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Air quality · Santiago Province, Dominican Republic

Santiago de los Caballeros Air Quality Index (AQI) today

Modelled estimate for 09:00 local time (UTC-4), refreshed 3 Nov, 07:52 UTC+0.

53 Moderate

Live estimate · modelled

US EPA AQI09:00 UTC-4, 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 47.

Over the next 24 hours the model expects the AQI to range from 42 around 21:00 to 52 around 10:00 (3 Nov).

609th most polluted of 849 cities worldwide right now, 2nd of 2 in Dominican Republic.

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

10:00 · 28 11:00 · 28 12:00 · 27 13:00 · 26 14:00 · 26 15:00 · 29 16:00 · 31 17:00 · 31 18:00 · 34 19:00 · 47 20:00 · 53 21:00 · 55 22:00 · 55 23:00 · 54 00:00 · 54 01:00 · 54 02:00 · 54 03:00 · 53 04:00 · 53 05:00 · 52 06:00 · 52 07:00 · 52 08:00 · 52 09:00 · 53 10:00 · 52 11:00 · 52 12:00 · 52 13:00 · 51 14:00 · 50 15:00 · 48 16:00 · 45 17:00 · 44 18:00 · 48 19:00 · 52 20:00 · 48 21:00 · 42 22:00 · 43 23:00 · 45 00:00 · 47 01:00 · 46 02:00 · 45 03:00 · 44 04:00 · 43 05:00 · 42 06:00 · 42 07:00 · 45 08:00 · 52 09:00 · 49 10:00 · 47 11:00 · 47 12:00 · 48 13:00 · 48 14:00 · 48 15:00 · 51 16:00 · 52 17:00 · 53 18:00 · 54 19:00 · 53 20:00 · 53 21:00 · 54 22:00 · 54 23:00 · 55 00:00 · 56 01:00 · 56 02:00 · 55 03:00 · 55 Now

US EPA AQI per hour, UTC-4. 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 10:0028
Mon 11:0028
Mon 12:0027
Mon 13:0026
Mon 14:0026
Mon 15:0029
Mon 16:0031
Mon 17:0031
Mon 18:0034
Mon 19:0047
Mon 20:0053
Mon 21:0055
Mon 22:0055
Mon 23:0054
Tue 00:0054
Tue 01:0054
Tue 02:0054
Tue 03:0053
Tue 04:0053
Tue 05:0052
Tue 06:0052
Tue 07:0052
Tue 08:0052
Tue 09:00 · Now53
Tue 10:00 · Forecast52
Tue 11:00 · Forecast52
Tue 12:00 · Forecast52
Tue 13:00 · Forecast51
Tue 14:00 · Forecast50
Tue 15:00 · Forecast48
Tue 16:00 · Forecast45
Tue 17:00 · Forecast44
Tue 18:00 · Forecast48
Tue 19:00 · Forecast52
Tue 20:00 · Forecast48
Tue 21:00 · Forecast42
Tue 22:00 · Forecast43
Tue 23:00 · Forecast45
Wed 00:00 · Forecast47
Wed 01:00 · Forecast46
Wed 02:00 · Forecast45
Wed 03:00 · Forecast44
Wed 04:00 · Forecast43
Wed 05:00 · Forecast42
Wed 06:00 · Forecast42
Wed 07:00 · Forecast45
Wed 08:00 · Forecast52
Wed 09:00 · Forecast49
Wed 10:00 · Forecast47
Wed 11:00 · Forecast47
Wed 12:00 · Forecast48
Wed 13:00 · Forecast48
Wed 14:00 · Forecast48
Wed 15:00 · Forecast51
Wed 16:00 · Forecast52
Wed 17:00 · Forecast53
Wed 18:00 · Forecast54
Wed 19:00 · Forecast53
Wed 20:00 · Forecast53
Wed 21:00 · Forecast54
Wed 22:00 · Forecast54
Wed 23:00 · Forecast55
Thu 00:00 · Forecast56
Thu 01:00 · Forecast56
Thu 02:00 · Forecast55
Thu 03:00 · Forecast55

Pollutants this hour

  • PM2.5 10.4 µg/m³ 24-hour mean 8.5 µg/m³ · within WHO’s 24-hour guideline (15) 53
  • PM10 11 µg/m³ 9
  • O₃ 44 µg/m³ 8
  • NO₂ 11 µg/m³ 5
  • SO₂ 4 µg/m³ 1
  • CO 0.25 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
Santo Domingo Nacional 56
Port-au-Prince Haiti 112
San Juan Puerto Rico 33
Kingston Jamaica 32
Maracaibo Venezuela 41
Barranquilla Colombia 50
Barquisimeto Venezuela 37

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 Santiago de los Caballeros’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 Santiago de los Caballeros right now?
53 on the US EPA scale (Moderate) at 09:00 UTC-4, 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 Santiago de los Caballeros 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 Santiago de los Caballeros get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 42 around 21:00 to 52 around 10:00 (3 Nov). Forecasts beyond a day are less certain.

How does Santiago de los Caballeros compare with other cities?
Right now it is the 609th most polluted of 849 cities we track worldwide, and 2nd of 2 in Dominican Republic, all on the same US EPA scale.

Why does another app show a different AQI for Santiago de los Caballeros?
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.