The higher the AQI value, the higher the level of air pollution and the greater the health risk. AQI is divided into six categories. Each category corresponds to a different level of health risk.
Good: Air quality is considered satisfactory, and air pollution poses little or no risk.
Moderate: Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
Unhealthy for Sensitive Groups: Members of sensitive groups may experience health effects. The general public is not likely to be affected.
Unhealthy: Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.
Very Unhealthy: Health warnings of emergency conditions. The entire population is more likely to be affected.
Hazardous: Health alert: everyone may experience more serious health effects
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Browsing our map is very easy. All maps layers can be displayed by expanding the menu in the upper right corner of the map.
You can search for places and locations with Free-map.org. By clicking on the search map layer icon, the "enter address" field will be expanded, in which, after entering a specific address and pressing enter, the searched place will be displayed on the map.
Free-map.org has Geolocation feature. It is disabled by default. It can be activated by clicking on the marker icon in the upper left corner of the map, under the search and measurement tools. When the feature is active, , the blue point shows your approximate location and the map is automatically centered to that point. The location is refreshed automatically every few seconds.
The map includes a route planning option and allows the optimal route to be mapped between selected points. You can choose to plan your route by car , bicycle or on foot . The beginning and end of the route can be indicated on the map by clicking the right mouse button. You can also enter the start and end of your route in the panel that opens after clicking the route icon . It is possible to add intermediate points, either by designating them on the map or by adding the address in the drop-down panel.
There is also Measurement tool , that allows you to measure the distance between the points indicated on the map. .
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