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. The outside of the plant is guarded by super mutants, including a super mutant suicider, super mutant skirmisher, and hounds, 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 inhabited by mirelurks and ten 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 five circuit breakers located throughout the facility and four auxiliary pumps that will lower the water level. The main pump will restore water to Greygarden.

After draining the facility, report back to Supervisor White.