ATLANTA - Much of metro Atlanta is experiencing a water outage and a boil water advisory is in effect for the city of Atlanta.

Atlanta Watershed said the outage is citywide and also affects those customers in DeKalb County that are serviced by Atlanta Watershed.

The watershed commissioner said the boil advisory could last until Tuesday afternoon.

The department said it mistakenly sent an alert earlier Monday to Cobb, Gwinnett and DeKalb counties, but the advisory only impacts the areas in the map above.

Georgia State University tweeted that its downtown buildings were experiencing water outages just after 11 a.m., but service was restored 30 minutes later.

Until water is restored, Atlanta Public Schools said it will have bottled water and pre-packaged meals at all impacted schools. They're also asking parents to send their children to school with water.

The city of Atlanta Watershed Management website is experiencing technical difficulties due to high-volume traffic during the water pressure incident.

The city of Atlanta issued an alert on temporary low-water pressure issues.

Due to a control issue at the Hemphill Pump Station, the Hemphill Zone was experiencing no water and very low pressures throughout the zone.

The Department of Watershed Management called for immediate water restriction to allow the pressure to rebuild in the system once the pumps are restored to service.

According to the city of Atlanta's website, Hemphill supplies approximately 65 percent of all drinking water consumed by Atlanta residents.

The city’s oldest and largest water treatment facility, Hemphill produces more than 136 million gallons of water daily for distribution to residential, commercial, and industrial customers within the city of Atlanta, portions of Fulton County south of the Chattahoochee River and south Fulton County.