Fine particles
12µg/m³CAMS model • Open-Meteo
CambodiaAir quality, PM2.5 and PM10
Compare air quality across cities in this country. Explore PM2.5, PM10 and other pollutant concentrations, check data timestamps, and view recent trends and historical charts.
Cambodia - average concentrations across available points: PM2.5: 12 µg/m³, PM10: 13.6 µg/m³, O₃: 52 µg/m³, NO₂: 3.8 µg/m³, SO₂: 2.6 µg/m³, CO: 215.5 µg/m³. Date range: September 27, 2026. Each point contributes its latest available hourly value; this is not a daily or population-weighted average.
Lowest PM2.5: Battambang (6.5 µg/m³). Highest PM2.5: Phnom Penh (18.7 µg/m³). This comparison covers 4 cities on September 27, 2026 using their latest available hourly values. Reading times may differ; this is not an annual-average ranking.
Air quality questions →All cities · Cambodia
4 citiesCambodia↗
Phnom Penh
PM2.518.7
PM1020.3
µg/m³
PM2.5 · ModerateNO₂ 7.5O₃ 59
September 27, 202608:00
Cambodia↗
Kampong Saom
PM2.511
PM1013.2
µg/m³
PM2.5 · FairNO₂ 1.6O₃ 63
September 27, 202608:00
Cambodia↗
Battambang
PM2.56.5
PM107.2
µg/m³
PM2.5 · FairNO₂ 3.1O₃ 39
September 27, 202608:00
Cambodia↗
Siem Reap
PM2.511.8
PM1013.5
µg/m³
PM2.5 · FairNO₂ 3O₃ 47
September 27, 202608:00
PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →
AVERAGE ACROSS AVAILABLE COUNTRY POINTS
Latest concentrations · Cambodia
Particulate matter
13.6µg/m³Ozone
52µg/m³Nitrogen dioxide
3.8µg/m³Sulphur dioxide
2.6µg/m³Carbon monoxide
215.5µg/m³Average of the latest available hour at each model point. This is neither a population-weighted nor a daily average.
DAILY DATA · Cambodia
Cambodia - air pollution over recent days (2026-08-31 - 2026-09-26)
Averages across available points in the country. These are not population-weighted averages.
PM2.5Lowest 4.17 2026-09-25Highest 8.52 2026-09-052026-08-31 - 2026-09-26
PM10Lowest 4.36 2026-09-23Highest 12.42 2026-09-052026-08-31 - 2026-09-26
O₃Lowest 44.43 2026-09-26Highest 58.54 2026-09-242026-08-31 - 2026-09-26
NO₂Lowest 2.15 2026-08-31Highest 3.83 2026-09-242026-08-31 - 2026-09-26
SO₂Lowest 0.74 2026-08-31Highest 1.45 2026-09-202026-08-31 - 2026-09-26
COLowest 136.48 2026-09-06Highest 265.16 2026-09-212026-08-31 - 2026-09-26
Scroll the chart or table sideways to see the full period.
| Pollutant | 2026-09-26 | 2026-09-25 | 2026-09-24 | 2026-09-23 | 2026-09-22 | 2026-09-21 | 2026-09-20 | 2026-09-07 | 2026-09-06 | 2026-09-05 | 2026-09-04 | 2026-09-03 | 2026-09-02 | 2026-09-01 | 2026-08-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 5.65 | 4.17 | 5.39 | 4.19 | 8.48 | 5.6 | 6.9 | 4.53 | 7.72 | 8.52 | 7.7 | 7.6 | 8.03 | 6.3 | 5.86 |
| PM10 | 6.53 | 4.79 | 5.65 | 4.36 | 8.85 | 5.98 | 7.17 | 5.97 | 10.86 | 12.42 | 11.69 | 11.78 | 12.39 | 10 | 9.29 |
| O₃ | 44.43 | 53.81 | 58.54 | 53.74 | 56.14 | 51.9 | 58.33 | 45.97 | 46.27 | 48.8 | 51.84 | 54.49 | 50.69 | 47.11 | 48.56 |
| NO₂ | 3.66 | 3.32 | 3.83 | 3.58 | 3.76 | 3.82 | 3.16 | 2.35 | 2.68 | 2.92 | 2.33 | 2.18 | 2.52 | 2.58 | 2.15 |
| SO₂ | 1.15 | 1.1 | 1.45 | 1.36 | 1.09 | 1.01 | 1.45 | 0.85 | 0.95 | 1.07 | 1.01 | 1 | 0.94 | 0.87 | 0.74 |
| CO | 232.65 | 218.65 | 235.81 | 249.83 | 264.88 | 265.16 | 235.89 | 147.69 | 136.48 | 173.46 | 192.76 | 166.39 | 152.34 | 162.27 | 143.64 |
A dot on the chart and a dash in the table indicate missing data. The latest day may be incomplete.
