← Back to quest guides
Quest Guide: Source of the Contamination
Quest guide 9 Mar 2026

Quest Guide: Source of the Contamination

Dam Battlegrounds walkthrough for Source of the Contamination with objectives, prep, route order, and extract notes.

Source of the Contamination is a quest run in ARC Raiders. This version is written as a practical raid plan: what to bring, the order to run the steps in, and what usually kills the run once the quest is technically done.

Quest#63
Map laneDam Battlegrounds
Objective count3
Same raid?Usually no

Objective list

  • Reach the Water Treatment Building in The Dam
  • Search for the Flood Spill Intake near the Swamp
  • Investigate any suspicious objects

What to bring

  • A reliable mid-range primary and a sidearm or close-range backup; most quest deaths happen while rotating, not while looting.
  • Stamina-friendly utility like smoke or a distraction item, because recon steps usually force you into exposed rooftops, offices, or dead-end rooms.

How to run it

Plan the raid around the first named objective and your nearest safe extract, not around the fattest loot route. If the quest item drops into your inventory, the raid is now an escort mission and everything else is optional.

  1. Step 1: Reach the Water Treatment Building in The Dam

    Make this your opening waypoint. Move quickly, clear only what blocks the path, and do not burn utility before you reach the named area.

  2. Step 2: Search for the Flood Spill Intake near the Swamp

    Once you are at the point of interest, clear the nearest angle first, then interact. Most misses on this step happen because players sprint past the actual prompt or loot through the room too early.

  3. Step 3: Investigate any suspicious objects

    Treat this as a hard objective, not a side stop. Finish the interaction, confirm the quest tracker updates, then rotate before the next squad arrives.

Where players usually throw this quest

  • Running past the actual interaction prompt. Slow down for five seconds, clear the room, and let the tracker update before leaving.
  • Taking a fight on the way out just because you hear it. Quest raids are won by discipline, not by K/D.

Miswired note

Use the named area as your anchor, then plan your extract before you touch the objective. That matters more than another backpack worth of salvage on Dam Battlegrounds.