SmogRank / World / Africa / Ghana / Greater Accra

Most polluted cities in Greater Accra, Ghana

2 measured cities, this year; 2 above the WHO annual guideline. Worst: Ashaiman at 29.7 µg/m³, #193 in the world.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.

VoltaCentralGreater Accra: 2 measured citiesAshantiEastern#2 Tema: 25.4 µg/m³#1 Ashaiman: 29.7 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
  1. 1Ashaimanlow-cost sensors 28%
  2. 2Temalow-cost sensors 18%

Low-cost sensors: consumer units, counted only in cities with no government-grade monitor; they read close to reference monitors on the whole, but 15 to 25% high in humid air. How we use them.

Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Estimated: cities without a monitor

Greater Accra cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.

City7-day estimateBand
Atsiaman≈ 12 µg/m³Moderate
Amanfrom≈ 12 µg/m³Moderate
Tema New Town≈ 11 µg/m³Moderate
Gbawe≈ 12 µg/m³Moderate
Mandela≈ 12 µg/m³Moderate
Lashibi≈ 11 µg/m³Moderate
Dome≈ 12 µg/m³Moderate
Taifa≈ 12 µg/m³Moderate
Sakumona≈ 11 µg/m³Moderate
Awoshi≈ 12 µg/m³Moderate

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SmogRank, most polluted cities in Greater Accra, Ghana, PM2.5, this year to 6 Oct 2026, 23:00 UTC, smogrank.com/gh/region/greater-accra?w=year.

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.

Updated 2026-10-06 23:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.