Environment and quality of life ratings · Cambodia
Archived ratings of the local environment: green spaces, cleanliness, noise and water quality. Opinion indicators are separate from pollutant concentration measurements.
| Indicator | Cambodia | Vietnam | Thailand | laoPDR | Malaysia | Singapore |
|---|---|---|---|---|---|---|
| Green and Parks in the City | 36% | 42% | 42% | 37% | 54% | 80% |
| Pleasure of spending time in the city | 32% | 30% | 37% | 38% | 48% | 74% |
| Air Pollution | 68% | 78% | 71% | 72% | 53% | 34% |
| Garbage Disposal | 25% | 24% | 41% | 20% | 47% | 76% |
| Availability and quality of drinking water | 48% | 43% | 49% | 51% | 56% | 85% |
| Cleanliness and tidiness | 25% | 29% | 38% | 32% | 47% | 81% |
| Noise and Light pollution | 59% | 65% | 57% | 55% | 49% | 50% |
| Water Pollution | 73% | 73% | 69% | 73% | 62% | 25% |
WEATHER & SURROUNDINGS
Cambodia · weather forecast
Daily maximum and minimum temperatures. Forecast point: 12.5657, 104.991.
Scroll the forecast to see the following days.
Cambodia · September 24, 2026: minimum temperature 23.7°C, maximum 28°C. Wind: 22.2 km/h. Humidity: 93%.
Full forecast: temperature, rainfall, wind and humidity
| Date | Day °C | Min °C | Max °C | Night °C | Rain mm | Wind m/s | Humidity % | Clouds % |
|---|---|---|---|---|---|---|---|---|
| 2026-09-24 | 24.9 | 23.7 | 28 | 24.4 | 9.4 | 6.2 | 93 | 100 |
| 2026-09-25 | 26 | 24.3 | 26.9 | 24.7 | 0.4 | 5.7 | 91 | 100 |
| 2026-09-26 | 26 | 24.2 | 28.6 | 24.5 | 9.8 | 5.6 | 88 | 100 |
| 2026-09-27 | 30.2 | 23.5 | 31.9 | 24.4 | 4.2 | 4.8 | 69 | 98 |
| 2026-09-28 | 30 | 23.6 | 31.7 | 25 | 4.2 | 4.1 | 68 | 100 |
| 2026-09-29 | 28.9 | 23.9 | 32 | 26 | 1.4 | 2.7 | 75 | 99 |
| 2026-09-30 | 27.7 | 25 | 30.3 | 25.6 | 0.7 | 2.5 | 78 | 100 |
| 2026-10-01 | 30.2 | 24.8 | 32.4 | 26.9 | 8 | 2.2 | 72 | 90 |
| 2026-10-02 | 25.7 | 23.8 | 27.4 | 24.8 | 33.2 | 5.4 | 83 | 100 |
| 2026-10-03 | 30.2 | 24.1 | 32 | 25.3 | 11.9 | 2.6 | 74 | 100 |
| 2026-10-04 | 29.7 | 25.2 | 32.3 | 25.4 | 10.9 | 3.5 | 77 | 95 |
| 2026-10-05 | 28.6 | 25.5 | 29.4 | 25.7 | 9.2 | 1.8 | 77 | 100 |
| 2026-10-06 | 26.8 | 24.7 | 30.7 | 24.7 | 10.1 | 2.5 | 84 | 100 |
| 2026-10-07 | 28.8 | 24.5 | 31.2 | 24.9 | 16.6 | 1.8 | 74 | 100 |
| 2026-10-08 | 28.4 | 24 | 29.8 | 24.3 | 16.5 | 2.9 | 75 | 100 |
| 2026-10-09 | 27.1 | 23.1 | 30.8 | 24.5 | 0.9 | 3.5 | 69 | 100 |
| 2026-10-10 | 27 | 21.7 | 30.3 | 24.4 | 10.4 | 2.9 | 61 | 91 |
| 2026-10-11 | 27.3 | 21.7 | 30.9 | 24.5 | — | 2.9 | 66 | 90 |
UV index by day · Cambodia
Data for a country reference point. Local conditions may differ.
