Air quality in Hornsby
Estimate · no monitor hereSydney, New South Wales · estimated now from nearby government monitors
Estimated right now
Good · 33≈ 6.7 µg/m³ PM2.5 · cross-validated ±2.39 µg/m³
Interpolated from 5 monitors within 19 km (nearest 7.5 km). A monitor is close by, so this is reasonably representative of local conditions.
Nearest measurements
The monitors feeding this estimate — closer ones count for more.
- Macquarie Park · NSW 7.5 km 7.7 µg/m³ Good
- Parramatta North · NSW 14 km 7.9 µg/m³ Good
- Cammeray · NSW 18 km 1.2 µg/m³ Good
- Rouse Hill · NSW 18 km 0.3 µg/m³ Good
- Bradfield Highway · NSW 19 km 6.1 µg/m³ Good
Hornsby & nearby monitors
Coloured points are the monitors feeding the estimate.
How this estimate works: Hornsby has no air-quality monitor of its own, so we estimate PM2.5 by inverse-distance weighting the nearest official government monitors (closer monitors count for more), validated by leave-one-out cross-validation (±2.39 µg/m³). We show exactly which monitors fed the number and how far away they are. We never invent a reading for a place we can't measure.