Web Soil Survey is unavailable nightly between 1:00 AM and 5:00 AM Eastern time for soil survey data updates.
Web Soil Survey may be unavailable on Tuesdays and Thursdays between 8:00 PM and 10:30 PM Eastern time for scheduled maintenance and software updates.
Web Soil Survey may also be unavailable the third weekend of each month, and the second Sunday of each month, for scheduled maintenance.
It may also be necessary from time to time to bring Web Soil Survey down for unscheduled maintenance.