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Air quality · Rivers State, Nigeria

Port Harcourt Air Quality Index (AQI) today

Modelled estimate for 13:00 local time (UTC+1), refreshed 3 Nov, 07:52 UTC+0.

56 Moderate

Live estimate · modelled

US EPA AQI13:00 UTC+1, 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 73.

Over the next 24 hours the model expects the AQI to range from 52 around 17:00 to 155 around 23:00 (3 Nov).

555th most polluted of 849 cities worldwide right now, 22nd of 22 in Nigeria.

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

14:00 · 60 15:00 · 57 16:00 · 56 17:00 · 55 18:00 · 58 19:00 · 62 20:00 · 66 21:00 · 70 22:00 · 75 23:00 · 80 00:00 · 82 01:00 · 82 02:00 · 83 03:00 · 83 04:00 · 84 05:00 · 87 06:00 · 91 07:00 · 105 08:00 · 93 09:00 · 79 10:00 · 69 11:00 · 64 12:00 · 59 13:00 · 56 14:00 · 55 15:00 · 54 16:00 · 53 17:00 · 52 18:00 · 56 19:00 · 76 20:00 · 112 21:00 · 132 22:00 · 152 23:00 · 155 00:00 · 154 01:00 · 151 02:00 · 139 03:00 · 128 04:00 · 121 05:00 · 116 06:00 · 116 07:00 · 119 08:00 · 118 09:00 · 93 10:00 · 82 11:00 · 74 12:00 · 69 13:00 · 65 14:00 · 63 15:00 · 59 16:00 · 56 17:00 · 54 18:00 · 62 19:00 · 85 20:00 · 104 21:00 · 147 22:00 · 163 23:00 · 170 00:00 · 167 01:00 · 163 02:00 · 161 03:00 · 160 04:00 · 159 05:00 · 157 06:00 · 154 07:00 · 148 08:00 · 132 Now

US EPA AQI per hour, UTC+1. 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 14:0060
Mon 15:0057
Mon 16:0056
Mon 17:0055
Mon 18:0058
Mon 19:0062
Mon 20:0066
Mon 21:0070
Mon 22:0075
Mon 23:0080
Tue 00:0082
Tue 01:0082
Tue 02:0083
Tue 03:0083
Tue 04:0084
Tue 05:0087
Tue 06:0091
Tue 07:00105
Tue 08:0093
Tue 09:0079
Tue 10:0069
Tue 11:0064
Tue 12:0059
Tue 13:00 · Now56
Tue 14:00 · Forecast55
Tue 15:00 · Forecast54
Tue 16:00 · Forecast53
Tue 17:00 · Forecast52
Tue 18:00 · Forecast56
Tue 19:00 · Forecast76
Tue 20:00 · Forecast112
Tue 21:00 · Forecast132
Tue 22:00 · Forecast152
Tue 23:00 · Forecast155
Wed 00:00 · Forecast154
Wed 01:00 · Forecast151
Wed 02:00 · Forecast139
Wed 03:00 · Forecast128
Wed 04:00 · Forecast121
Wed 05:00 · Forecast116
Wed 06:00 · Forecast116
Wed 07:00 · Forecast119
Wed 08:00 · Forecast118
Wed 09:00 · Forecast93
Wed 10:00 · Forecast82
Wed 11:00 · Forecast74
Wed 12:00 · Forecast69
Wed 13:00 · Forecast65
Wed 14:00 · Forecast63
Wed 15:00 · Forecast59
Wed 16:00 · Forecast56
Wed 17:00 · Forecast54
Wed 18:00 · Forecast62
Wed 19:00 · Forecast85
Wed 20:00 · Forecast104
Wed 21:00 · Forecast147
Wed 22:00 · Forecast163
Wed 23:00 · Forecast170
Thu 00:00 · Forecast167
Thu 01:00 · Forecast163
Thu 02:00 · Forecast161
Thu 03:00 · Forecast160
Thu 04:00 · Forecast159
Thu 05:00 · Forecast157
Thu 06:00 · Forecast154
Thu 07:00 · Forecast148
Thu 08:00 · Forecast132

Pollutants this hour

  • PM2.5 10.3 µg/m³ 24-hour mean 20.8 µg/m³ · 1.4× WHO’s 24-hour guideline (15) 56
  • PM10 14 µg/m³ 14
  • O₃ 81 µg/m³ 27
  • NO₂ 2 µg/m³ 1
  • SO₂ 1 µg/m³ 0
  • CO 0.26 mg/m³ 2

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
Aba Abia State 64
Onitsha Anambra 75
Warri Delta 59
Enugu Enugu State 86
Benin City Edo State 64
Douala Cameroon 52
Akure Ondo State 63

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 Port Harcourt’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 Port Harcourt right now?
56 on the US EPA scale (Moderate) at 13:00 UTC+1, 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 Port Harcourt 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 Port Harcourt get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 52 around 17:00 to 155 around 23:00 (3 Nov). Forecasts beyond a day are less certain.

How does Port Harcourt compare with other cities?
Right now it is the 555th most polluted of 849 cities we track worldwide, and 22nd of 22 in Nigeria, all on the same US EPA scale.

Why does another app show a different AQI for Port Harcourt?
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.