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For an overview of other articles about water, see water.


Dirty water is a consumable item in Fallout 4.


A carton of plain river water, contaminated by radioactive fallout. Typically one would only drink this in an emergency.

At a cooking station, dirty water can be used to make various stews and soups, when combined with other ingredients. Three cartons of dirty water can also be turned into one purified water. At a chemistry station, dirty water is used in the construction of the berserk syringe and lock Joint syringe ammunition for the syringer.



Survival mode

In Survival mode, dirty water can reduce the Sole Survivor's thirst, though at the cost of increasing radiation and increasing the risk of contracting disease. Cartons of dirty water can be created by using the "Fill Bottle" option if one is next to a water source (river, sea, lake, pond, puddle of stagnant water, or contaminated water fountain) and if the player character has one or more empty bottles in their inventory. One can also player drink directly from the water source.


  • Dirty water is less common throughout the Commonwealth than purified water. It can only be created by filling empty glass bottles at a water source.
    • Glass bottles are consumed in this "filling" process. Empty bottles are not recovered after the dirty water is consumed.
  • In a non-Survival game, cartons of dirty water are 58.3% less radioactive than dirty water drunk directly from an open water source.
    • Drinking directly from a source grants the player character 3 rads and 5 HP, so a proportional amount needed to heal as much as the dirty water item itself (20 HP) would inflict 12 rads.
    • This relationship may not hold in Survival mode, where water does not heal, and the thirst quenching value of a carton of dirty water is a relatively low five units.