Polygon representing the 3-30-300 Rule, i.e. seeing 3 trees near your home, moving to neighborhoods where 30% of the space is covered by trees and living less than 300 meters from a green space. This nature-based approach aims to create greener and more resilient cities. It was developed by the Dutch researcher [Cecil Konijnendijk] (https://www.researchgate.net/publication/353571108_The_3-30-300_Rule_for_Urban_Forestry_and_Greener_Cities) working in the fields of forestry and urban ecology. These layers are used for the planning of plantations in vulnerable sectors with the target of 500,000 trees to be planted by the City and its partners, as part of the 2020-2030 Climate Plan. They also help to better plan and prioritize greening projects. The data can also be consulted on the interactive map of vulnerabilities to climate change in the Montreal agglomeration. https://experience.arcgis.com/experience/944e0b7104bd491591ccca829da24670/page/Page/**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Data from the QUALO program, shoreline water quality from the Aquatic Environment Monitoring Network. An [interactive map] (https://experience.arcgis.com/experience/38d7c7bb43da4e2082aa836689d0d318/) is also available.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Geographic areas of the air quality monitoring network (RSQA). Each [RSQA station] (rsqa-station-list) is assigned to a unique sector.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

RUISSO program sampling points, stream water quality, Aquatic environment monitoring network.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

SAMPLING POINTS FOR THE QUALO program, shoreline water quality of the aquatic environment monitoring network.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Rate of mineralization and vegetation of surfaces in the territory of the agglomeration of Montreal represented by polygons and based on the data [Mineral and vegetable surfaces of 2016] (https://donnees.montreal.ca/dataset/surfaces-minerales-vegetales) from the Geomatics Division of the City of Montreal. The data was calculated at the district level and at the level of the distribution islands of Statistics Canada. The data can also be consulted on the [interactive climate change vulnerability map] (https://experience.arcgis.com/experience/944e0b7104bd491591ccca829da24670/page/Page/).**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Polygons representing heat islands on the ground surface. A heat island is defined as the difference in temperatures observed between two surrounding environments at the same time. The different temperature differences are mainly explained by the type of soil layout such as the vegetation cover, the impermeability of the materials and the thermal properties of the materials. This difference can reach more than 12°C. The 2020-2030 Montreal Climate Plan aims, among other things, to improve urban planning and regulatory tools. Montréal has thus committed to updating the climate change vulnerability analysis, including the heat island map, carried out as part of the 2015-2020 Agglomération de Montréal Climate Change Adaptation Plan and to integrating it into the next urban and mobility plan. The urban heat island maps were produced in collaboration with the Department of Geography of the University of Quebec in Montreal (UQAM). The data can also be viewed on the [interactive heat island map] (https://bter.maps.arcgis.com/apps/webappviewer/index.html?id=157cde446d8942d7b4367e2159942e05).**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Stations for measuring the impact of greening projects on air temperature and humidity. Fifteen stations were installed across the City of Montreal for a period of 10 summers in order to study the impact of urban development on heat. In the long term, the City wishes to install 25 throughout its territory. Better understanding these phenomena is an essential step in order to be able to address the problem of extreme heat in urban areas, which have an impact on the health and well-being of citizens. With this project, the City intends to measure the impact of greening projects on air temperature, train and raise awareness among its staff by participating in a research/action project and raise public awareness of the impact of greening on air temperature.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Data from the RUISSO program, bacteriological and physicochemical quality of streams and inland water bodies in the Montreal agglomeration, from the Aquatic Environment Monitoring Network. An [interactive map] (https://experience.arcgis.com/experience/38d7c7bb43da4e2082aa836689d0d318/) is also available.**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

As part of special projects, the Air Quality Monitoring Network (RSQA) measures the concentrations of pollutants at the nomadic station. Its objective is to deepen our knowledge of ambient air quality. As its name indicates, this station will change location at the end of each measurement campaign, which may last from 12 to 24 months. The Nomad station continuously measures: ozone (O3), fine particles (PM2.5), carbon monoxide (CO), sulfur dioxide (SO2), nitrogen oxides (NOx), elemental carbon (CE) and ultrafine particles (PUF); as well as spot measurements of breathable particles (PM10) and total suspended particles (PST) with metal analysis on the latter. **This third party metadata element was translated using an automated translation tool (Amazon Translate).**