What do min, max, and average mean here?

These are pollutant sub-index values for the monitoring station as held in DeshSeva. They are not the same as a single composite National AQI headline number; readings are per pollutant (e.g. PM2.5, PM10).

Where does this data come from?

DeshSeva can sync snapshots into our database on a schedule; otherwise this page may fetch live readings depending on setup.

Why do some values show NA?

When a pollutant is not reported or not available for that interval, the source may publish NA for min, max, or average.

Home / Air quality (real-time) / TamilNadu / Coimbatore / PSG College of Arts and Science, Coimbatore - TNPCB

PSG College of Arts and Science, Coimbatore - TNPCB

Coimbatore, TamilNadu. Readings are pollutant sub-indices (min / max / average) from the CPCB monitoring network—not a single composite national AQI headline.

Last update (source): 12-04-2026 19:00:00 · Coordinates: 11.0328, 77.0349

Showing data from our last import: 2026-04-12 14:32:39.

Pollutant	Min	Max	Average
NH3	1	1	1
NO2	10	11	10
OZONE	3	7	6
PM10	40	76	59
PM2.5	51	99	76
SO2	3	18	9

FAQ

What do min, max, and average mean here?: These are pollutant sub-index values for the monitoring station as held in DeshSeva. They are not the same as a single composite National AQI headline number; readings are per pollutant (e.g. PM2.5, PM10).
Where does this data come from?: DeshSeva can sync snapshots into our database on a schedule; otherwise this page may fetch live readings depending on setup.
Why do some values show NA?: When a pollutant is not reported or not available for that interval, the source may publish NA for min, max, or average.

For methodology and official readings, see CPCB.