In a series of ARC Raiders quests, Celeste sends Raiders to the Dam Battlegrounds to test its water. She's trying to find out if Speranza's water has been tampered with. This guide will focus on completing the Source of the Contamination quest in ARC Raiders, including helping players reach the Water Treatment building in the Dam and searching for the Flood Spill Intake near the swamp.

Best Weapons In ARC Raiders
Weapon Tier List in ARC Raiders

Here are the guns available in ARC Raiders, sorted in a tier list.

Where To Find The Flood Spill Near The Swamp In ARC Raiders

The Flood Spill Intake near the Swamp location in ARC Raiders

The Source of the Contamination quest starts by leading players to reach the Water Treatment building in the Dam.

It's a simple quest in the Dam Battlegrounds map, which is the easiest map in ARC Raiders. The good part of Dam Battlegrounds is that most hostile players will automatically go to the Research and Administration high-value area to fight other hostile players. So, completing the Source of the Contamination quest in ARC Raiders can be a smooth journey.

The Flood Spill Intake close up location on the map in ARC Raiders

You can find the first task's objective area north of the Water Treatment building, in the forest above it.

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Looking for more in the Dam Battlegrounds region? Check out our ARC Raiders Dam Battlegrounds interactive map!

Reach the Water Treatment Building in The Dam in ARC Raiders

After you reach north of the Water Treatment Control area, you'll complete the first task to reach the Water Treatment building in the Dam, and a new task will appear, stating to search for the Flood Spill Intake near the swamp.

Search for the Flood Spill Intake near the Swamp in ARC Raiders

You can find the objective at the end of the swamp. It's a broken barrel spilling toxic liquid all over the surrounding area. Approach the barrel and interact with it to finish two objectives in the Source of the Contamination quest:

  • Search for the Flood Spill Intake near the Swamp.
  • Investigate any suspicious objects.

Luckily, there are no items to take back to Speranza, so you can start the raid with a free loadout. It's more of a quick in and out mission, where you'll just load the Dam Battlegrounds map, get north of the Water Treatment Control area, and complete the Source of the Contamination quest in ARC Raiders.

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Extraction
Shooter
Third-Person Shooter
Survival
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Systems
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Top Critic Avg: 87 /100 Critics Rec: 92%
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Released
October 30, 2025
ESRB
Teen / Violence, Blood
Developer(s)
Embark Studios
Publisher(s)
Embark Studios
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ARC Raiders release window announced with launch plans
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WHERE TO PLAY

DIGITAL
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Genre(s)
Extraction, Shooter, Third-Person Shooter, Survival