Fine particles
4.9µg/m³Good · 1 hourCAMS model • Open-Meteo
RiobambaAir quality, PM2.5 and PM10
Check PM2.5 and PM10 particle levels alongside ozone, nitrogen dioxide and other gases. Compare the latest available concentrations with recent days and explore changes in air pollution through the available historical records.
Riobamba - latest available concentrations (September 25, 2026, 20:00 local time): PM2.5: 4.9 µg/m³, PM10: 4.9 µg/m³, O₃: 42 µg/m³, NO₂: 21.1 µg/m³, SO₂: 7.7 µg/m³, CO: 266 µg/m³. These are hourly CAMS model values for a point representing the city.
Air quality questions →
1 weather warning in effect for Ecuador
Riobamba · Air pollutant concentrations
Data time: September 25, 2026 · 20:00 · local timeParticulate matter
4.9µg/m³Good · 1 hourOzone
42µg/m³Good · 1 hourNitrogen dioxide
21.1µg/m³Fair · 1 hourSulphur dioxide
7.7µg/m³Good · 1 hourCarbon monoxide
266µg/m³PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →
DAILY DATA · Riobamba
Riobamba - air pollution over recent days (2026-08-30 - 2026-09-24)
Concentrations of all available pollutants for this city.
PM2.5Lowest 4.76 2026-09-06Highest 10.45 2026-09-022026-08-30 - 2026-09-24
PM10Lowest 4.9 2026-09-24Highest 10.78 2026-09-022026-08-30 - 2026-09-24
O₃Lowest 30.58 2026-08-30Highest 54.46 2026-09-212026-08-30 - 2026-09-24
NO₂Lowest 3.7 2026-09-20Highest 11.45 2026-08-312026-08-30 - 2026-09-24
SO₂Lowest 2.6 2026-09-18Highest 5.26 2026-09-212026-08-30 - 2026-09-24
COLowest 157.08 2026-09-06Highest 302 2026-09-242026-08-30 - 2026-09-24
Scroll the chart or table sideways to see the full period.
| Pollutant | 2026-09-24 | 2026-09-23 | 2026-09-22 | 2026-09-21 | 2026-09-20 | 2026-09-19 | 2026-09-18 | 2026-09-06 | 2026-09-05 | 2026-09-04 | 2026-09-03 | 2026-09-02 | 2026-09-01 | 2026-08-31 | 2026-08-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 4.83 | 8.65 | 6.07 | 6.83 | 8.63 | 7.13 | 7.46 | 4.76 | 6.8 | 5.43 | 7.68 | 10.45 | 9.09 | 9.43 | 4.96 |
| PM10 | 4.9 | 8.98 | 6.31 | 7.1 | 9.15 | 7.49 | 7.84 | 5.44 | 7.39 | 5.72 | 7.99 | 10.78 | 9.41 | 9.77 | 5.33 |
| O₃ | 52.83 | 45.38 | 53.5 | 54.46 | 45.63 | 44.63 | 44.21 | 45.67 | 36.96 | 38 | 38.92 | 39.75 | 42.83 | 37.08 | 30.58 |
| NO₂ | 8.29 | 6.94 | 6.18 | 5.46 | 3.7 | 4.21 | 6.4 | 5.56 | 5.64 | 8.83 | 9.89 | 9.18 | 10.52 | 11.45 | 7.42 |
| SO₂ | 3.5 | 3.02 | 2.88 | 5.26 | 3.8 | 2.99 | 2.6 | 3.53 | 3.19 | 3.41 | 3.54 | 3.41 | 3.72 | 3.89 | 4.85 |
| CO | 302 | 262.79 | 232.38 | 220.38 | 215.29 | 211.79 | 233 | 157.08 | 208 | 245.96 | 269.04 | 250.17 | 221 | 236.38 | 167.79 |
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 · Riobamba
Archived ratings of the local environment: green spaces, cleanliness, noise and water quality. Opinion indicators are separate from pollutant concentration measurements.
| Indicator | Riobamba | Colombia | Peru | Panama | Costa Rica | Nicaragua |
|---|---|---|---|---|---|---|
| Green and Parks in the City | 54% | 57% | 45% | 51% | 61% | 43% |
| particulate matter PM2.5 (µg/m³) | 8.8 | — | — | — | — | — |
| Pleasure of spending time in the city | 65% | 47% | 36% | 55% | 62% | 52% |
| particulate matter PM10 (µg/m³) | 19.6 | — | — | — | — | — |
| Air Pollution | 23% | 63% | 76% | 42% | 36% | 39% |
| Garbage Disposal | 46% | 50% | 36% | 33% | 50% | 30% |
| Availability and quality of drinking water | 75% | 73% | 38% | 66% | 83% | 49% |
| Cleanliness and tidiness | 54% | 45% | 29% | 37% | 46% | 29% |
| Noise and Light pollution | 46% | 57% | 68% | 60% | 47% | 63% |
| Water Pollution | 67% | 52% | 76% | 57% | 44% | 73% |
Air quality in nearby cities
All cities →Ecuador↗
Ambato
PM2.52.1
PM102.1
µg/m³
PM2.5 · GoodNO₂ 6.7O₃ 73
September 25, 202620:00
Ecuador↗
Quevedo
PM2.55
PM105.6
µg/m³
PM2.5 · GoodNO₂ 7.1O₃ 58
September 25, 202620:00
Ecuador↗
Cuenca
PM2.53.1
PM103.1
µg/m³
PM2.5 · GoodNO₂ 8O₃ 57
September 25, 202620:00
Ecuador↗
Guayaquil
PM2.58.8
PM1012.5
µg/m³
PM2.5 · FairNO₂ 10.2O₃ 42
September 25, 202620:00
Ecuador↗
Quito
PM2.57.4
PM107.4
µg/m³
PM2.5 · FairNO₂ 25.6O₃ 29
September 25, 202620:00
Ecuador↗
Santo Domingo de los Colorados
PM2.54.5
PM104.7
µg/m³
PM2.5 · GoodNO₂ 5.7O₃ 72
September 25, 202620:00
Ecuador↗
Portoviejo
PM2.55.6
PM108
µg/m³
PM2.5 · FairNO₂ 3.7O₃ 41
September 25, 202620:00
Ecuador↗
Machala
PM2.56.7
PM1010.1
µg/m³
PM2.5 · FairNO₂ 2O₃ 46
September 25, 202620:00
Ecuador · air quality in other cities
WEATHER & SURROUNDINGS
Riobamba · weather forecast
Daily maximum and minimum temperatures. Forecast point: -1.671, -78.6471.
