Air quality
Air quality in Purnia today
Updated
Unhealthy for Sensitive Groups (US AQI 137) 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, 4:18 am (22:48 UTC).
Live AQI, PM2.5, PM10 and ozone for Purnia, Bihar, India, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 137 Unhealthy for Sensitive Groups
- PM2.5
- 72 µg/m³ 4.8× WHO 24-h guideline
- PM10
- 75 µg/m³
- Ozone
- 41 µg/m³
Air quality in Purnia right now
Right now the modelled US Air Quality Index for Purnia, Bihar, India is 137, 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.
PM2.5 is 72 µg/m³, 4.8 times the WHO 24-hour guideline of 15 µg/m³; PM10 is 75 µg/m³ against a guideline of 45; ozone is 41 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 21 µg/m³ (below the 24-hour guideline of 25).
Purnia vs the rest of India
Across 260 India cities we track, the average US AQI right now is 116 (Unhealthy for Sensitive Groups). Purnia at 137 is 21 points worse than average.
It ranks 165 of 260 from cleanest to most polluted; the cleanest is Dindigul (25) and the most polluted Karnāl (440).
For context, the median across 3,909 cities worldwide is 57.
Air quality in cities near Purnia
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Bhāgalpur | 78 km | 130 | Unhealthy for Sensitive Groups | 65 |
| Siliguri | 141 km | 91 | Moderate | 29.6 |
| Mohammadpur | 144 km | 132 | Unhealthy for Sensitive Groups | 53.9 |
| Darbhanga | 163 km | 153 | Unhealthy | 85.2 |
| Rangpur | 178 km | 114 | Unhealthy for Sensitive Groups | 43.5 |
| Rajshahi | 193 km | 115 | Unhealthy for Sensitive Groups | 49.8 |
| Shibganj | 205 km | 105 | Unhealthy for Sensitive Groups | 41.2 |
| Bihār Sharīf | 206 km | 151 | Unhealthy | 76.1 |
Model vs measured
We found no measured PM2.5 sensor cell within 25 km of Purnia, 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 72 µg/m³ in the next 24 hours while NASA satellites detected 276 fire hotspots within 300 km in the last day (nearest about 80 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 137, 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 Purnia
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), NASA FIRMS.