ARC Spawns

Source of the Contamination: ARC Raiders quest guide

Source of the Contamination is a quest from Celeste with 3 objectives that rewards 5 Steel Spring, 5 Duct Tape and 1 Mod Components.

I’m not saying our water’s been tampered with, but based on your samples, I can’t rule out the possibility either. Would you return to the Dam and see what’s wrong?

Objectives

  1. Reach the Water Treatment Building in The Dam
  2. Search for the Flood Spill Intake near the Swamp
  3. Investigate any suspicious objects

Objectives update the moment you complete them in raid, so you can stack this quest with others from Celeste that send you to the same map. Extract alive to keep any items you picked up for it.

Rewards

RewardWhat it isOur call
5 × Steel SpringUncommon Topside Material. Used to craft a wide range of items. Can be recycled into crafting materials. Used to craft: Extended Shotgun Mag I, Extended Medium Mag I, Extended Light Mag I, Torrente, Extended Medium Mag IIKeep
5 × Duct TapeUncommon Topside Material. Used to craft a wide range of items. Can be recycled into crafting materials. Used to craft: Stable Stock I, Vertical Grip I, Angled Grip I, Vertical Grip II, Angled Grip IIKeep
1 × Mod ComponentsRare Refined Material. Used to craft weapon mods. Can be recycled into crafting materials. Used to craft: Lightweight Stock, Shotgun Choke III, Extended Shotgun Mag III, Padded Stock, Compensator IIIRecycle

Together the item rewards are worth about 4,750 coins at sell value.

Quest chain

Unlocked after Water Troubles. Completing it unlocks Switching the Supply.

Tips for Source of the Contamination

Source of the Contamination is one of 25 quests Celeste gives. Read every objective before you load in so you bring the right tools, and carry a spare slot for anything you need to pick up. If an objective asks you to search or reach a place, go there early in the raid before other Raiders and ARC converge on the area.

More Celeste quests