Air quality
Air quality in Iaşi today
Updated
Moderate (US AQI 53) Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. Model estimate for Sun, Oct 25, 8:00 pm (18:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Iaşi, Iași County, Romania, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 53 Moderate
- PM2.5
- 10 µg/m³ 0.7× WHO 24-h guideline
- PM10
- 14 µg/m³
- Ozone
- 51 µg/m³
- Dominant pollutant
- PM2.5 sub-index 53
- Best hour tomorrow
- 8:00 am AQI 46
- European AQI
- 30
Air quality in Iaşi right now
Right now the modelled US Air Quality Index for Iaşi, Iași County, Romania is 53, which falls in the "Moderate" band (up to 100). Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors.
The index is driven mainly by PM2.5, whose own sub-index is 53. Fine and coarse particles come from traffic, heating, industry, dust and smoke; they build up on calm nights and clear when wind or rain arrives.
PM2.5 is 10 µg/m³, within the WHO 24-hour guideline of 15 µg/m³; PM10 is 14 µg/m³ against a guideline of 45; ozone is 51 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 4.2 µg/m³ (below the 24-hour guideline of 25).
Also this hour: carbon monoxide 188 µg/m³.
NASA FIRMS shows 10 fire hotspots within 300 km in the last day (nearest about 223 km), but particle levels are not elevated enough to point to smoke right now.
Iaşi AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 46 around Mon 8:00 am to 53 around Sun 8:00 pm, from "Good" at best to "Moderate" at worst.
The following day looks similar, averaging about 46.
| Local time (Europe/Bucharest) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Sun 8:00 pm | 53 | Moderate | 10.1 | 14 | 51 |
| Sun 11:00 pm | 52 | Moderate | 9.7 | 12 | 51 |
| Mon 2:00 am | 50 | Good | 8.9 | 10 | 56 |
| Mon 5:00 am | 48 | Good | 8.5 | 10 | 49 |
| Mon 8:00 am | 46 | Good | 8.4 | 10 | 46 |
| Mon 11:00 am | 46 | Good | 6 | 8 | 63 |
| Mon 2:00 pm | 47 | Good | 6.5 | 9 | 75 |
| Mon 5:00 pm | 47 | Good | 7.5 | 9 | 67 |
| Mon 8:00 pm | 47 | Good | 12.5 | 14 | 46 |
| Mon 11:00 pm | 49 | Good | 14.4 | 17 | 35 |
| Tue 2:00 am | 50 | Good | 6 | 6 | 43 |
| Tue 5:00 am | 47 | Good | 3.3 | 4 | 44 |
| Tue 8:00 am | 44 | Good | 4.9 | 5 | 36 |
| Tue 11:00 am | 42 | Good | 5.4 | 6 | 37 |
| Tue 2:00 pm | 42 | Good | 10 | 11 | 32 |
| Tue 5:00 pm | 45 | Good | 17.4 | 18 | 34 |
| Tue 8:00 pm | 51 | Moderate | 26.9 | 29 | 38 |
Every third hour of the CAMS forecast via Open-Meteo. US AQI uses rolling averages (24 h for particles, 8 h for ozone), so it moves more slowly than the hourly concentrations.
Best time to be outside in Iaşi tomorrow
Between 6 am and 9 pm local time, the cleanest air tomorrow is forecast around 8:00 am (AQI 46, Good) and the worst around 6:00 am (AQI 47). The difference across the day is small, so timing matters little.
Iaşi vs the rest of Romania
Across 6 Romania cities we track, the average US AQI right now is 55 (Moderate). Iaşi at 53 is about average.
It ranks 3 of 6 from cleanest to most polluted; the cleanest is Constanţa (41) and the most polluted Bucharest (61).
For context, the median across 3,909 cities worldwide is 57.
Air quality in cities near Iaşi
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Roman | 58 km | 60 | Moderate | 12.1 |
| Chisinau | 97 km | 49 | Good | 14.9 |
| Vinnytsya | 239 km | 55 | Moderate | 9.1 |
| Cheremushky | 250 km | 46 | Good | 10.1 |
| Odesa | 251 km | 46 | Good | 10.1 |
| Khmelnytskyi | 255 km | 43 | Good | 7.8 |
| Cluj-Napoca | 307 km | 60 | Moderate | 22.9 |
| Bucharest | 325 km | 61 | Moderate | 16.9 |
Model vs measured
The nearest measured PM2.5 reading is 6.8 µg/m³ from Sensor.Community (median of 7 sensors), centred about 2 km from the city centre. That is 3.3 µg/m³ below the model estimate of 10 µg/m³. Low-cost sensors can read high in humid air; reference monitors are more accurate but sparser.
Advice for sensitive groups
At 53, most people are fine outdoors. If you are unusually sensitive to PM2.5, keep long or intense workouts to the cleaner hours shown above.
What the US AQI numbers mean
| US AQI | Category | What it means |
|---|---|---|
| 0-50 | Good | Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. |
| 51-100 | Moderate | Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. |
| 101-150 | Unhealthy for Sensitive Groups | People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors. |
| 151-200 | Unhealthy | Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed. |
| 201-300 | Very Unhealthy | Health alert: everyone should avoid prolonged or heavy exertion outdoors, and sensitive groups should stay indoors. |
| 301-500 | Hazardous | Emergency conditions: everyone should avoid all outdoor physical activity and stay indoors with filtered air if possible. The scale tops out at 500; heavier dust or smoke is shown as 500. |
Values on this page are modelled by CAMS (Copernicus) and served by Open-Meteo; they are estimates for the area around the city centre, not readings from an official monitor.
Nearby cities
More for Iaşi
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), Sensor.Community, NASA FIRMS.