Air quality
Air quality in Bastī today
Updated
Unhealthy (US AQI 178) Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed. Model estimate for Mon, Oct 26, 6:30 am (01:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Bastī, Uttar Pradesh, India, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 178 Unhealthy
- PM2.5
- 146 µg/m³ 9.7× WHO 24-h guideline
- PM10
- 161 µg/m³
- Ozone
- 32 µg/m³
- Dominant pollutant
- PM2.5 sub-index 178
- Best hour today
- 6:30 am AQI 178
- European AQI
- 102
Air quality in Bastī right now
Right now the modelled US Air Quality Index for Bastī, Uttar Pradesh, India is 178, which falls in the "Unhealthy" band (up to 200). Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed.
The index is driven mainly by PM2.5, whose own sub-index is 178. 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 146 µg/m³, 9.7 times the WHO 24-hour guideline of 15 µg/m³; PM10 is 161 µg/m³ against a guideline of 45; ozone is 32 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 62 µg/m³ (above the 24-hour guideline of 25).
Also this hour: carbon monoxide 684 µg/m³.
Bastī AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 178 around Mon 6:30 am to 181 around Tue 4:30 am, staying "Unhealthy" throughout.
The following day looks similar, averaging about 176.
| Local time (Asia/Kolkata) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Mon 6:30 am | 178 | Unhealthy | 145.8 | 161 | 32 |
| Mon 9:30 am | 178 | Unhealthy | 75.4 | 92 | 131 |
| Mon 12:30 pm | 179 | Unhealthy | 44.8 | 58 | 188 |
| Mon 3:30 pm | 178 | Unhealthy | 37.7 | 48 | 153 |
| Mon 6:30 pm | 178 | Unhealthy | 71.9 | 80 | 75 |
| Mon 9:30 pm | 178 | Unhealthy | 121.5 | 132 | 25 |
| Tue 12:30 am | 179 | Unhealthy | 145.8 | 156 | 3 |
| Tue 3:30 am | 180 | Unhealthy | 143.9 | 153 | 0 |
| Tue 6:30 am | 181 | Unhealthy | 142.5 | 150 | 37 |
| Tue 9:30 am | 180 | Unhealthy | 53.1 | 60 | 144 |
| Tue 12:30 pm | 178 | Unhealthy | 32 | 38 | 185 |
| Tue 3:30 pm | 178 | Unhealthy | 31.1 | 36 | 160 |
| Tue 6:30 pm | 177 | Unhealthy | 66.1 | 70 | 80 |
| Tue 9:30 pm | 176 | Unhealthy | 104.3 | 108 | 31 |
| Wed 12:30 am | 174 | Unhealthy | 88.9 | 93 | 33 |
| Wed 3:30 am | 168 | Unhealthy | 69.8 | 74 | 44 |
| Wed 6:30 am | 161 | Unhealthy | 60.5 | 64 | 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 Bastī today
Between 6 am and 9 pm local time, the cleanest air today is forecast around 6:30 am (AQI 178, Unhealthy) and the worst around 10:30 am (AQI 179). The difference across the day is small, so timing matters little.
Bastī vs the rest of India
Across 260 India cities we track, the average US AQI right now is 116 (Unhealthy for Sensitive Groups). Bastī at 178 is 62 points worse than average.
For context, the median across 3,909 cities worldwide is 57.
Air quality in cities near Bastī
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Gorakhpur | 65 km | 172 | Unhealthy | 129 |
| Kushinagar | 116 km | 155 | Unhealthy | 87.5 |
| Gauriganj | 121 km | 173 | Unhealthy | 112.2 |
| Varanasi | 166 km | 154 | Unhealthy | 75.2 |
| Pandit Deen Dayal Upadhyaya Nagar | 172 km | 154 | Unhealthy | 75.2 |
| Prayagraj | 173 km | 179 | Unhealthy | 152.3 |
| Lucknow | 178 km | 161 | Unhealthy | 52.9 |
| Bharatpur | 197 km | 95 | Moderate | 38.5 |
Model vs measured
We found no measured PM2.5 sensor cell within 25 km of Bastī, 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 148 µg/m³ in the next 24 hours while NASA satellites detected 92 fire hotspots within 300 km in the last day (nearest about 48 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 178, 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 Bastī
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), NASA FIRMS.