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        <gco:CharacterString>The National Air Pollution Surveillance (NAPS) Program is Canada’s main source of outdoor air quality data. Established in 1969, the Program now collects and reports ambient air pollution data from almost 280 monitoring stations across Canada. These stations are located in both cities and rural areas. All data are stored in the Canada-Wide Air Quality Database (CWAQD). 

The NAPS Program is managed by Environment and Climate Change Canada (ECCC) in collaboration and cooperation with provincial, territorial, and regional government monitoring networks. NAPS data support a wide range of national and international initiatives, including the Air Quality Health Index (AQHI), the Canadian Environmental Sustainability Indicators (CESI), the World Health Organization (WHO) Air Quality Database and the Canada-United States Air Quality Agreement (AQA). 
 
Data products and information about the NAPS Program are available in the "Data and Resources" section of this page. The ECCC Data Catalogue provides pre-generated air quality data files. The NAPS Data Query Tool allows users to perform custom data searches for select datasets. 

For additional information, please contact the NAPS Inquiry Centre at RNSPA-NAPSINFO@ec.gc.ca.</gco:CharacterString>
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            <gmd:LocalisedCharacterString locale="#fra">Le Programme de surveillance national de la pollution atmosphérique (SNPA) est la principale source de données sur la qualité de l'air ambient au Canada. Créé en 1969, le Programme recueille et publie maintenant des données sur la pollution atmosphérique ambiante provenant de près de 280 stations de surveillance réparties dans tout le Canada. Ces stations sont situées aussi bien dans les villes que dans les zones rurales. Toutes les données sont stockées dans la base de données pancanadienne sur la qualité de l’air (BDPQA). 

Le Programme SNPA est géré par Environnement et Changement climatique Canada (ECCC) en collaboration et coopération avec les réseaux de surveillance des gouvernements provinciaux, territoriaux et régionaux. Les données du SNPA soutiennent un large éventail d'initiatives nationales et internationales, notamment la Cote air santé (CAS), les Indicateurs canadiens de la durabilité de l’environnement (ICDE), la base de données sur la qualité de l'air de l'Organisation mondiale de la santé (OMS) et l'Accord Canada-États-Unis sur la qualité de l'air (AQA). 

Les produits de données et les informations sur le Programme SNPA sont disponibles dans la section « Données et ressources » de cette page. Le catalogue de données d'ECCC fournit des fichiers de données sur la qualité de l'air pré-générés. L'outil de recherche de données SNPA permet aux utilisateurs d'effectuer des recherches personnalisées pour certains ensembles de données. 

