Measured air quality at Châtelet station - 2013 to 2020

RATP continuously monitors and assesses the quality of the air circulating in underground railway enclosures. Monitoring is based primarily on compliance with the hygiene and cleanliness conditions of the RATP spaces, both for passengers and staff. The RATP laboratory carries out continuous measurements at 5 stations representative of the RATP underground spaces (Châtelet, Franklin Roosevelt and Auber, Châtelet RER A and Nation RER A) which constitute the SQUALES network (Surveillance de la Qualité de l'Air de l'Environnement Souterrain). This dataset corresponds to the Châtelet station on line 4. The measurements concern the usual climatic parameters (temperature, relative humidity), air renewal (carbon dioxide) and air quality (nitrogen oxides, particles). This network automatically produces more than 200,000 raw data per year. The hourly averages of these measurements constitute the published database. Other parameters, such as ultrafine particles, aldehydes, monocyclic or polycyclic aromatic hydrocarbons, can also be monitored through ad hoc measurement campaigns.巴黎大众运输公司（RATP）持续监测并评估地铁封闭空间内的空气品质。本次监测以符合RATP运营空间的卫生与洁净要求为核心依据，覆盖乘客与运营人员两类群体。 RATP实验室在5个具有代表性的地铁运营站点开展连续监测工作，这5个站点分别为夏特雷（Châtelet）、富兰克林·罗斯福（Franklin Roosevelt）、欧贝（Auber）、夏特雷快铁A线（Châtelet RER A）以及民族广场快铁A线（Nation RER A），由此搭建了SQUALES监测网络（法语全称为Surveillance de la Qualité de l'Air de l'Environnement Souterrain，意为地下环境空气品质监测）。 本数据集对应4号线夏特雷（Châtelet）站点。 本次监测指标涵盖常规气候参数（温度、相对湿度）、空气更新相关指标（以二氧化碳浓度表征）以及空气品质指标（氮氧化物、颗粒物）。 该监测网络每年可自动生成超20万条原始数据，上述监测项的小时平均值构成了对外发布的数据库。此外，针对超细颗粒物、醛类物质、单环或多环芳烃等其他参数，也可通过专项监测行动开展针对性监测。