelmaMaster's Programme in Chemistry and Molecular SciencesMagisterprogrammet i kemi och molekylära vetenskaper