Air Quality Index (AQI) in Palau 🇵🇼

Live Air Quality Index (AQI) and PM2.5 Levels in Palau

Currently, the Air Quality Index (AQI) in Ngerulmud, the capital of Palau, is measured at a score of 65. According to the US EPA health standard, this air quality rating is categorized as Moderate. The current atmosphere in Ngerulmud is influenced by a PM2.5 (fine particulate matter) concentration of 16.6 µg/m³ and PM10 levels recorded at 23.8 µg/m³. Monitoring of gaseous pollutants shows Nitrogen Dioxide (NO2) at 0.4 µg/m³.

Beyond the primary urban hubs, atmospheric conditions and smog levels fluctuate across Palau based on industrial output, traffic density, and local weather patterns. Real-time pollution data and respiratory health alerts are also being actively monitored in cities like Koror and Koror Town. Tracking these air quality metrics is essential for residents nationwide to manage outdoor exposure and maintain respiratory safety during periods of increased particulate concentration.

Air Quality Snapshot: Palau Right Now

Across 3 monitored cities in Palau, live air quality currently ranges from a low of 65 AQI in Ngerulmud (the cleanest air right now) to a high of 69 AQI in Koror (the most polluted). By US EPA health band, the nationwide distribution stands at 3 Moderate. The average fine-particulate (PM2.5) concentration across these cities is 18.2 µg/m³ — approximately 3.6 times the World Health Organization (WHO) annual air quality guideline of 5 µg/m³.

Palau Air Quality: Major Cities Index

Koror
2

Koror Town
2

Ngerulmud
2

* Air Quality Index (AQI) data for Palau is calculated using the US EPA standard. Information is processed from multiple monitoring stations detecting PM2.5, PM10, and gaseous pollutants to ensure accuracy for respiratory health planning.

What Today's Readings Mean in Palau

The median reading across 3 monitored cities is 69 AQI. The national spread is 4 points, from 65 in Ngerulmud to 69 in Koror. Average PM2.5 is 18.2 µg/m³ (3.6× the WHO annual guideline).

At least one monitored location is in the Moderate range. People unusually sensitive to air pollution may want to reduce prolonged outdoor exertion there.

See the complete AQI and pollutant reference scales

Health & Scientific Resources

→ How to read US EPA Air Quality Index before going outside → Understanding Air Quality Index levels and what they mean → When haze forms and what it does to air quality

Air Quality in Palau — FAQ

Common questions about AQI levels, pollutants, and data sources for Palau.

What is the current air quality in Palau?

Live AQI readings for 3 city(ies) across Palau are listed above on the US EPA 0-500 scale.

Where does Palau's AQI data come from?

Real-time readings come from ground-based monitoring stations operated by national environmental agencies in Palau, delivered via WeatherAPI.com and aggregated using the EPA AQI formula.

What is a healthy AQI value in Palau?

On the EPA scale used worldwide, 0-50 is Good, 51-100 is Moderate, 101-150 is Unhealthy for sensitive groups, 151-200 is Unhealthy, 201-300 is Very Unhealthy, and 301-500 is Hazardous. The WHO 24-hour PM2.5 guideline is 15 μg/m³.

Why do AQI readings vary between cities in Palau?

Air quality is highly local — major pollution sources (traffic, industry, dust, wildfires) cluster around cities, while wind direction and topography move them around. Comparing nearby readings on this page is the best way to see how conditions change across Palau.