As you continue forward, you will eventually encounter a small pool of dirty sewage water with several large pipes feeding into it. The water sample you need is connected to ARC Raiders Coins one of these pipes.

Look toward the left-hand side of the room and approach the pipe there. Once close enough, you will receive an interaction prompt allowing you to collect the water sample for Celeste.

After interacting with the pipe, the objective updates immediately, confirming that the sample has been secured.

Safely Extracting With the Sample

Collecting the water sample is only half the mission. Like most extraction shooter objectives, you still need to survive and successfully leave the raid.

This is where many players fail the quest.

Because the Flood Access Tunnel is located in a somewhat isolated section of the map, it can be tempting to sprint directly toward extraction without checking your surroundings. However, enemy players often patrol nearby high-traffic routes leading away from the Red Lakes region.

A few important survival tips include:
Avoid unnecessary fights after securing the sample
Stick to the cover while crossing open areas
Listen carefully for footsteps and gunfire
Save healing items for emergency situations
Use elevation and terrain to avoid detection

If you are carrying valuable loot in addition to the water sample, extracting safely becomes even more important.

Once you successfully leave the raid, return to Speranza and speak with Celeste again. Handing over the sample will complete the Water Troubles quest.

Water Troubles Quest Rewards

Completing Water Troubles rewards players with several valuable crafting materials that can help improve gear progression early in the game.
The rewards include:
3x Simple Gun Parts
3x Steel Springs
3x Mechanical Components

These resources are used at the workbench to cheap ARC Raiders Coins craft and upgrade important equipment. While the rewards may not seem flashy, they are extremely useful for maintaining steady progression during the early and mid-game stages of ARC Raiders.