Cleanest Cities in the World

Many different things can be said about what is clean and what makes a city “clean.” A clean city does not always imply that one may eat off the sidewalks or streets.




A clean city may be defined by the absence of litter on the streets, the availability of clean water, or the quality of the air — or all three.

For a city to be clean, the problems that lead to dirty and unhealthy places to live need to be fixed. This involves trash management, building transportation infrastructure that is energy-efficient and environmentally friendly, avoiding littering, and enacting sanitation legislation.

Pollution is a significant aspect of evaluating a city’s cleanliness. Pollution is the release of toxins into the air and environment that have negative consequences.

Air pollution causes lung cancer, cardiovascular illness, chronic obstructive pulmonary disease, and other major health problems in both the environment and the human body.

There are a lot of variables that contribute to the degree of pollution experienced by cities across the globe. Cities have been working on green programs for numerous years to introduce greener modes of transportation, and procedures, and decrease pollution levels.

In the United States, Congress enacted multiple Clean Air Acts to enact stronger pollution rules, resulting in significant reductions in pollution levels such as carbon dioxide and particle emissions.

Best Life looked at 200 of the world’s most populous cities to see which were the cleanest.




Air pollution levels (both PM10 and PM2.5), Mercer’s quality of life rating, the country’s Environmental Performance Index, and if the city appeared in Monocle’s Quality of Life survey were all considered. Not every city on the list is ranked by Mercer and Monocle.

The world’s cleanest cities (and their clean city ratings) are based on these data points:

  • London, England, United Kingdom (74.94)
  • Paris, France (74.90)
  • New York City, New York, United States (74.89)
  • Madrid, Spain (72.66)
  • Auckland, New Zealand (71.97)
  • Hamburg, Germany (71.32)
  • Barcelona, Spain (70.46)
  • Berlin, Germany (70.28)
  • Vienna, Austria (70.17)
  • Sapporo, Japan (68.89)

The cleanest city in the world is London, which is in the United Kingdom. London receives a 74.94 overall clean city score and a 79.89 Environmental Performance Index score.

Following that are Paris and New York City. Many people may be surprised to learn that New York Metropolis is the most populous and densely inhabited city in the United States, with a population of over 8.3 million people and a density of 27,755 people per square mile.




Keeping cities clean is difficult since they house around 55 percent of the world’s population, making them the densely inhabited locations on the planet.

With urban populations predicted to reach 68 percent of the world population in the next several decades, both governments and citizens must work hard to maintain city cleanliness and quality.

Cleanest Cities in the World by Population 2022

CityCountryPM2.5 (µg/m³) Clean City ScoreMonocle Qual. of Life RankEnv. Perf. ScoreMercer Score
AucklandNew Zealand671.9775.963
MelbourneAustralia868.8374.1216
TorontoCanada867.6372.1816
LondonUnited Kingdom974.9479.8940
New YorkUnited States974.8979.8944
PhoenixUnited States966.1971.19
PhiladelphiaUnited States965.5971.1956
MadridSpain1072.661078.3951
SapporoJapan1068.8974.69
MontrealCanada1067.0272.1823
HoustonUnited States1065.3971.1967
Los AngelesUnited States1164.9971.1958
CuritibaBrazil1153.6260.7
Davao CityPhilippines1151.2457.65
ChicagoUnited States1264.3971.1947
Porto AlegreBrazil1352.360.7
HamburgGermany1471.32978.3719
Buenos AiresArgentina1451.2459.393
BarcelonaSpain1570.461778.3942
TokyoJapan1570.09174.6947
KyotoJapan1566.051274.69
YokohamaJapan1565.8974.6951
BerlinGermany1670.28378.3713
NagoyaJapan1665.4974.6963
Rio de JaneiroBrazil1647.760.7118
RomeItaly1767.9676.9657
OsakaJapan1764.8974.6960
CaliColombia1753.5365.22
AlexandriaEgypt1753.2661.21
ParisFrance1874.983.9538
ViennaAustria1870.17278.971
SingaporeSingapore1854.632164.2325
FukuokaJapan1963.891474.69
TaipeiTaiwan1963.4572.8485
New Taipei CityTaiwan1963.4472.84
São PauloBrazil1949.960.7121
MoscowRussia2053.3363.79168
DaejeonSouth Korea2249.7862.3
KwangjuSouth Korea2249.762.3
BucharestRomania2354.0464.78107
BogotáColombia2450.0465.22129
DaeguSouth Korea2448.5662.3
SeoulSouth Korea2448.2562.376
BudapestHungary2554.2165.0178
CaracasVenezuela2549.463.89189
WarsawPoland2652.3164.1181
MedellinColombia2650.9165.22
TaichungTaiwan2958.2972.84101
TainanTaiwan2958.1672.84
KaohsiungTaiwan3057.772.84




Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top