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FalloutShelterAppleStoreLogo.pngThe following is based on information from Fallout Shelter or Fallout Shelter Online.

The water treatment is a room built in Fallout Shelter.


The water treatment room creates water for your vault, and is affected by the Perception stat of the vault dwellers working there. It is one of the facilities available at the start of the game.

Water production

To increase the speed at which water is produced; Place dwellers with better Perception in this room.

Your water demand will go up the more dwellers you have. If its supply runs low, dwellers will start to become irradiated.


The water treatment, like other rooms, gains a production bonus from being connected to another of the same type and level. The room will gain a +2 production bonus for each connected room. Upgrade costs will be 25% cheaper for a double room and about 34% cheaper when upgrading a triple room vs upgrading 3 single rooms.

Single Room Double Room Triple Room
Water Treatment Output 8 18 28
Water Treatment Storage 50 100 150
Water Treatment Station Upgrade Cost 250 375 500
Water Treatment Station Output 10 22 34
Water Treatment Station Storage 75 150 225
Water Treatment Plant Upgrade Cost 750 1125 1500
Water Treatment Plant Output 12 26 40
Water Treatment Plant Storage 100 200 300


Being the Tier I room for water production, the water treatment facility becomes obsolete once the Water purification room is unlocked at 80 dwellers, which subsequently becomes obsolete once the Nuka-Cola bottler is unlocked at 100 dwellers.