Seek shade around midday. SPF 30+, sunglasses and a hat for longer stays.
0-2 low3-5 moderate6-7 high8-10 very high11+ extreme
Scroll the forecast to see the following days.
Cambodia · September 26, 2026: UV index: 5.3 .
| Indicator | 2026-09-26 | 2026-09-27 | 2026-09-28 | 2026-09-29 | 2026-09-30 | 2026-10-01 | 2026-10-02 | 2026-10-03 | 2026-10-04 | 2026-10-05 | 2026-10-06 | 2026-10-07 | 2026-10-08 | 2026-10-09 | 2026-10-10 | 2026-10-11 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index | 5.3 | 8.5 | 8.6 | 8.6 | 6.5 | 8 | 3.1 | 7.9 | 7.6 | 5.6 | 7.6 | 7.8 | 8 | 8.1 | 8.3 | — |
AIR QUALITY QUESTIONS
Cambodia · air pollution - questions and answers
What do the latest air quality data show for Cambodia?
Cambodia - average concentrations across available points: PM2.5: 12 µg/m³, PM10: 13.6 µg/m³, O₃: 52 µg/m³, NO₂: 3.8 µg/m³, SO₂: 2.6 µg/m³, CO: 215.5 µg/m³. Date range: September 27, 2026. Each point contributes its latest available hourly value; this is not a daily or population-weighted average.
When was PM2.5 highest in Cambodia over the past week?
The highest available daily mean PM2.5 was 8.5 µg/m³ (September 22, 2026). This comparison covers 7 days with data in the seven days before September 27, 2026. The day of the latest reading is excluded because it may be incomplete.
Which cities in Cambodia have the cleanest and most polluted air by PM2.5?
Lowest PM2.5: Battambang (6.5 µg/m³). Highest PM2.5: Phnom Penh (18.7 µg/m³). This comparison covers 4 cities on September 27, 2026 using their latest available hourly values. Reading times may differ; this is not an annual-average ranking.
Is the PM2.5 concentration for Cambodia an AQI score?
No. PM2.5 and PM10 are concentrations in µg/m³. AQI is a separate index calculated using a defined scale. When comparing air quality, also check other pollutants, the date and the averaging period.
What UV index does the available forecast show for Cambodia?
For September 26, 2026, the forecast UV index is 5.3. The UV section also shows the following available days.
What wind speed is forecast for Cambodia?
For September 24, 2026, forecast wind speed is 22.2 km/h. The weather table includes wind, temperature and other available parameters for subsequent days.
PM2.5 · PM10 · NO₂ · O₃
Understanding air quality and pollution data
What do PM2.5 and PM10 mean?
PM2.5 and PM10 are fractions of airborne particulate matter. PM2.5 covers fine particles up to 2.5 micrometres in diameter, while PM10 covers particles up to 10 micrometres. Concentrations in µg/m³ tell you how many micrograms of particles are present in a cubic metre of air. Compare values over the same time period.
Where does the air pollution data come from?
The latest concentrations come from the CAMS atmospheric model via Open-Meteo for each city’s coordinates. Values describe a model area, so conditions on individual streets may differ. Historical monitoring station data is shown separately where available.
How does PM2.5 concentration differ from AQI?
PM2.5 is the concentration of one particle fraction, expressed in µg/m³. AQI is an index calculated using a particular scale and thresholds. The pollutant cards show concentrations. Our city ranking compares PM2.5; PM10, ozone, nitrogen dioxide and other available gases add to the picture of air quality.
Which dates do the values and charts cover?
Each current value has a data date and time. Current concentration cards show the latest available hour, daily charts summarise individual days, and monthly records let you compare longer periods. These values represent different time intervals.
How can I check pollution in my city?
Search for your city and open its air quality page. Start with PM2.5 and PM10, then check the other available pollutants and the data timestamp. Charts and tables help you compare concentrations over time. Weather and historical climate information complement the pollution data.