Air quality
Air quality in Janakpur today
Updated
Unhealthy for Sensitive Groups (US AQI 148) People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors. Model estimate for Mon, Oct 26, 5:45 am (00:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Janakpur, Madhesh, Nepal, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 148 Unhealthy for Sensitive Groups
- PM2.5
- 58 µg/m³ 3.9× WHO 24-h guideline
- PM10
- 60 µg/m³
- Ozone
- 22 µg/m³
- Dominant pollutant
- PM2.5 sub-index 148
- Best hour today
- 10:45 am AQI 142
- European AQI
- 64
Air quality in Janakpur right now
Right now the modelled US Air Quality Index for Janakpur, Madhesh, Nepal is 148, which falls in the "Unhealthy for Sensitive Groups" band (up to 150). People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors.
The index is driven mainly by PM2.5, whose own sub-index is 148. 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 58 µg/m³, 3.9 times the WHO 24-hour guideline of 15 µg/m³; PM10 is 60 µg/m³ against a guideline of 45; ozone is 22 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 19 µg/m³ (below the 24-hour guideline of 25).
Also this hour: carbon monoxide 995 µg/m³.
Janakpur AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 142 around Mon 10:45 am to 155 around Tue 3:45 am, from "Unhealthy for Sensitive Groups" at best to "Unhealthy" at worst.
The following day is expected to be worse, averaging about 155 against 147 for the next 24 hours.
| Local time (Asia/Kathmandu) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Mon 5:45 am | 148 | Unhealthy for Sensitive Groups | 58 | 60 | 22 |
| Mon 8:45 am | 143 | Unhealthy for Sensitive Groups | 41.9 | 44 | 121 |
| Mon 11:45 am | 143 | Unhealthy for Sensitive Groups | 22.3 | 25 | 159 |
| Mon 2:45 pm | 143 | Unhealthy for Sensitive Groups | 22.4 | 26 | 161 |
| Mon 5:45 pm | 143 | Unhealthy for Sensitive Groups | 49.9 | 53 | 117 |
| Mon 8:45 pm | 148 | Unhealthy for Sensitive Groups | 107.8 | 114 | 75 |
| Mon 11:45 pm | 153 | Unhealthy | 109.2 | 114 | 52 |
| Tue 2:45 am | 154 | Unhealthy | 76.4 | 80 | 31 |
| Tue 5:45 am | 155 | Unhealthy | 59.3 | 61 | 13 |
| Tue 8:45 am | 155 | Unhealthy | 44.2 | 46 | 120 |
| Tue 11:45 am | 156 | Unhealthy | 26.3 | 30 | 160 |
| Tue 2:45 pm | 156 | Unhealthy | 25 | 28 | 154 |
| Tue 5:45 pm | 156 | Unhealthy | 49.6 | 52 | 112 |
| Tue 8:45 pm | 155 | Unhealthy | 82.7 | 86 | 79 |
| Tue 11:45 pm | 153 | Unhealthy | 86.4 | 91 | 63 |
| Wed 2:45 am | 151 | Unhealthy | 68.7 | 73 | 43 |
| Wed 5:45 am | 151 | Unhealthy | 59 | 61 | 12 |
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 Janakpur today
Between 6 am and 9 pm local time, the cleanest air today is forecast around 10:45 am (AQI 142, Unhealthy for Sensitive Groups) and the worst around 9:45 pm (AQI 150). The difference across the day is small, so timing matters little.
Janakpur vs the rest of Nepal
Across 5 Nepal cities we track, the average US AQI right now is 91 (Moderate). Janakpur at 148 is 57 points worse than average.
For context, the median across 3,909 cities worldwide is 57.
Air quality in cities near Janakpur
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Darbhanga | 64 km | 154 | Unhealthy | 92.7 |
| Dhāka, Bihar | 76 km | 178 | Unhealthy | 134.6 |
| Muzaffarpur | 86 km | 161 | Unhealthy | 112 |
| Birgañj | 109 km | 119 | Unhealthy for Sensitive Groups | 43.4 |
| Pātan | 122 km | 92 | Moderate | 38.2 |
| Kathmandu | 124 km | 92 | Moderate | 38.2 |
| Patna | 149 km | 157 | Unhealthy | 100.8 |
| Bihār Sharīf | 175 km | 152 | Unhealthy | 75 |
Model vs measured
We found no measured PM2.5 sensor cell within 25 km of Janakpur, so the numbers on this page are model estimates. Models capture regional pollution well but can miss very local sources such as a busy road or a nearby fire.
Wildfire smoke
PM2.5 is forecast to reach 121 µg/m³ in the next 24 hours while NASA satellites detected 60 fire hotspots within 300 km in the last day (nearest about 26 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 148, children, older adults, pregnant people and anyone with asthma, COPD or heart disease should limit time outdoors, especially strenuous activity. A well-fitted N95/FFP2 mask cuts particle exposure; it does not filter ozone.
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 Janakpur
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), NASA FIRMS.