As required by federal rule, the Department of Health (DOH) will notify the public of an exceedance of a National Ambient Air Quality Standard (NAAQS).
Click here to view the current list of exceedances (PDF).
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Except where indicated, the list shows an exceedance of a primary NAAQS standard.
A primary standard is health-based and represents a threshold below which health impacts are not expected.
Click here to see a current list of the NAAQS.
| SO2 |
Sulfur Dioxide |
O3 |
Ozone |
ppm |
parts per million |
| CO |
Carbon Monoxide |
H2S |
Hydrogen Sulfide |
ppb |
parts per billion |
| Pb |
Lead |
PM10 |
Particulate matter with diameter greater than or equal to 10 microns |
| NO2 |
Nitrogen Dioxide |
PM2.5 |
Particulate matter with diameter greater than or equal to 2.5 microns |
Please click on the following links to learn more about related topics:
Visit the Hawaii Air Quality Data Books page and select the most recent data book to learn more about DOH monitoring, air pollutants and the NAAQS.
View maps of the current locations of DOH air monitoring stations.
View Online Air Quality Data for Oahu and the Big Island. Please note that the data has not been validated for quality assurance and is provided for information only.
Learn more about air pollutants from Kilauea Volcano on the Big Island.
If you have any questions, please call the Clean Air Branch at (808)
586-4200.
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