| 107 | Unhealthy for Sensitive Groups on Thursday, Feb 5th 2026, 11:00 am |  |
Cities with the worst air quality
| # | AQI | City |
|---|---|---|
171 | ||
161 | ||
126 | ||
126 | ||
124 | ||
116 | ||
90 | ||
69 |
Cities with the best air quality
| # | AQI | City |
|---|---|---|
25 | ||
29 | ||
50 | ||
52 | ||
63 | ||
67 | ||
67 |
Good | Moderate | Unhealthy for sensitive groups | Unhealthy | Very Unhealthy | Hazardous |
Cambodia, and especially its capital Phnom Penh, is just subjected to Air Pollution just like any other countries in Asia.
Cambodia ranks 162nd (out of 178 countries) at the Environmental Performance Index for Air Quality. This air pollution problem, just like other countries is South Asia, is becoming even more important for World Heritage Sites like the Angkor Archeological Park (Siem Reap) - due to the hundreds of tuk-tuks and buses carrying the tourist (check this article). You can read useful advices from the US Embassy on Phnom Penh "Dirty Air", or this interesting blog post about "Air pollution is hardly Cambodia’s highest priority".
Air Quality Data availability
Like most of the countries in Asia, there is no reason why there should not be real-time Air Quality monitoring in Cambodia, at least for Phnom Penh and Siem Reap.
Unfortunately, there is not much information about real-time Air Quality data from the Ministry of the Environment (MOE).
And projects like the ASEAN-German Clean Air for Smaller Cities looked promising, but did not provide any tangible monitoring result.
The best solution for providing real-time Air Quality information in Cambodia is for the MOE to start providing official hourly AQI readings. But this can, sometimes, take more time than expected.
Light but visible Air Pollution on Phnom Penh Skyline (attribution).
(Check this articlefor an explanatiom about visual air quality)If you want to stay informed about the Air Quality monitoring project, please register with the form below:
Our GAIA air quality monitors are very easy to set up: You only need a WIFI access point and a USB compatible power supply.
Once connected, your real time air pollution levels are instantaneously available on the maps and through the API.
The station comes with a 10-meter water-proof power cable, a USB power supply, mounting equipment and an optional solar panel.
| | |
| or let us find your nearest air quality monitoring station |
Africa
🇧🇼 Botswana 🇧🇫 Burkina Faso 🇨🇫 Central African Republic 🇨🇩 Congo, The Democratic Republic Of 🇪🇬 Egypt 🇬🇶 Equatorial Guinea 🇪🇹 Federal Democratic Republic of Ethiopia 🇰🇲 Federal Islamic Republic of the Comoros 🇸🇴 Federal Republic of Somalia 🇬🇦 Gabonese Republic 🇬🇭 GhanaAntarctica
🇦🇶 Antarctica 🇧🇻 Bouvet Island 🇹🇫 French Southern Territories 🇭🇲 Heard Island and McDonald Islands 🇬🇸 South Georgia and the South Sandwich IslandsAsia
🇧🇩 BangladeshEurope
🇧🇦 Bosnia and HerzegovinaNorth America
🇦🇮 Anguilla 🇦🇬 Antigua and Barbuda 🇦🇼 ArubaOceania
🇦🇸 American Samoa 🇦🇺 AustraliaSouth America
🇦🇷 Argentine Republic| AQI | Air Pollution Level | Health Implications | Cautionary Statement (for PM2.5) |
| 0 - 50 | Good | Air quality is considered satisfactory, and air pollution poses little or no risk | None |
| 51 -100 | Moderate | Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution. | Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion. |
| 101-150 | Unhealthy for Sensitive Groups | Members of sensitive groups may experience health effects. The general public is not likely to be affected. | Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion. |
| 151-200 | Unhealthy | Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects | Active children and adults, and people with respiratory disease, such as asthma, should avoid prolonged outdoor exertion; everyone else, especially children, should limit prolonged outdoor exertion |
| 201-300 | Very Unhealthy | Health warnings of emergency conditions. The entire population is more likely to be affected. | Active children and adults, and people with respiratory disease, such as asthma, should avoid all outdoor exertion; everyone else, especially children, should limit outdoor exertion. |
| 300+ | Hazardous | Health alert: everyone may experience more serious health effects | Everyone should avoid all outdoor exertion |
| Celsius | |