Scroll the forecast to see the following days.
Riobamba · September 23, 2026: minimum temperature 10°C, maximum 15.3°C. Wind: 10.1 km/h. Humidity: 90%.
Full forecast: temperature, rainfall, wind and humidity
| Date | Day °C | Min °C | Max °C | Night °C | Rain mm | Wind m/s | Humidity % | Clouds % |
|---|---|---|---|---|---|---|---|---|
| 2026-09-23 | 13.1 | 10 | 15.3 | 10.4 | 3.5 | 2.8 | 90 | 97 |
| 2026-09-24 | 20 | 10.4 | 20 | 11.8 | 2.9 | 3.9 | 53 | 97 |
| 2026-09-25 | 20 | 8.9 | 20.1 | 10.4 | 0.2 | 5.4 | 48 | 29 |
| 2026-09-26 | 20.6 | 8.8 | 20.6 | 11 | 0.5 | 6.3 | 43 | 92 |
| 2026-09-27 | 13 | 9.8 | 14 | 9.8 | 4.2 | 2.9 | 89 | 89 |
| 2026-09-28 | 17.2 | 10.1 | 17.2 | 10.2 | 2.5 | 3.4 | 68 | 97 |
| 2026-09-29 | 19.2 | 8.8 | 19.2 | 12.7 | 2.4 | 4.9 | 58 | 44 |
| 2026-09-30 | 20.9 | 10.3 | 20.9 | 12.2 | 2.3 | 2.2 | 47 | 62 |
| 2026-10-01 | 19.2 | 11.1 | 19.2 | 11.6 | 3.4 | 4.5 | 61 | 41 |
| 2026-10-02 | 20.2 | 9.7 | 20.2 | 13 | 3.3 | 3.5 | 51 | 90 |
| 2026-10-03 | 17.9 | 11.1 | 17.9 | 12.9 | 6 | 2.7 | 67 | 100 |
| 2026-10-04 | 14 | 10.5 | 14 | 10.5 | 3.7 | 2.8 | 85 | 99 |
| 2026-10-05 | 18.4 | 8.2 | 18.4 | 10.3 | 1 | 4.5 | 56 | 49 |
| 2026-10-06 | 18.9 | 8.5 | 18.9 | 11.5 | 1.5 | 4.7 | 56 | 45 |
| 2026-10-07 | 17.9 | 9.3 | 17.9 | 13.1 | 2.7 | 3.6 | 64 | 49 |
| 2026-10-08 | 16.4 | 11.1 | 17 | 13.1 | 5 | 2.5 | 73 | 82 |
| 2026-10-09 | 13.2 | 11.2 | 13.5 | 11.2 | 8.8 | 1.7 | 88 | 100 |
UV index by day · Riobamba
City data.
SPF 50, long sleeves and shade between 10:00-16:00.
0-2 low3-5 moderate6-7 high8-10 very high11+ extreme
Scroll the forecast to see the following days.
Riobamba · September 25, 2026: UV index: 9.9 .
| Indicator | 2026-09-25 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index | 9.9 | 10.2 | 2.2 | 4.8 | 8.7 | 9.2 | 8.9 | 8.5 | 6.8 | 2.1 | 6.5 | 5.9 | 7.5 | 5.5 | 1.4 | — |
AIR QUALITY QUESTIONS
Riobamba · air pollution - questions and answers
What do the latest air quality data show for Riobamba?
Riobamba - latest available concentrations (September 25, 2026, 20:00 local time): PM2.5: 4.9 µg/m³, PM10: 4.9 µg/m³, O₃: 42 µg/m³, NO₂: 21.1 µg/m³, SO₂: 7.7 µg/m³, CO: 266 µg/m³. These are hourly CAMS model values for a point representing the city.
When was PM2.5 highest in Riobamba over the past week?
The highest available daily mean PM2.5 was 8.6 µg/m³ (September 23, 2026). This comparison covers 7 days with data in the seven days before September 25, 2026. The day of the latest reading is excluded because it may be incomplete.
Is the PM2.5 concentration for Riobamba 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 Riobamba?
For September 25, 2026, the forecast UV index is 9.9. The UV section also shows the following available days.
What wind speed is forecast for Riobamba?
For September 23, 2026, forecast wind speed is 10.1 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.