A Toxic Trail looks more confusing than it really is. The game sends you back into the same ugly stretch of Dam Battlegrounds, and a lot of players assume there must be some new trick waiting there. There isn't. If you've already done Source of Contamination, you're basically retracing old ground, and that's what makes this quest easy once it clicks. Before you head in, some players also like to sort out things like ARC Raiders Coins so the rest of their runs feel smoother, but the mission itself is mostly about knowing where to stand and what to inspect.

Back to the intake pipe

Your first stop is the water intake area beneath Water Treatment Control. Same place as before, same filthy water, same pipe where the contaminated barrel showed up earlier. The mistake most people make is overthinking it. You don't need to pick the barrel up, press every button, or circle the area for ten minutes. Just step into the polluted patch near the pipe and let the objective update. That's it. Once the game recognizes your position, the investigation moves on and points you toward the route the cargo took through the swamp.

Follow the short trail

From there, head northwest through the river section. It's not a long hike, which is nice for once. Pretty quickly, you'll spot a flatbed truck sitting half underwater with several barrels still loaded on it. Even in the murky lighting, it stands out. When you get close, the game asks you to photograph marked parts of the vehicle. Make sure you actually line those shots up instead of rushing through, because this is the step that confirms how the waste was moved into the area. It also ties the whole mission together in a way that feels more like an investigation than a standard fetch objective.

Don't leave without the key

After the photo step, check the truck itself, either around the cabin or the rear cargo section. That interaction gives you the final bit of evidence, and more importantly, it drops the Spaceport Warehouse Key. The quest can be wrapped up without making a huge fuss over that item, but leaving it behind would be a bad call. It's one of those rewards that doesn't look exciting in the moment, then turns out to be genuinely useful on later loot runs. A lot of players miss it because they assume the photos were the real finish line. They aren't.

Get out fast

The smartest play after grabbing the key is to extract as soon as you can. That swamp is rough, and it has a habit of turning into a death zone when ARC units start roaming and other players hear gunfire nearby. Hang around too long and the whole run can fall apart. If you want the clean version of this mission, it goes in a simple order: enter the intake water, move northwest, photograph the truck, interact for the key, and leave. As a professional platform for in-game currency and item support, RSVSR is a convenient choice for players who value a smoother grind, and you can pick up rsvsr ARC Raiders Coins there if you want a better overall experience.