Discovery Harbour, Hawaii Air Quality
Discovery Harbour air quality today — the AQI, the main pollutant, and whether it’s safe to exercise outside right now
Discovery Harbour, HI · Air quality right now
The air quality index in Discovery Harbour, HI is 26 (Good) right now — safe for outdoor activity.
Is it safe to be outside in Discovery Harbour today?
AQI 26 Yes — air quality is Good
Air is clean — great for outdoor activity.Main pollutant: PM2.5Observed 5:00 AM HST
Pollutants right now
- PM2.52.2 µg/m³Main pollutantfine particles — smoke, exhaust, soot
- PM103.5 µg/m³coarse particles — dust, pollen, ash
- Ozone31 µg/m³smog — builds on hot, sunny days
- NO₂1.1 µg/m³nitrogen dioxide — traffic, combustion
ExerciseOK to run — no air-quality limits on outdoor exercise.
How to read Discovery Harbour’s air quality
Guides: The AQI Scale, Explained · Air Quality Alerts, Decoded · How to Read a Wildfire Smoke Map · Why Wildfire Smoke Travels 1,000 Miles.
Air quality over time in Discovery Harbour
Across the EPA’s county records from 2020 to 2025, Discovery Harbour’s cleanest year was 2024 (median AQI 21) and its most polluted was 2022 (median AQI 33); the typical (median) day has trended cleaner since 2020.
| Year | Median AQI | Unhealthy+ | Main pollutant | USG | Moderate | Good |
|---|---|---|---|---|---|---|
| 2020 | 23 | 0 | PM2.5 | 0 | 14 | 352 |
| 2021 | 27 | 0 | PM2.5 | 0 | 29 | 336 |
| 2022 | 33 | 0 | PM2.5 | 0 | 37 | 328 |
| 2023 | 23 | 0 | PM2.5 | 0 | 29 | 336 |
| 2024 | 21 | 0 | PM2.5 | 0 | 11 | 355 |
| 2025 | 32 | 0 | PM2.5 | 0 | 51 | 314 |
“USG” is Unhealthy for Sensitive Groups (AQI 101–150); “Unhealthy+” combines the Unhealthy, Very Unhealthy, and Hazardous days. In 2024 the EPA tightened the annual fine-particle (PM2.5) standard to 9 µg/m³ from the previous 12 µg/m³, so counties near the old limit read worse against the new one. Source: EPA AQS annual summaries, 2020–2025.
Frequently asked
- What was the worst year for air quality in Discovery Harbour?
- No day in Discovery Harbour's county topped AQI 100 in the EPA's 2020–2025 records. The highest median AQI came in 2022, at 33.
- How many unhealthy air days does Discovery Harbour have?
- None: across 2020–2025, no day in Discovery Harbour's county had an AQI above 100 in the EPA's records (2192 days reported).
- What's the main air pollutant in Discovery Harbour?
- PM2.5: it drove Discovery Harbour's county AQI on the most days in every year of the EPA's 2020–2025 records.