Troubled Waters

Troubled Waters is a quest in Fallout 4.

Detailed walkthrough
Meet Supervisor White at Graygarden and talk to her to initiate the quest. Head across the river to the Weston water treatment plant. It is guarded by super mutants, and is often the target of a Brotherhood Vertibird raid so be prepared. Kill all Super Mutants guarding the plant.

Enter the plant via the main doors, and go down to basement via the elevator. This area is inhabitted by mirelurks and 10 Machine gun turrets, however the turrets can be switched off from a single terminal in a room not far from the entrance to the main area.

There are 5 circuit breakers located throughout the facility, 4 Auxilary Pumps that will lower the water level and 1 main pump that will restore water to Greygarden.

After draining the facility, report back to Supervisor White.