Holy Water (quest)

 is a Fallout 3 quest that is added to the game in the Broken Steel downloadable content pack.

Walkthrough

 * You pick up this quest from Scribe Bigsley, after asking him about what you can do to help. He asks you to investigate the area around Megaton to see why they need more water, after just being sent a weeks shipment of Aqua Pura.
 * After arriving at Megaton, you will witness a 'cutscene' of sorts. An NPC named Rosa will give a water beggar a bottle of seemingly pure water. He drinks the water, and dies.
 * Rosa then approaches you, and after a short conversation she reveals that she recieved the water from a church in Springvale. The Church is marked on your map.
 * After finding the Church, you will find Brother Gerard. He will reveal that the leader of the church, Mother Curie III has been blessing water so that wastelanders may 'bask in Atom's Glow'. You may ask Gerard if you can meet Mother Curie III but you must either be irradiated or you must pass a speech challenge.
 * After either becoming irradiated or passing the speech challenge, you enter the basement of the church by means of a trap door. Mother Curie is giving a sermon to two ghoul's as you enter. Once she finishes the sermon she engages you in conversation. She tells you that she has been 'stealing' the Aqua Pura from the Brotherhood caravans, and turning it into holy water. She does this because she wants to share Atom's gift with the people of the Capital wasteland. This gift, is ghoulification.
 * From here on out, you have three options. You can talk her out of stealing water with a speech challenge or Charisma check, you can murder them all or you can irradiate yourself to an extremely critical level. If you do, Curie will think you're the Prophet of Atom and will willing give up irradiating the water as if you passed a speech or charisma check. You can irradiate yourself in the basement using a radiation trap thats turned on with a switch. Be wary if you decide to kill them, there are a Feral Ghoul Roamer and a Glowing One in the next room which will turn hostile.