Air quality
Air quality in Pātan today
Updated
Moderate (US AQI 87) Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. Model estimate for Mon, Oct 26, 6:45 am (01:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Pātan, Bagmati Province, Nepal, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 87 Moderate
- PM2.5
- 37 µg/m³ 2.5× WHO 24-h guideline
- PM10
- 41 µg/m³
- Ozone
- 84 µg/m³
- Dominant pollutant
- PM2.5 sub-index 87
- Best hour today
- 12:45 pm AQI 84
- European AQI
- 53
Air quality in Pātan right now
Right now the modelled US Air Quality Index for Pātan, Bagmati Province, Nepal is 87, 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 87. 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 37 µg/m³, 2.5 times the WHO 24-hour guideline of 15 µg/m³; PM10 is 41 µg/m³ against a guideline of 45; ozone is 84 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 13 µg/m³ (below the 24-hour guideline of 25).
Also this hour: carbon monoxide 657 µg/m³.
Pātan AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 84 around Mon 12:45 pm to 107 around Mon 4:45 pm, from "Moderate" at best to "Unhealthy for Sensitive Groups" at worst.
The following day is expected to be worse, averaging about 101 against 90 for the next 24 hours.
| Local time (Asia/Kathmandu) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Mon 6:45 am | 87 | Moderate | 37.1 | 41 | 84 |
| Mon 9:45 am | 85 | Moderate | 12.5 | 15 | 134 |
| Mon 12:45 pm | 84 | Moderate | 9.8 | 11 | 151 |
| Mon 3:45 pm | 101 | Unhealthy for Sensitive Groups | 11.1 | 12 | 134 |
| Mon 6:45 pm | 99 | Moderate | 29.3 | 31 | 94 |
| Mon 9:45 pm | 85 | Moderate | 51.5 | 53 | 75 |
| Tue 12:45 am | 88 | Moderate | 55.6 | 58 | 67 |
| Tue 3:45 am | 91 | Moderate | 52.4 | 55 | 56 |
| Tue 6:45 am | 95 | Moderate | 49.1 | 52 | 65 |
| Tue 9:45 am | 98 | Moderate | 16.7 | 19 | 132 |
| Tue 12:45 pm | 98 | Moderate | 12.9 | 16 | 158 |
| Tue 3:45 pm | 102 | Unhealthy for Sensitive Groups | 13.9 | 17 | 140 |
| Tue 6:45 pm | 108 | Unhealthy for Sensitive Groups | 34.2 | 37 | 97 |
| Tue 9:45 pm | 101 | Unhealthy for Sensitive Groups | 55.8 | 59 | 77 |
| Wed 12:45 am | 103 | Unhealthy for Sensitive Groups | 56.9 | 61 | 64 |
| Wed 3:45 am | 102 | Unhealthy for Sensitive Groups | 44.9 | 48 | 58 |
| Wed 6:45 am | 99 | Moderate | 33.3 | 36 | 62 |
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 Pātan today
Between 6 am and 9 pm local time, the cleanest air today is forecast around 12:45 pm (AQI 84, Moderate) and the worst around 4:45 pm (AQI 107). That is a swing of 23 points, so a run or walk around 12:45 pm is noticeably better.
Pātan vs the rest of Nepal
Across 5 Nepal cities we track, the average US AQI right now is 91 (Moderate). Pātan at 87 is about average.
It ranks 3 of 5 from cleanest to most polluted; the cleanest is Pokhara (58) and the most polluted Birgañj (118).
For context, the median across 3,909 cities worldwide is 57.
Air quality in cities near Pātan
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Kathmandu | 3 km | 91 | Moderate | 42.6 |
| Birgañj | 85 km | 118 | Unhealthy for Sensitive Groups | 51.2 |
| Bharatpur | 86 km | 95 | Moderate | 38.5 |
| Dhāka, Bihar | 112 km | 178 | Unhealthy | 156 |
| Pokhara | 148 km | 58 | Moderate | 8.2 |
| Muzaffarpur | 173 km | 162 | Unhealthy | 118.7 |
| Kushinagar | 175 km | 155 | Unhealthy | 87.5 |
| Darbhanga | 179 km | 155 | Unhealthy | 102.4 |
Model vs measured
The nearest measured PM2.5 reading is 14 µg/m³ from Sensor.Community (median of 3 sensors), centred about 6 km from the city centre. That is 22.7 µg/m³ below the model estimate of 37 µg/m³. Low-cost sensors can read high in humid air; reference monitors are more accurate but sparser.
Wildfire smoke
PM2.5 is forecast to reach 56 µg/m³ in the next 24 hours while NASA satellites detected 36 fire hotspots within 300 km in the last day (nearest about 84 km away). Smoke is a likely contributor: keep windows closed, run an air purifier or HVAC filter, and check the fire map before heading out.
Advice for sensitive groups
At 87, 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 Pātan
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), Sensor.Community, NASA FIRMS.