Pour plus d'informations, veuillez contacter le centre d'information SNPA à l'adresse RNSPA-NAPSINFO@ec.gc.ca</gmd:LocalisedCharacterString>
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                <gmd:CI_OnlineResource>
                  <gmd:linkage>
                    <gmd:URL>ttps://www.canada.ca/en/environment-climate-change/services/air-pollution/monitoring-networks-data/national-air-pollution-program.html</gmd:URL>
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      <gmd:resourceMaintenance>
        <gmd:MD_MaintenanceInformation>
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            <gmd:MD_MaintenanceFrequencyCode codeList="https://schemas.metadata.geo.ca/register/napMetadataRegister.xml#IC_102" codeListValue="RI_540">asNeeded; auBesoin</gmd:MD_MaintenanceFrequencyCode>
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        <gmd:MD_Keywords>
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          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>ozone</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#fra">ozone</gmd:LocalisedCharacterString>
              </gmd:textGroup>
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          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
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                <gmd:LocalisedCharacterString locale="#fra">smog</gmd:LocalisedCharacterString>
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          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
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          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
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          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
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          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
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          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
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          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
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            <gco:CharacterString>PM2.5</gco:CharacterString>
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            <gco:CharacterString>PM10</gco:CharacterString>
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            <gco:CharacterString>CO</gco:CharacterString>
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            <gco:CharacterString>SO2</gco:CharacterString>
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          <gmd:keyword xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>O3</gco:CharacterString>
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            <gco:CharacterString>Air - Quality</gco:CharacterString>
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              <gmd:date>
                <gmd:CI_Date>
                  <gmd:date>
                    <gco:Date>2020-06-26</gco:Date>
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                    <gmd:CI_DateTypeCode codeListValue="RI_366" codeList="https://schemas.metadata.geo.ca/register/napMetadataRegister.xml#IC_87">creation;création</gmd:CI_DateTypeCode>
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                  <gmd:code>
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                  </gmd:code>
                </gmd:MD_Identifier>
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              <gmd:citedResponsibleParty>
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                  <gmd:organisationName xsi:type="gmd:PT_FreeText_PropertyType">
                    <gco:CharacterString>Unknown</gco:CharacterString>
                    <gmd:PT_FreeText>
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                        <gmd:LocalisedCharacterString locale="#fra">Unknown</gmd:LocalisedCharacterString>
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                    </gmd:PT_FreeText>
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                  <gmd:role>
                    <gmd:CI_RoleCode codeListValue="RI_409" codeList="https://schemas.metadata.geo.ca/register/napMetadataRegister.xml#IC_90">custodian; conservateur</gmd:CI_RoleCode>
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            <gco:CharacterString>Air</gco:CharacterString>
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        <gco:CharacterString>Monitoring Program Overview:

The NAPS Program is comprised of both continuous and (time-) integrated measurements of key air pollutants. Continuous data are collected using gas analyzers and particulate monitors, with data reported every hour of the year, and are available as hourly concentrations or annual averages. Integrated samples, collected at select sites, are analyzed at the NAPS laboratory in Ottawa for additional pollutants, and are typically collected for a 24-hour period once every three or six days, on various sampling media such as filters, canisters, and cartridges. 

Continuous Monitoring:

Air pollutants monitored continuously include the following chemical species:
• carbon monoxide (CO) 
• nitrogen dioxide (NO2) 
• nitric oxide (NO) 
• nitrogen oxides (NOX) 
• ozone (O3) 
• sulphur dioxide (SO2) 
• particulate matter less than or equal to 2.5 micrometres (PM2.5) and 10 micrometres (PM10) 

Each provincial, territorial, and regional government monitoring network is responsible for collecting continuous data within their jurisdiction and ensuring that the data are quality-assured as specified in the NAPS Ambient Air Monitoring and Quality Assurance/Quality Control Guidelines. The hourly air pollutant concentrations are reported as hour-ending averages in local standard time with no adjustment for daylight savings time. These datasets are posted on an annual basis. 

Integrated Monitoring:

Categories of chemical species for a subset of sites sampled on a time-integrated basis include: 
• particulate composition (e.g., metals, ions), with additional detailed speciation at Tier 1 core sites such as organic and elemental carbon, ammonia and biomass burning markers; 
• semi-volatile organic compounds (e.g., polycyclic aromatic hydrocarbons such as benzo[a]pyrene); 
• volatile organic compounds (e.g., benzene) 

The 24-hour air pollutant samples are collected from midnight to midnight. These datasets are generally posted on a quarterly basis for data available at that time. 

Data Disclaimer:

NAPS data are reviewed and updated regularly. The data shown reflect the most current information available in the CWAQD at the time they are published. The types of pollutants measured, as well as how often samples are collected, can differ from one monitoring site to another. 

