Maui, Hawaii Air Quality
Maui County, Hawaii (HI)
↓ Improvingover 10 years
10-Year AQI Trend
The solid line shows the median AQI each year. The dashed line shows the 90th percentile (worst 10% of days). This area has seen measurable air quality improvement over the decade.
Air Quality Day Breakdown
Number of days per year in each EPA AQI category. Green = Good (AQI 0-50), Yellow = Moderate (51-100), Orange = Unhealthy for Sensitive Groups (101-150), Red = Unhealthy or worse (151+).
Year-by-Year Data
| Year | Median AQI | 90th Pct | Max AQI | Good Days | Moderate | Unhealthy+ | Pollutant |
|---|---|---|---|---|---|---|---|
| 2023 | 20 | 33 | 152 | 344 | 2 | 1 | PM2.5 |
| 2022 | 21 | 34 | 58 | 357 | 4 | 0 | PM2.5 |
| 2021 | 21 | 31 | 63 | 361 | 2 | 0 | PM2.5 |
| 2020 | 21 | 31 | 61 | 343 | 6 | 0 | PM2.5 |
| 2019 | 20 | 39 | 171 | 339 | 19 | 4 | PM2.5 |
| 2018 | 25 | 39 | 76 | 347 | 14 | 0 | PM2.5 |
| 2017 | 28 | 48 | 88 | 332 | 32 | 0 | PM2.5 |
| 2016 | 28 | 51 | 130 | 324 | 41 | 1 | PM2.5 |
| 2015 | 33 | 53 | 77 | 310 | 55 | 0 | PM2.5 |
| 2014 | 29 | 51 | 136 | 305 | 35 | 1 | PM2.5 |
What This Means for Maui County Residents
Maui, Hawaii has received an Air Quality Grade of A (84/100) based on a decade of EPA monitoring data. The current median AQI of 20 falls in the "Good" range.
Encouragingly, air quality here has been improving, with the median AQI dropping by 9 points over the monitoring period. This trend suggests continued investment in emission controls and cleaner energy.
The primary pollutant affecting this area is Fine Particulate Matter (PM2.5). Over the past 5 years, this area has averaged 1 unhealthy air quality days per year — days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity.