Puerto Rico Air Quality
Catano is the worst air in Puerto Rico right now at an index of 16, which is Good, from fine particles (PM2.5). AirNow carries 1 reporting area in the state. No air quality alert is in force.
- Reporting areas
- 1
- Worst index now
- 16
- Alerts in force
- 0
- Towns under smoke
- 0
Fine particles on the map
Forecast fine particulate matter from NOAA’s National Air Quality Forecast Capability over Puerto Rico. Open it for the live map, where it pans and zooms.
Open the live map with the particulate forecast
Map layer from 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 Puerto Rico right now. All Puerto Rico warnings.
By city, now and the days ahead1
Every AirNow reporting area in Puerto Rico: 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 |
|---|---|---|---|---|---|
| Catano | 16 | Good | Not forecast | Not forecast | PM2.5 |
Smoke
NOAA’s analysts have not drawn wildfire smoke over any town in Puerto Rico today.
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
No towns are listed for this state.
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.