
In the video game Once Human, players who want to establish a passive Acid farm must place their territories next to polluted water. To find polluted water, players can use their backpacks to confirm the presence of pollution. There are four areas that players who are looking for polluted water should target. Three of those areas are within Red Sands, and they are very close to Blackfell, Evergreen, and the Alternate Reality Research Institute. The fourth area is on the west side of Chalk Peak.
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What You'll Learn
- Polluted water is found in Chalk Peak and Red Sands
- Players should place their territory close to a body of water
- Use a Tier 3 Logistics Memetic to unlock a Water Pump
- Place the Water Pump in the water and wait for it to extract polluted liquid
- Use an Osmosis Water Purifier to cleanse the polluted water

Polluted water is found in Chalk Peak and Red Sands
In the post-apocalyptic world of Once Human, polluted water can be found in Chalk Peak and Red Sands. Once Human is a multiplayer, open-world survival game where players must fight enemies, uncover plots, compete for resources, and build their own territories.
There are four areas with polluted water in the game, and players can refer to a map to locate these contaminated locations. Three of these areas are within Red Sands, close to Blackfell, Evergreen, and the Alternate Reality Research Institute. The fourth area is on the west side of Chalk Peak, a more remote location.
Players can place their territory near a body of water and use a Water Pump, unlocked at Tier 3 Logistics Memetic, to extract the polluted liquid. Once the polluted water has been collected, players can use an Osmosis Water Purifier (Tier 5 Logistics Memetic) to cleanse it. This purification process yields a byproduct called Impure Acid, which can be transformed into standard Acid using a Brewing Barrel.
Players seeking to quickly amass Acid may want to explore alternative methods of farming, as the conversion process from polluted water takes a significant amount of time. However, establishing a passive Acid farm is recommended, as Acid is a valuable resource in the game.
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Players should place their territory close to a body of water
In the game Once Human, players need to find Polluted Water to farm and produce Acid, which is then used to craft other items such as Gunpowder, Batteries, Ingots, and crafting materials like Tungsten. As it is a key resource, players should place their territory close to a body of water to easily collect polluted water.
There are several locations in the game where players can find polluted water, such as the lake next to the Gaia Research Center Ruins in the Broken Delta region, and the Ricci Securement Tower in Iron River. There are also four places in Red Sands, which are very close to Blackfell, Evergreen, and the Alternate Reality Research Institute. The fourth area is on the west side of Chalk Peak, which is more remote.
To collect polluted water, players need to unlock Water Pumps from the Memetics tree. They can do this by going to the Logistics section of their Memetics menu and getting the blueprints for the pump. Once they have the pump, they need to submerge it fully in the water source and connect it to the tanks on their territory. The water pumps will then automatically start collecting the polluted water.
It is important to note that players will need at least three or four water tanks to store the polluted water. This way, they can continue with other tasks while the water pump works passively.
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Use a Tier 3 Logistics Memetic to unlock a Water Pump
Once Human is a multiplayer, open-world survival game set in a post-apocalyptic future. In the game, players must compete for resources and build their own territories. One such resource is water, which can be found in polluted form in specific areas.
To access polluted water, players must first unlock a Tier 3 Logistics Memetic, which will allow them to obtain a Water Pump. This pump is used to extract polluted water and move water from a low point to a higher point. The process of unlocking the Tier 3 Logistics Memetic and obtaining the Water Pump is as follows:
- Players must place their territory close to a body of water, with polluted water being found in specific locations, such as Red Sands and Chalk Peak.
- Once the territory is established, players can unlock the Tier 3 Logistics Memetic, which will grant them access to the Water Pump in the Logistics section of their Memetics menu.
- After obtaining the blueprints for the Water Pump, players must construct it via Build Mode, positioning it in the water and ensuring it is fully submerged.
- To power the Water Pump, players can deploy Electric Eels, which will begin the process of extracting polluted water.
- It is important to note that additional Water Tanks are required to store the polluted water, as the extraction process is passive and can be left to continue while players attend to other tasks.
By following these steps, players can effectively unlock the Tier 3 Logistics Memetic and utilise the Water Pump to access and extract polluted water, which can then be used for various purposes within the game.
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Place the Water Pump in the water and wait for it to extract polluted liquid
Once you've found a polluted water source in Once Human, a multiplayer open-world survival game, you'll need to harvest it using a Water Pump. To do this, you must first unlock a Tier 3 Logistics Memetic to access the pump.
Next, place the Water Pump in the water and wait for it to extract the polluted liquid. Make sure the pump is fully submerged in the water, or it won't work. You can power the pump by deploying Electric Eels, or by connecting it to a power source such as Hydraulic Generators.
It's important to note that you'll need at least three or four Water Tanks to store the polluted water. This way, you can continue with other tasks while the Water Pump works passively.
The kind of liquid you get from a Water Pump depends on where you place it. If you build it over a patch of black ground in the Blackheart or Red Sands regions, you'll get Crude Oil. If you place it over dirt or sand in a Stardust-polluted area, it will extract Polluted Water.
To avoid blockages when pumping dirty or contaminated water, you can use a self-cleaning filter. This will continuously clean the filter mesh, preventing debris from blocking the pump.
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Use an Osmosis Water Purifier to cleanse the polluted water
In Once Human, a multiplayer open-world survival game, players can use an Osmosis Water Purifier to cleanse polluted water. This is a Tier 5 Logistics Memetic that can be used after pumping polluted water from one of the four polluted water areas in the game.
To purify polluted water, players can use a water pump to extract the water and then use an Osmosis Water Purifier to cleanse it. This process is necessary to obtain clean water, which is essential for survival in the game.
Osmosis water purifiers work by forcing water through a series of fine membranes. The water's composition allows it to pass through these membranes, leaving larger particles and contaminants behind. This process is known as reverse osmosis, and it is highly effective at removing impurities from water, including heavy metals, chemicals, microplastics, and PFAS.
The Sans Water Purifier, for example, uses a three-filter system to target specific contaminants. The first filter, the Pre + Carbon filter, traps larger particles and sediments and is replaced annually. The second filter, the VOC Carbon filter, eliminates unpleasant odors and tastes and is also replaced every 12 months. The third filter, the Reverse Osmosis filter, removes heavy metals, chemicals, and microplastics and is replaced every 24 months.
By using an Osmosis Water Purifier, players in Once Human can ensure they have access to clean and safe water, which is crucial for their in-game survival and well-being.
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Frequently asked questions
There are four areas that players can target: three within Red Sands, close to Blackfell, Evergreen, and the Alternate Reality Research Institute, and one on the west side of Chalk Peak.
Players should place their territory close to the body of water and then use a Water Pump, accessible after unlocking a Tier 3 Logistics Memetic, to extract the polluted liquid.
Once players have started pumping polluted water, they can use an Osmosis Water Purifier, a Tier 5 Logistics Memetic, to cleanse it.











































