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Air quality · San Salvador Department, El Salvador

San Salvador Air Quality Index (AQI) today

Modelled estimate for 06:00 local time (UTC-6), refreshed 3 Nov, 07:52 UTC+0.

53 Moderate

Live estimate · modelled

US EPA AQI06:00 UTC-6, 3 Nov Main pollutant: PM2.5

Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.

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 51.

Over the next 24 hours the model expects the AQI to range from 30 around 05:00 to 85 around 22:00 (3 Nov).

615th most polluted of 849 cities worldwide right now.

What to do today

  • Long walk or run outside OK, lighter if very sensitive
  • Kids playing outside OK
  • Airing the house Open
  • Mask outdoors Not needed

Based on the US EPA’s health statement: “Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.” General guidance, not medical advice.

Last 24 hours and next 48

Past hours Forecast

07:00 · 60 08:00 · 56 09:00 · 44 10:00 · 32 11:00 · 25 12:00 · 25 13:00 · 30 14:00 · 35 15:00 · 39 16:00 · 41 17:00 · 42 18:00 · 52 19:00 · 57 20:00 · 59 21:00 · 62 22:00 · 64 23:00 · 66 00:00 · 64 01:00 · 54 02:00 · 46 03:00 · 42 04:00 · 44 05:00 · 48 06:00 · 53 07:00 · 56 08:00 · 56 09:00 · 54 10:00 · 49 11:00 · 43 12:00 · 39 13:00 · 40 14:00 · 45 15:00 · 50 16:00 · 54 17:00 · 51 18:00 · 57 19:00 · 64 20:00 · 71 21:00 · 79 22:00 · 85 23:00 · 79 00:00 · 69 01:00 · 61 02:00 · 56 03:00 · 51 04:00 · 37 05:00 · 30 06:00 · 33 07:00 · 43 08:00 · 46 09:00 · 48 10:00 · 49 11:00 · 48 12:00 · 47 13:00 · 46 14:00 · 54 15:00 · 67 16:00 · 71 17:00 · 67 18:00 · 58 19:00 · 61 20:00 · 64 21:00 · 65 22:00 · 58 23:00 · 46 00:00 · 33 01:00 · 24 Now

US EPA AQI per hour, UTC-6. 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 07:0060
Mon 08:0056
Mon 09:0044
Mon 10:0032
Mon 11:0025
Mon 12:0025
Mon 13:0030
Mon 14:0035
Mon 15:0039
Mon 16:0041
Mon 17:0042
Mon 18:0052
Mon 19:0057
Mon 20:0059
Mon 21:0062
Mon 22:0064
Mon 23:0066
Tue 00:0064
Tue 01:0054
Tue 02:0046
Tue 03:0042
Tue 04:0044
Tue 05:0048
Tue 06:00 · Now53
Tue 07:00 · Forecast56
Tue 08:00 · Forecast56
Tue 09:00 · Forecast54
Tue 10:00 · Forecast49
Tue 11:00 · Forecast43
Tue 12:00 · Forecast39
Tue 13:00 · Forecast40
Tue 14:00 · Forecast45
Tue 15:00 · Forecast50
Tue 16:00 · Forecast54
Tue 17:00 · Forecast51
Tue 18:00 · Forecast57
Tue 19:00 · Forecast64
Tue 20:00 · Forecast71
Tue 21:00 · Forecast79
Tue 22:00 · Forecast85
Tue 23:00 · Forecast79
Wed 00:00 · Forecast69
Wed 01:00 · Forecast61
Wed 02:00 · Forecast56
Wed 03:00 · Forecast51
Wed 04:00 · Forecast37
Wed 05:00 · Forecast30
Wed 06:00 · Forecast33
Wed 07:00 · Forecast43
Wed 08:00 · Forecast46
Wed 09:00 · Forecast48
Wed 10:00 · Forecast49
Wed 11:00 · Forecast48
Wed 12:00 · Forecast47
Wed 13:00 · Forecast46
Wed 14:00 · Forecast54
Wed 15:00 · Forecast67
Wed 16:00 · Forecast71
Wed 17:00 · Forecast67
Wed 18:00 · Forecast58
Wed 19:00 · Forecast61
Wed 20:00 · Forecast64
Wed 21:00 · Forecast65
Wed 22:00 · Forecast58
Wed 23:00 · Forecast46
Thu 00:00 · Forecast33
Thu 01:00 · Forecast24

Pollutants this hour

  • PM2.5 11.5 µg/m³ 24-hour mean 9.4 µg/m³ · within WHO’s 24-hour guideline (15) 53
  • PM10 12 µg/m³ 9
  • O₃ 14 µg/m³ 7
  • NO₂ 18 µg/m³ 8
  • SO₂ 3 µg/m³ 1
  • CO 0.62 mg/m³ 5

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
Guatemala City Guatemala 62
Tegucigalpa Honduras 34
San Pedro Sula Honduras 67
Managua Nicaragua 17
Tuxtla Mexico 53
San José Costa Rica 46
Mérida Mexico 54

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 San Salvador’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 San Salvador right now?
53 on the US EPA scale (Moderate) at 06:00 UTC-6, 3 Nov. PM2.5 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 San Salvador today?
For most people, yes. The EPA’s statement for “Moderate”: Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. General guidance, not medical advice.

Will the air in San Salvador get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 30 around 05:00 to 85 around 22:00 (3 Nov). Forecasts beyond a day are less certain.

How does San Salvador compare with other cities?
Right now it is the 615th most polluted of 849 cities we track worldwide, all on the same US EPA scale.

Why does another app show a different AQI for San Salvador?
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.