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Air quality in Semnan today

Iran · Updated Friday 08:30 (local time) · Model data from the Copernicus Atmosphere Monitoring Service

64

Poor European AQI

Consider less intense outdoor activity, especially if you have heart or lung conditions.

See Semnan breathe on the live map →

Pollutants right now

PollutantValueLevel
PM2.513 µg/m³Fair
PM1021 µg/m³Fair
NO₂7 µg/m³Good
O₃128 µg/m³Moderate

The pollutant that matters most in Semnan right now is O₃.

Forecast: next 24 hours

Over the next 24 hours the air in Semnan is expected to be worst around Fri 10:30 (AQI 82, very poor). The cleanest hour is expected around Sat 05:30.

Fri 09:30: AQI 77Fri 10:30: AQI 82Fri 11:30: AQI 82Fri 12:30: AQI 81Fri 13:30: AQI 81Fri 14:30: AQI 79Fri 15:30: AQI 78Fri 16:30: AQI 75Fri 17:30: AQI 72Fri 18:30: AQI 68Fri 19:30: AQI 65Fri 20:30: AQI 61Fri 21:30: AQI 52Fri 22:30: AQI 42Fri 23:30: AQI 36Sat 00:30: AQI 32Sat 01:30: AQI 30Sat 02:30: AQI 29Sat 03:30: AQI 28Sat 04:30: AQI 26Sat 05:30: AQI 23Sat 06:30: AQI 25Sat 07:30: AQI 34Sat 08:30: AQI 52Fri 09:30Fri 21:30Sat 08:30
TimeAQILevelPM2.5
Fri 09:3077Poor10
Fri 12:3081Very poor8
Fri 15:3078Poor9
Fri 18:3068Poor9
Fri 21:3052Moderate6
Sat 00:3032Fair4
Sat 03:3028Fair3
Sat 06:3025Fair5

The last 30 days

Over the last 30 days the average daily AQI in Semnan was 50, with 2 day(s) rated poor or worse. The cleanest day was 2 Sept, the most polluted 23 Sept.

30 Aug: AQI 4931 Aug: AQI 471 Sept: AQI 392 Sept: AQI 373 Sept: AQI 464 Sept: AQI 485 Sept: AQI 486 Sept: AQI 537 Sept: AQI 588 Sept: AQI 529 Sept: AQI 4610 Sept: AQI 4611 Sept: AQI 4812 Sept: AQI 4813 Sept: AQI 4714 Sept: AQI 4915 Sept: AQI 6316 Sept: AQI 5517 Sept: AQI 5418 Sept: AQI 5019 Sept: AQI 4720 Sept: AQI 5521 Sept: AQI 4622 Sept: AQI 5023 Sept: AQI 6430 Aug11 Sept23 Sept

Questions and answers

Is the air in Semnan good today?
Right now the European Air Quality Index in Semnan is 64, which is poor. Consider less intense outdoor activity, especially if you have heart or lung conditions.
What pollutes the air in Semnan?
At the moment O₃ contributes most to the air quality index in Semnan. The index takes the worst of fine particles (PM2.5), coarser particles (PM10), nitrogen dioxide, ozone and sulphur dioxide.
When will the air in Semnan be cleanest?
Over the next 24 hours the air in Semnan is expected to be worst around Fri 10:30 (AQI 82, very poor). The cleanest hour is expected around Sat 05:30.
Where does this data come from?
Wheezair shows model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), served by Open-Meteo: about 11 km resolution in Europe and 40 km elsewhere, updated daily. They are not station measurements, so a busy street can be worse than its city's value.

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