SmogRank / History / City race
Cities in Portugal, worst air first, day by day
Each measured city's average over the 30 days to every day since January 2023, worst first. Find your own city to follow it through the race, or keep to one country.
The worst cities in Portugal for PM2.5 over the 30 days to 20 Jan 2024: Amora 17.2 µg/m³, Cacém 14.5 µg/m³ and Paredes 14.4 µg/m³.
- 1AmoraSetúbal17.2
- 2CacémLisbon14.5
- 3ParedesPorto14.4
- 4FreamundePorto14.4
- 5LisbonLisbon12.5
- 6Vieira de LeiriaLeiria11.4
- 7Santo AndréSetúbal10.0
- 8LourinhãLisbon8.6
- 9CorroiosSetúbal8.2
- 10HortaAzores7.0
- 11RiachosSantarém5.4
- 12Santiago do CacémSetúbal3.9
- 13FunchalMadeira3.9
- 14FaroFaro3.9
- 15SinesSetúbal3.3
- 16Vila RealVila Real1.5
- 17SantanaMadeira1.4
Not counted on this day, too few days measured: Beduido since 29 Dec 2023 and Ponte de Lima since 29 Nov 2023.
Cities counted each day
A city's number is its average over the 30 days, shown only when 21 of them were measured (5 of 7 on the 7-day race), the same minimum as the 30- and 7-day boards. A city whose monitors go quiet fades out where it stood rather than sliding down, so a gap never reads as cleaner air. Some large countries are thin or missing because their monitors' licences don't allow reuse. How we rank.
Not covered: the government monitoring networks of China and Turkey, which publish only on their own websites; we are building the readers for them. Most cities there are missing from this board, not clean. Why.