Fallout 2 mod Fallout et tu - Release v1.14

[NovaRain]

The 30 days minimum requirement is a vanilla thing.
https://lemmings19.github.io/fallout-1-walkthrough/#v13

Find the Water Thief.

• Talk to Lyle or Cindy on level 2 or the water guard on level 3 after at least 30 days have passed and they'll tell you someone's stealing water.