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Hawaii Air Quality

Kailua-Kona is the worst air in Hawaii right now at an index of 52, which is Moderate, from fine particles (PM2.5). AirNow carries 12 reporting areas in the state. No air quality alert is in force.

Reporting areas: 12
Worst index now: 52
Alerts in force: 0
Towns under smoke: Unavailable

Radar

Reflectivity now over Hawaii. Open it to see the particulate forecast on the map.

Open the live radar with the particulate forecast

Radar mosaic and map layers from NOAA MRMS and NOAA National Air Quality Forecast Capability. Boundaries from the Iowa Environmental Mesonet.

Alerts in force

An Air Quality Alert is issued by the National Weather Service on behalf of a state or local agency when pollution is expected to reach a level that harms health. An Air Stagnation Advisory means the air will not move enough to clear what is already in it.

None are in force in Hawaii right now. All Hawaii warnings.

By city, now and the days ahead12

Every AirNow reporting area in Hawaii: what its monitors measured this hour, and what the state or local agency that forecasts for it expects today and tomorrow. Each area links to the nearest town’s page.

Reporting area	Now	Category now	Today	Tomorrow	Pollutant
Kailua-Kona	52	Moderate	Not forecast	Not forecast	PM2.5
Pahala	52	Moderate	Not forecast	Not forecast	PM2.5
Ocean View	48	Good	Not forecast	Not forecast	PM2.5
Keaau	32	Good	Not forecast	Not forecast	PM2.5
Honolulu	27	Good	Good	Not forecast	PM2.5
Kahului	24	Good	Not forecast	Not forecast	PM2.5
Kihei	22	Good	Not forecast	Not forecast	PM2.5
Naalehu	21	Good	Not forecast	Not forecast	PM2.5
Waikoloa	19	Good	Not forecast	Not forecast	PM2.5
Sand Island	17	Good	Not forecast	Not forecast	Ozone
Hilo	15	Good	Not forecast	Not forecast	PM2.5
Mountain View	12	Good	Not forecast	Not forecast	PM2.5

Smoke

NOAA’s Hazard Mapping System smoke analysis could not be read just now.

Smoke on the radar over Hawaii

What this means

The index runs from 0 to 500. Good is 0 to 50, Moderate to 100, Unhealthy for Sensitive Groups to 150, Unhealthy to 200, Very Unhealthy to 300, and Hazardous above that. The figure reported for a place is the highest index among the pollutants measured there, and the pollutant that produced it is named beside it.

What these numbers are. An index beside a monitor’s name is a measurement, published hourly by AirNow and preliminary until the operating agency certifies it. A category for today or tomorrow is a state or local agency forecaster’s own forecast for a reporting area. An hourly index is NOAA’s air quality model on a five-kilometer grid, not a reading from any instrument. Where a town has no monitor within reach, only the model figures appear, and the page says so.

Towns

Air quality for any town in Hawaii: what is measured nearby, the category forecast for today and tomorrow, and NOAA’s model hour by hour. Largest first.

44 smaller towns

Smaller places have pages too; search for one on the air quality landing page.

Sources

Observations and daily forecasts from AirNow, the US Environmental Protection Agency’s program with NOAA, the National Park Service, NASA, tribal, state and local agencies. Hourly forecasts from NOAA’s National Air Quality Forecast Capability. Smoke analysis from NOAA’s Hazard Mapping System. Alerts from the National Weather Service. Index categories and breakpoints are EPA’s, as revised in 2024.