Air quality
Air quality in Sergiyev Posad today
Updated
Good (US AQI 39) Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. Model estimate for Sun, Oct 25, 11:00 pm (20:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Sergiyev Posad, Moscow Oblast, Russia, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 39 Good
- PM2.5
- 7.5 µg/m³ 0.5× WHO 24-h guideline
- PM10
- 9.5 µg/m³
- Ozone
- 43 µg/m³
- Dominant pollutant
- PM2.5 sub-index 39
- Best hour tomorrow
- 4:00 pm AQI 31
- European AQI
- 25
Air quality in Sergiyev Posad right now
Right now the modelled US Air Quality Index for Sergiyev Posad, Moscow Oblast, Russia is 39, which falls in the "Good" band (up to 50). Air quality is satisfactory and poses little or no risk; a good time for outdoor activity.
The index is driven mainly by PM2.5, whose own sub-index is 39. 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 7.5 µg/m³, within the WHO 24-hour guideline of 15 µg/m³; PM10 is 9.5 µg/m³ against a guideline of 45; ozone is 43 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 5.7 µg/m³ (below the 24-hour guideline of 25).
Also this hour: carbon monoxide 152 µg/m³.
NASA FIRMS shows 55 fire hotspots within 300 km in the last day (nearest about 35 km), but particle levels are not elevated enough to point to smoke right now.
Sergiyev Posad AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 31 around Mon 4:00 pm to 39 around Sun 11:00 pm, staying "Good" throughout.
The following day looks similar, averaging about 38.
| Local time (Europe/Moscow) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Sun 11:00 pm | 39 | Good | 7.5 | 10 | 43 |
| Mon 2:00 am | 37 | Good | 5.1 | 7 | 45 |
| Mon 5:00 am | 35 | Good | 5 | 6 | 40 |
| Mon 8:00 am | 33 | Good | 5.9 | 7 | 35 |
| Mon 11:00 am | 33 | Good | 5.4 | 7 | 49 |
| Mon 2:00 pm | 32 | Good | 3.9 | 5 | 54 |
| Mon 5:00 pm | 31 | Good | 5 | 6 | 53 |
| Mon 8:00 pm | 31 | Good | 7.3 | 8 | 47 |
| Mon 11:00 pm | 31 | Good | 7.1 | 8 | 42 |
| Tue 2:00 am | 31 | Good | 6.8 | 10 | 39 |
| Tue 5:00 am | 32 | Good | 7.3 | 10 | 37 |
| Tue 8:00 am | 34 | Good | 8.3 | 12 | 33 |
| Tue 11:00 am | 36 | Good | 10.6 | 15 | 33 |
| Tue 2:00 pm | 40 | Good | 10.7 | 20 | 41 |
| Tue 5:00 pm | 45 | Good | 13.1 | 20 | 37 |
| Tue 8:00 pm | 50 | Good | 12.8 | 17 | 26 |
| Tue 11:00 pm | 51 | Moderate | 14.6 | 17 | 23 |
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 Sergiyev Posad tomorrow
Between 6 am and 9 pm local time, the cleanest air tomorrow is forecast around 4:00 pm (AQI 31, Good) and the worst around 6:00 am (AQI 34). The difference across the day is small, so timing matters little.
Sergiyev Posad vs the rest of Russia
Across 76 Russia cities we track, the average US AQI right now is 46 (Good). Sergiyev Posad at 39 is 7 points cleaner than average.
For context, the median across 3,909 cities worldwide is 56.
Air quality in cities near Sergiyev Posad
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Moscow | 70 km | 84 | Moderate | 21 |
| Cherëmushki | 80 km | 84 | Moderate | 21 |
| Vladimir | 141 km | 25 | Good | 4.9 |
| Tver | 150 km | 50 | Good | 7.3 |
| Yaroslavl | 180 km | 62 | Moderate | 13.5 |
| Ivanovo | 189 km | 30 | Good | 5.8 |
| Ryazan’ | 212 km | 30 | Good | 4.2 |
| Kaluga | 231 km | 37 | Good | 7.4 |
Model vs measured
The nearest measured PM2.5 reading is 2.6 µg/m³ from Sensor.Community (median of 3 sensors), centred about 20 km from the city centre. That is 4.9 µg/m³ below the model estimate of 7.5 µg/m³. Low-cost sensors can read high in humid air; reference monitors are more accurate but sparser.
Advice for sensitive groups
With the AQI at 39, there is no need for sensitive groups to change plans. People with asthma should still carry their reliever inhaler as usual.
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 Sergiyev Posad
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), Sensor.Community, NASA FIRMS.