The Vault - Fallout Wiki

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The Vault - Fallout Wiki
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For the various forms of water that appear in the Fallout series, see water.
Aqua Pura
FO3BS aqua pura.png
Icon water.png
+20 Hit Points
Increasing negative effects if infected with Modified FEV
Base IDxx00104f
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Aqua Pura is a consumable item in the Fallout 3 add-on, Broken Steel.


Aqua Pura, literally "pure water", is the result of Project Purity finally becoming functional after many years of being defunct. Taken from the Potomac River Tidal Basin, the water has been cleansed of its radioactivity by the now active purifier located inside the Jefferson Memorial.


If the water is not infected with the modified FEV, then Aqua Pura is just normal, filtered water that restores +20 hit points, identical to purified water.

Effects of modified FEV

Drinking the water after choosing to infect it with the modified FEV will result in an additional player debuff effect and, if consumed in large enough quantities will cause death. The reason for this danger is the fact that the Lone Wanderer was actually born outside of a Vault and thus he or she is not immune against the modified FEV, which was designed to kill anyone who had prolonged exposure to the radiation and other mutational effects of the Wasteland.

The debuff effect changes the more water that is consumed. The following shows the effects based on the amount of bottles ingested:

  1. -1 Strength for 12 minutes
  2. -2 Strength for 18 minutes
  3. -2 Strength and -1 Intelligence for 24 minutes
  4. Death
Note: the bottle count stacks with holy water, resulting in death if 4 bottles of any mix of the two items are consumed (i.e. 2 holy water and 2 Aqua Pura).
Note: even if the effects of the debuff have worn off, the bottle count does not reset back to zero; resulting in death on the 4th bottle regardless of how much time has passed between each consumption.




  • Despite being identical to purified water, the value of Aqua Pura is 14 caps less than purified water.
  • Aqua Pura infected with Modified FEV can be given to water beggars in exchange for negative Karma.


  • PCIcon pc.png PlayStation 3Icon ps3.png Xbox 360Icon xbox360.png Giving any amount of Aqua Pura to Water Beggars will result in their death at the next map change, regardless of whether or not the Aqua Pura contains modified FEV.
  • PCIcon pc.png PlayStation 3Icon ps3.png Xbox 360Icon xbox360.png Sometimes after drinking Aqua Pura a message will appear saying that "aqua pura has worn off". This is like when a chem wears off but there were no effects to begin with. This message may appear at random times, days after drinking Aqua Pura. This is not really a bug but a scripting quirk. Because tainted Aqua Pura has a debuff effect it's treated like a chem. The taint effect is still applied to the player, but since the effect fails a condition check, the actual debuff and player death chance aren't applied. The pure Aqua Pura is thus also treated as a chem though it has no ill effects; the end result being the "worn off" messages.
  • Xbox 360Icon xbox360.png Non-player characters use this as an aid item during firefights. It has the same effects on them if there is modified FEV added to the water. However, non-player characters drinking it will trigger the script that attributes the negative effect to you. In essence, if non-player characters drink many infected Aqua Puras, the script will kill you instead of them.
  • PCIcon pc.png PlayStation 3Icon ps3.png Xbox 360Icon xbox360.png Aqua Pura crates can appear before Take It Back! has been completed if Broken Steel is installed.