{ "snapshot_id": "approved-static-48d32b636f07abc8", "page_version": "46665dd0ad6aebb42e75993acfb06ecb", "content_date": "2026-10-16", "schema_version": "immigrationdb-report-dataset-v1", "generated_at": "2026-10-25", "citation": { "@type": "CreativeWork", "@id": "https://immigrationdb.com/reports/switzerland-cities-with-cleanest-air/#citation", "schema_version": "immigrationdb-citation-v1", "citation_type": "ImmigrationDB compilation", "canonical_url": "https://immigrationdb.com/reports/switzerland-cities-with-cleanest-air/", "title": "Cities with cleanest air in Switzerland", "author": { "name": "ImmigrationDB", "url": "https://immigrationdb.com/" }, "publisher": { "name": "ImmigrationDB", "url": "https://immigrationdb.com/" }, "snapshot_id": "approved-static-48d32b636f07abc8", "version": "46665dd0ad6aebb42e75993acfb06ecb", "retrieval_date": "2026-10-16", "build_date": "2026-10-16", "compilation_license": { "name": "CC BY 4.0", "url": "https://creativecommons.org/licenses/by/4.0/", "terms_url": "https://immigrationdb.com/about/copyright/" }, "formats": { "apa": "ImmigrationDB. (2026, October 16). Cities with cleanest air in Switzerland [ImmigrationDB compilation; version 46665dd0ad6aebb42e75993acfb06ecb]. ImmigrationDB. https://immigrationdb.com/reports/switzerland-cities-with-cleanest-air/ Retrieved 2026-10-16. Compilation license: CC BY 4.0, https://creativecommons.org/licenses/by/4.0/", "bibtex": "@misc{immigrationdb_immigrationdb_cities-with-cleanest-air-in-switzerland_ae9d28edf0be,\n author = {ImmigrationDB},\n title = {Cities with cleanest air in Switzerland},\n publisher = {ImmigrationDB},\n year = {2026},\n date = {2026-10-16},\n version = {46665dd0ad6aebb42e75993acfb06ecb},\n url = {https://immigrationdb.com/reports/switzerland-cities-with-cleanest-air/},\n note = {Retrieved 2026-10-16. ImmigrationDB compilation. Compilation license: CC BY 4.0, https://creativecommons.org/licenses/by/4.0/},\n}", "markdown": "[Cities with cleanest air in Switzerland](https://immigrationdb.com/reports/switzerland-cities-with-cleanest-air/) — ImmigrationDB; ImmigrationDB; version 46665dd0ad6aebb42e75993acfb06ecb; retrieved 2026-10-16; built 2026-10-16." }, "boundary_note": "This citation identifies the ImmigrationDB compilation/page. Underlying source publishers and datasets retain their own terms; inspect the Sources section and cite those records separately." }, "underlying_source_references": [ { "source_id": "source-65f1aa1d0468", "source_url": "https://discomap.eea.europa.eu/App/AQViewer/download?f=csv&fqn=Airquality_Dissem.b2g.AirQualityStatistics", "source_title": "Annual AQ statistics (AirBase & e-Reporting merged)", "publisher": "European Environment Agency (EEA)", "source_quality": "verified", "last_checked": "2026-09-23" }, { "source_id": "source-793012c42cd2", "source_url": "https://www.bafu.admin.ch/dam/de/sd-web/wl28-y2TXfSG/Partikelmessungen-NABEL-2024.pdf", "source_title": "Swiss Federal Office for the Environment (FOEN/BAFU) and Empa NABEL", "publisher": "Swiss Federal Office for the Environment (FOEN/BAFU) and Empa NABEL", "source_quality": "verified", "last_checked": "2026-08-04" }, { "source_id": "source-c7116ccade2d", "source_url": "https://discodata.eea.europa.eu/sql?query=select+%2A+from+%5BAirQualityDataFlows%5D.%5Blatest%5D.%5BAirQualityStatistics%5D+where+component_code+%3D+6001+and+CountryCode+%3D+%27CH%27+and+DataAggregationProcessId+%3D+%27P1Y%27+and+YearOfStatistics+in+%282022%2C+2023%2C+2024%29&p=1&nrOfHits=1000&result=json", "source_title": "EEA Air Quality Statistics — PM2.5 annual mean", "publisher": "European Environment Agency", "source_quality": "verified", "last_checked": "2026-10-07" }, { "source_id": "source-783d5e8f6b69", "source_url": "https://cdn.who.int/media/docs/default-source/air-pollution-documents/air-quality-and-health/who_ambient_air_quality_database_version_2024_%28v6.1%29.xlsx?download=true&sfvrsn=c504c0cd_3", "source_title": "cdn.who.int", "publisher": "cdn.who.int", "source_quality": "verified", "last_checked": "2026-08-26" } ], "report": { "schema_version": "immigrationdb-generated-report-v1", "canonical_slug": "switzerland-cities-with-cleanest-air", "canonical_path": "/reports/switzerland-cities-with-cleanest-air/", "title": "Cities with cleanest air in Switzerland", "question": "Cities with cleanest air in Switzerland", "short_answer": "Baar, Switzerland has the lowest pm2.5 — annual mean of the 30 cities compared: 4.22 µg/m³ (Annual AQ statistics (AirBase & e-Reporting merged), 2024-12-31).", "summary": "Switzerland cities ranked by annual PM2.5 concentration, not by current readings.", "report_type": "data_driven_report", "scope": "city", "status": "accepted", "indexability": "indexable", "population_floor": 20000, "excluded_counts": { "population_floor": 208 }, "not_advice_disclaimer": "This ranking is a source-backed reference. Read the source, geographic grain and observation date before comparing rows.", "methodology_id": "methodology-switzerland-cities-with-cleanest-air-v1", "methodology": { "summary": "Every row is a published pm2.5 — annual mean observation measured in µg/m³, ranked lowest first. The values were observed between 2021 and 2024. A place appears only when it publishes this exact metric, so an absent place means missing data rather than a low value. Only published cities with at least 20,000 residents and city-level observations qualify.", "formula": "air_quality_pm25_annual_ug_m3 asc", "assumptions": [ "Source definitions, geographic grain and observation period remain visible for every row." ], "exclusions": [ "Supplemental sources, null values, incompatible units, rows without direct source URLs, places below the population floor, non-city observations and copied values are excluded." ], "source_policy": "Verified sources with direct URL and visible scope" }, "freshness": { "last_checked": "2026-10-07", "status": "generated_from_current_reusable_facts", "field_dates_visible": true, "verified_at": "2026-10-07" }, "rows": [ { "row_id": "switzerland-cities-with-cleanest-air:city:ch:bfsnr:1701", "label": "Baar, Switzerland", "canonical_path": "/cities/ch/1701-baar/", "country_code": "CH", "population_total": 25004, "value": 4.220967, "value_display": "4.22 µg/m³", "unit": "µg/m³", "geographic_grain": "nearest_station", "source_locator": null, "observation_period": "2024-12-31", "derivation": "identity", "status": "accepted", "metric_id": "air_quality_pm25_annual_ug_m3", "source_quality": "verified", "source_ids": [ "source-65f1aa1d0468" ], "evidence": [ { "source_id": "source-65f1aa1d0468", "url": "https://discomap.eea.europa.eu/App/AQViewer/download?f=csv&fqn=Airquality_Dissem.b2g.AirQualityStatistics", "locator": "air_quality_pm25_annual_ug_m3; 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