We'll set the language based on your device/browser settings.
Theme
Auto follows your device's light/dark setting. Smart adapts to ambient light where available, otherwise local time.
Wind Trail Length
How far back the wind trail is drawn on the map. Nearest-station matching always uses up to 12h of history regardless of this setting.
Show factories, power plants and landfills near you (OpenStreetMap data plus a hand-checked list). Off by default.
Show active wildfires detected by NASA satellite data (FIRMS) near you. Off by default.
Show the Trace Possible Source button on the map. Turn it on, then tap the map to see which reports' wind trails trace back to that point. Off by default.
Show the dashed wind-trail lines behind each pin. Off by default to keep the map uncluttered.
While using Trace Possible Source: purple at the tracer pin, fading to red then orange toward each matched report, then a yellow tail continuing ~5km further along the wind past the report -- brightening back toward orange wherever it crosses another report's trail.
A concentration heatmap: one weighted point per report, so brighter/redder areas mean more (and stronger, more recent) reports nearby. Off by default.
Source Heatmap
The source heatmap toggle above shows a plain concentration heatmap: one weighted point per report, so brighter/redder areas simply mean more (and stronger, more recent) reports nearby.
Time Window Filter0 Reports
GPS Not Enabled
Location access is turned off. To report bad air at your location, enable it in your settings.
Or use the button on the map to drop a pin manually.
