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Air quality · Maseru District, Lesotho

Maseru Air Quality Index (AQI) today

Modelled estimate for 15:00 local time (UTC+2), refreshed 3 Nov, 07:52 UTC+0.

42 Good

Live estimate · modelled

US EPA AQI15:00 UTC+2, 3 Nov Main pollutant: O₃

Air quality is satisfactory, and air pollution poses little or no risk.

This page uses EPA’s NowCast, which follows the last few hours, as the US government’s AirNow does. On a 24-hour average of particles, as many apps show, it is 43.

Over the next 24 hours the model expects the AQI to range from 37 around 21:00 to 57 around 10:00 (4 Nov).

695th most polluted of 849 cities worldwide right now.

What to do today

  • Long walk or run outside OK
  • Kids playing outside OK
  • Airing the house Open
  • Mask outdoors Not needed

Based on the US EPA’s health statement: “Air quality is satisfactory, and air pollution poses little or no risk.” General guidance, not medical advice.

Last 24 hours and next 48

Past hours Forecast

16:00 · 42 17:00 · 41 18:00 · 40 19:00 · 39 20:00 · 37 21:00 · 40 22:00 · 50 23:00 · 54 00:00 · 58 01:00 · 60 02:00 · 61 03:00 · 60 04:00 · 59 05:00 · 58 06:00 · 56 07:00 · 52 08:00 · 41 09:00 · 35 10:00 · 31 11:00 · 31 12:00 · 34 13:00 · 38 14:00 · 40 15:00 · 42 16:00 · 43 17:00 · 43 18:00 · 43 19:00 · 41 20:00 · 39 21:00 · 37 22:00 · 39 23:00 · 43 00:00 · 46 01:00 · 49 02:00 · 50 03:00 · 51 04:00 · 51 05:00 · 52 06:00 · 54 07:00 · 54 08:00 · 55 09:00 · 56 10:00 · 57 11:00 · 57 12:00 · 56 13:00 · 55 14:00 · 51 15:00 · 48 16:00 · 50 17:00 · 50 18:00 · 49 19:00 · 46 20:00 · 52 21:00 · 55 22:00 · 57 23:00 · 56 00:00 · 55 01:00 · 53 02:00 · 52 03:00 · 52 04:00 · 53 05:00 · 53 06:00 · 54 07:00 · 54 08:00 · 56 09:00 · 59 Now

US EPA AQI per hour, UTC+2. Particles use EPA’s NowCast (a 12-hour weighted average), ozone and CO an 8-hour average. Lighter bars are the CAMS forecast.

Show as a table
TimeAQI
Mon 16:0042
Mon 17:0041
Mon 18:0040
Mon 19:0039
Mon 20:0037
Mon 21:0040
Mon 22:0050
Mon 23:0054
Tue 00:0058
Tue 01:0060
Tue 02:0061
Tue 03:0060
Tue 04:0059
Tue 05:0058
Tue 06:0056
Tue 07:0052
Tue 08:0041
Tue 09:0035
Tue 10:0031
Tue 11:0031
Tue 12:0034
Tue 13:0038
Tue 14:0040
Tue 15:00 · Now42
Tue 16:00 · Forecast43
Tue 17:00 · Forecast43
Tue 18:00 · Forecast43
Tue 19:00 · Forecast41
Tue 20:00 · Forecast39
Tue 21:00 · Forecast37
Tue 22:00 · Forecast39
Tue 23:00 · Forecast43
Wed 00:00 · Forecast46
Wed 01:00 · Forecast49
Wed 02:00 · Forecast50
Wed 03:00 · Forecast51
Wed 04:00 · Forecast51
Wed 05:00 · Forecast52
Wed 06:00 · Forecast54
Wed 07:00 · Forecast54
Wed 08:00 · Forecast55
Wed 09:00 · Forecast56
Wed 10:00 · Forecast57
Wed 11:00 · Forecast57
Wed 12:00 · Forecast56
Wed 13:00 · Forecast55
Wed 14:00 · Forecast51
Wed 15:00 · Forecast48
Wed 16:00 · Forecast50
Wed 17:00 · Forecast50
Wed 18:00 · Forecast49
Wed 19:00 · Forecast46
Wed 20:00 · Forecast52
Wed 21:00 · Forecast55
Wed 22:00 · Forecast57
Wed 23:00 · Forecast56
Thu 00:00 · Forecast55
Thu 01:00 · Forecast53
Thu 02:00 · Forecast52
Thu 03:00 · Forecast52
Thu 04:00 · Forecast53
Thu 05:00 · Forecast53
Thu 06:00 · Forecast54
Thu 07:00 · Forecast54
Thu 08:00 · Forecast56
Thu 09:00 · Forecast59

Pollutants this hour

  • PM2.5 2.8 µg/m³ 24-hour mean 7.9 µg/m³ · within WHO’s 24-hour guideline (15) 16
  • PM10 3 µg/m³ 3
  • O₃ 89 µg/m³ 42
  • NO₂ 1 µg/m³ 0
  • SO₂ 1 µg/m³ 0
  • CO 0.13 mg/m³ 1

Modelled concentrations at the city’s location (CAMS). The sub-index uses the same averaging as the headline, so the highest one is the AQI.

Nearby cities

City AQI
Pietermaritzburg South Africa 36
Evaton South Africa 80
Durban South Africa 36
Johannesburg South Africa 80
Benoni South Africa 97
Pretoria South Africa 74
Soshanguve South Africa 74

Where this number comes from

The Copernicus Atmosphere Monitoring Service (CAMS) forecasts air pollution worldwide on a grid (about 11 km over Europe, about 45 km elsewhere). We take the grid value at Maseru’s coordinates and score it with the US EPA’s method. It is a model, not a measurement: a nearby monitoring station can read quite differently, especially next to busy roads or during fires and dust storms.

Full methodology · Data: CAMS via Open-Meteo (CC BY 4.0); city list: GeoNames (CC BY 4.0).

  • Good 0–50
  • Moderate 51–100
  • Unhealthy for sensitive groups 101–150
  • Unhealthy 151–200
  • Very unhealthy 201–300
  • Hazardous 301–500

Questions

What is the AQI in Maseru right now?
42 on the US EPA scale (Good) at 15:00 UTC+2, 3 Nov. O₃ is the pollutant with the highest sub-index. This is a modelled estimate from the Copernicus Atmosphere Monitoring Service (CAMS), not a reading from a monitoring station.

Is it safe to exercise outside in Maseru today?
For most people, yes. The EPA’s statement for “Good”: Air quality is satisfactory, and air pollution poses little or no risk. General guidance, not medical advice.

Will the air in Maseru get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 37 around 21:00 to 57 around 10:00 (4 Nov). Forecasts beyond a day are less certain.

How does Maseru compare with other cities?
Right now it is the 695th most polluted of 849 cities we track worldwide, all on the same US EPA scale.

Why does another app show a different AQI for Maseru?
Apps differ in source (government stations, low-cost sensors or a model like this one), in scale (US EPA, European, or a national index) and in averaging (hourly or NowCast, 8-hour, 24-hour). This page uses the US EPA AQI with EPA’s NowCast for particles, computed from the CAMS forecast for the city’s location.