Air quality in Hilton Head Island estimated
South Carolina, United States. No ground monitor we can use is in this city, so these numbers are model estimates, not measurements.
≈ 6 µg/m³
Good
Estimated PM2.5, 7-day average to 2026-09-30, about 0.4× the WHO 24-hour guideline. 30-day average ≈ 8 µg/m³.
Model estimate from the Copernicus Atmosphere Monitoring Service (CAMS), scaled by 1.20 to match 10 measured cities within 300 km over the last week. Adjusted this way, a single day lands within ×1.5 of what a monitor would read about two times in three: a guide, not a measurement. Not ranked on SmogRank's boards.
Last 30 days, estimated
Daily means, UTC days. Dashed line: WHO 24-hour guideline (15 µg/m³).
Measured cities nearby
| City | Distance | 7-day average |
|---|---|---|
| Savannah | 36 km | 7.8 µg/m³ |
| North Charleston | 103 km | 7.9 µg/m³ |
| Brunswick | 136 km | 7.0 µg/m³ |
| Augusta | 183 km | 7.7 µg/m³ |
| Saint Andrews | 208 km | 5.6 µg/m³ |
| Jacksonville | 225 km | 7.1 µg/m³ |
Estimates contain modified Copernicus Atmosphere Monitoring Service information 2026. How estimates are made.