Tip
Many of the apps (i.e. Current Weather, Elevation, EPA Sites, etc) are location dependent (i.e. they require zip code or geographic coordinates). You can enter location information once for all apps by selecting the Location menu option that appears at the top of every page.

Location information entered via the Location menu option will expire after 20 minutes of inactivity. Location information entered directly into an app will be available only to that app, will not affect location information entered via the Location menu option and will persist only as long as the app persists.