When data files are updated in the ECCC Data Catalogue, the new version replaces the older one but keeps the same file name and location. The 'DataDonnees’ directory contains continuous and integrated air quality data, organized by sampling year and measurement type, for all data stored in the CWAQD. More details about the NAPS program can be found in the ‘ProgramInformation-InformationProgramme’ folder, with detailed descriptions on recent updates in file ‘NAPS-SNPA_Modification.txt’ 

Citations:

National Air Pollution Surveillance Program, (year accessed). Available from the Government of Canada Open Data Portal at open.canada.ca.</gco:CharacterString>
        <gmd:PT_FreeText>
          <gmd:textGroup>
            <gmd:LocalisedCharacterString locale="#fra">Aperçu du Programme:

Le Programme SNPA comprend des mesures à la fois continues et ponctuels (dans le temps) des principaux polluants atmosphériques. Les données provenant des mesures continues sont recueillies avec des analyseurs de gaz et des instruments de mesure des particules. Ces données sont recueillies chaque heure de l’année et sont exprimées en concentrations horaires ou en moyennes annuelles. Les échantillons ponctuels, qui proviennent de certains sites seulement, sont traités au laboratoire du Programme SNPA situé à Ottawa pour l’analyse d’autres polluants et sont habituellement recueillis pendant une période de 24 heures tous les trois ou six jours sur divers supports d’échantillonnage, comme des filtres, des bonbonnes et des cartouches. 

Surveillance continue:

Les polluants atmosphériques qui font l’objet d’une surveillance continue comprennent les espèces chimiques suivantes : 
• le monoxyde de carbone (CO) 
• le dioxyde d’azote (NO2) 
• le monoxyde d’azote (NO) 
• les oxydes d’azote (NOX) 
• l’ozone (O3) 
• le dioxyde de soufre (SO2) 
• les particules de diamètre inférieur ou égal à 2,5 micromètres (PM2,5) et 10 micromètres (PM10) 

Chaque réseau de surveillance provincial, territorial et régional est responsable de recueillir des données continues au sein de son territoire et d’en assurer la qualité conformément aux Lignes directrices du SNPA sur la surveillance de l’air ambiant, l’assurance et le contrôle de la qualité. Les concentrations horaires de polluants atmosphériques sont exprimées en moyennes à la fin de l’heure, en heure locale normale – sans ajustement pour l’heure avancée. Ces ensembles de données sont publiés annuellement. 

Surveillance ponctuelle:

Les catégories d’espèces chimiques pour un sous-ensemble de sites qui font l’objet d’un échantillonnage ponctuel dans le temps comprennent : 
• la composition des particules ( p. ex. métaux, ions), avec une spéciation détaillée supplémentaire sur les sites principaux de niveau 1 tels que le carbone organique, le carbone élémentaire, l’ammoniac et les marqueurs de combustion de la biomasse; 
• les composés organiques semi-volatils (p. ex. les hydrocarbures aromatiques polycycliques comme le benzo[a]pyrène); 
• les composés organiques volatils (p. ex. benzène) 

La collecte sur 24 h des échantillons de polluants atmosphériques a lieu de minuit à minuit. Ces ensembles de données sont généralement publiés sur une base trimestrielle pour les données disponible à ce moment-là. 

Avis concernant les données:

Les données du SNPA sont régulièrement révisées et mises à jour. Les données présentées reflètent les informations les plus récentes disponibles dans la BDPQA au moment de leur publication. Les types de polluants mesurés, ainsi que la fréquence des prélèvements, peuvent varier d'un site de surveillance à l'autre. 

Lorsque les fichiers de données sont mis à jour dans le catalogue de données d'ECCC, la nouvelle version remplace l'ancienne, mais conserve le même nom de fichier et le même emplacement. Le répertoire « Data Donnees » contient des données continues et intégrées sur la qualité de l'air, classées par année d'échantillonnage et type de mesure, pour toutes les données stockées dans le BDPQA. Vous trouverez plus de détails sur le programme SNPA dans le dossier « ProgramInformation-InformationProgramme », avec des descriptions détaillées des dernières mises à jour dans le fichier « NAPS-SNPA_Modification.txt ». 

Citations:

Programme de surveillance national de la pollution atmosphérique (année de consultation). Accessible depuis le Portail dedonnées ouvertes du gouvernement du Canada.</gmd:LocalisedCharacterString>
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