Air quality, city by city (Americas Top 20).
This module summarizes tap-water safety signals for the Top 20 Americas cities on a widely published “Top 100 city destinations” list. It prioritizes municipal / regulator reporting, plus public-health and microbiology context where available.
Cities
Search and sort. Click a city row to jump to its sources.
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| Rank | City | Country | PM2.5 (µg/m³, 24h avg) | Score | Traveler label | Notes & sources |
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PM2.5 is fetched live (no key) from the Open‑Meteo Air Quality API by city coordinates, then averaged over the last 24 hours. Traveler labels use the WHO 2021 24‑hour PM2.5 guideline (15 µg/m³) as the anchor point. Sources: WHO 2021 Global Air Quality Guidelines; Open‑Meteo Air Quality API docs.
Per‑city sources
Primary sources listed per city for auditability.
City selection is based on a published “Top 100 city destinations” list (Euromonitor index reproduced by a public source). If you prefer a different definition of “most visited”, the city list should be regenerated first.