Today's guidance. Avoid outdoor exertion. Use a well-fitted N95 outdoors and run a purifier indoors if you have one.
What is coming
A modelled projection, not a measurement and not a CAQM declaration. It is aggregated the way CPCB defines the index — a 24-hour mean for PM and NO₂, an 8-hour maximum for ozone and CO — so it can be read against today's number.
By area
City trend · last 7 days
Daily average AQI across all reporting areas. Bars are coloured by CPCB band; a missing bar means no measurement was recorded that day.
Where it comes from
What is driving it right now
Ranked by CPCB sub-index from the latest hour's concentrations. The headline AQI uses 24-hour windows, so this is the shape of the problem rather than a restatement of that number.
Particles small enough to pass from the lungs into the blood. Comes from burning - waste, leaves, wood and coal - together with engine exhaust, industry and generator sets. In winter it is held close to the ground overnight instead of dispersing.
Coarser dust that settles in the nose and airways. Comes from road and construction dust: unswept and unpaved surfaces, uncovered material, demolition, and vehicles dragging silt onto the carriageway.
A combustion gas that inflames the airways. Comes from engines and boilers burning fuel - overwhelmingly traffic in a city, plus generator sets.
So this is what to look for
The pollutants above point at these activities. If you can see one happening near you, reporting it is the most direct thing you can do about the number at the top of this page.
What residents actually report here
2 reports in the last 90 days. This is observation by people on the street, not a measurement — but it is the only evidence here that names a specific activity at a specific place.
What is physically around you
Infrastructure in the civic asset register that bears on street-level air. Being near one of these is not evidence that it is polluting — it is a reason to look.
What the bands mean
| AQI | Band | What to do |
|---|---|---|
| 0–50 | Good | Air is clean. Normal outdoor activity is fine for everyone. |
| 51–100 | Satisfactory | Acceptable air. People unusually sensitive to pollution may feel minor discomfort. |
| 101–200 | Moderate | People with asthma, heart or lung conditions, children and older adults should cut down long outdoor exertion. |
| 201–300 | Poor | Most people feel breathing discomfort on long exposure. Avoid outdoor exercise and keep windows shut in the evening. |
| 301–400 | Very Poor | Avoid outdoor exertion. Use a well-fitted N95 outdoors and run a purifier indoors if you have one. |
| 401–500 | Severe | Serious health effect for everyone. Stay indoors, keep windows shut, and seek care for chest pain or breathlessness. |
Values follow the CPCB National Air Quality Index (2014 methodology): the index is the worst pollutant sub-index, and CPCB requires at least three pollutants including PM2.5 or PM10 before an AQI can be stated — which is why an area can show a dash rather than a number. The AQI and the pollutant numbers cover different periods: CPCB defines the index on a 24-hour average (8 hours for CO and ozone), while the PM figures are the latest hour, so a falling hour can sit under a still-high 24-hour index. Each reading carries a provenance label; only readings marked CPCB are official measurements. The guidance above is the public health advice attached to a band, not individual medical advice.