
Polluted Dirt is an unprocessed biological waste product in the space-colony simulation game Oxygen Not Included. It is an organic resource that emits polluted oxygen over time, even when stored in containers. This emission can be prevented by submerging the dirt in liquid or storing it under gas pressure. Polluted Dirt can be converted into regular dirt using a compost or a sublimation station, which can then be used to create oxygen. Additionally, it can be fed to Pokeshells to produce lime and sand, or to Sage Hatches for coal. Effective management of Polluted Dirt is crucial to maintaining a thriving colony in the game.
| Characteristics | Values |
|---|---|
| Polluted Dirt | Unprocessed biological waste |
| Emission of Polluted Oxygen | Prevented by submerging in a liquid or storing under gas pressure of 1.8kg/tile |
| Sublimation Station | Converts Polluted Dirt to Polluted Oxygen |
| Storage | Storage Bin under water |
| Conversion | Converted into Dirt inside a Compost |
| Geotuners | Require Polluted Dirt when geotuning a Carbon Dioxide Geyser or Vent |
| Outhouses | Convert 13kg Dirt into 19.7kg Polluted Dirt each use |
| Ethanol Distiller | Produces Ethanol and Polluted Dirt from Lumber |
| Water Sieve | Produces Polluted Dirt as a by-product |
| Pacus | Consume Algae and excrete Polluted Dirt |
| Sludge Press | Produces 60kg Polluted Dirt and 90kg Polluted Water from 150kg Polluted Mud |
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What You'll Learn
- Store polluted dirt in a storage bin under water to prevent it from producing polluted oxygen
- Use a sublimation station to convert polluted dirt to polluted oxygen
- Feed polluted dirt to pokeshells to get lime and sand
- Use a compost to convert polluted dirt into dirt
- Use polluted dirt to feed sage hatches for coal

Store polluted dirt in a storage bin under water to prevent it from producing polluted oxygen
Polluted Dirt is an organic resource in Oxygen Not Included. It emits polluted oxygen over time, even when stored inside a storage bin. This is because, when stored at a pressure below 1800g, polluted dirt releases polluted oxygen, losing mass in the process.
However, there is a way to prevent this emission of polluted oxygen. One effective method is to submerge polluted dirt in a liquid. By storing polluted dirt in a storage bin under water, you can stop it from producing polluted oxygen. The water prevents the release of polluted oxygen from the polluted dirt, even if it is just a few kilograms of water in a tile. This technique is especially useful for storing off-gassing solids.
Additionally, you can also prevent the emission of polluted oxygen by storing the polluted dirt under a gas pressure of at least 1.8kg/tile. This can be achieved by ensuring that the surrounding atmospheric pressure is above this threshold.
In the Spaced Out (DLC), the emission rate is reduced by a factor of 10, balancing against the occurrence of asteroids with a high amount of polluted dirt.
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Use a sublimation station to convert polluted dirt to polluted oxygen
Polluted Dirt is an unprocessed biological waste and an organic resource in Oxygen Not Included. It emits Polluted Oxygen over time, especially when stored at a pressure below 1800g. This emission of Polluted Oxygen can be prevented by submerging Polluted Dirt in a liquid or storing it under a Gas pressure of at least 1.8kg/tile.
A Sublimation Station is a building in the game that can be used to convert Polluted Dirt into Polluted Oxygen. This process is known as sublimination, where solid Polluted Dirt is converted into a breathable gas. The Sublimation Station becomes idle when the area reaches its maximum pressure capacity.
Using a Sublimation Station to convert Polluted Dirt into Polluted Oxygen has its advantages and disadvantages. On the one hand, allowing Duplicants to breathe the Polluted Oxygen removes the cost of Deodorizers. However, this also results in the Yucky Lungs debuff, increasing air consumption by 30%. This option should be considered carefully, as a Polluted Oxygen atmosphere can lead to the rapid spread of Slimelung.
On the other hand, converting Polluted Oxygen into clean Oxygen requires the use of Deodorizers, which come at an additional power cost of 33 W and require 880 g/s of Filtration Medium. The deodorized output of one Sublimation Station can support 6 Duplicants.
To optimize the use of a Sublimation Station, consider the following tips:
- Use a second pump and a line of gas element sensors to eliminate the need for filters.
- Place deodorizers on a layer of mesh tiles above airflow tiles, with a layer of water in between, to pull in PO2 from below and convert it into pure O2.
- Automate the deodorizers to turn them off when the oxygen level reaches a certain threshold to prevent over-pressurization.
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Feed polluted dirt to pokeshells to get lime and sand
Polluted Dirt is an organic resource and unprocessed biological waste in the space-colony simulation game Oxygen Not Included. It emits Polluted Oxygen over time when stored at a pressure below 1800g. This emission of Polluted Oxygen can be prevented by submerging Polluted Dirt in a liquid or storing it under a Gas pressure of at least 1.8kg/tile. Polluted Dirt can be converted into Dirt inside a Compost.
One way to get rid of Polluted Dirt in Oxygen Not Included is to feed it to Pokeshells. Pokeshells consume Polluted Dirt or Rot Pile and excrete Sand, and shed shells that can be processed into Lime. Pokeshells can be used to eat up Polluted Dirt emptied from outhouses to supply Sand for deodorizers, serving as a medium for temporary clean oxygen solutions in remote regions or during the early game. Each cycle, all outhouses in a room need to be visited by Duplicants at least eight times and emptied timely to satiate a Pokeshell.
Pokeshells have three variants, determined by the liquid they live in. Each Pokeshell has a different drop upon growth and death, but all consume Polluted Dirt and produce Sand. For example, Sanishells, a variant of Pokeshells, consume Polluted Dirt, Slime, or Rot Pile and excrete Sand. Crushing Oakshell molts, another variant, yields Wood, which can be fed into an Ethanol Distiller. As the Dirt produced by an Ethanol Distiller offsets much of the cost for feeding Oakshells, Oakshells can be more resource-efficient for Sand production than other Pokeshell variants.
To feed Polluted Dirt to Pokeshells, players can use a critter feeder. However, it is mandatory to flood the critter feeder in liquid, or the Polluted Dirt inside will off-gas, and Duplicants will constantly run to the filled critter feeder to add a few grams. Another way to manage Polluted Dirt is to set up access rules on doors to limit how often Duplicants can get in to steal the food, so they only grab the Sand that has built up.
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Use a compost to convert polluted dirt into dirt
Polluted Dirt is an organic resource and unprocessed biological waste in the game Oxygen Not Included. It emits polluted oxygen over time when stored at a pressure below 1800g, losing mass in the process. This emission of polluted oxygen can be prevented by submerging polluted dirt in a liquid or storing it under a gas pressure of at least 1.8kg/tile.
One way to get rid of polluted dirt in Oxygen Not Included is to use a compost to convert it into dirt. This is a simple and low-tech method, but it is useful. With the resulting dirt and other elements, you can make everything else you need for your colonists, such as oxygen and food.
To make oxygen, you can use sand and deodorizers, and food can be generated from critters. Dupes will even produce water in the bathrooms. You can also feed polluted dirt to pokeshells for lime and sand, or to sage hatches for coal. Another option is to use a sublimation station to convert polluted dirt into polluted oxygen, which can then be cleaned with sand.
Polluted dirt can also be used in rockets instead of algae, and it has various other uses. For example, it can be fed to puffts through a sublimator or thrown into a hot geyser room to turn it into dirt. Storing polluted dirt in a storage bin under water will prevent it from producing polluted oxygen.
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Use polluted dirt to feed sage hatches for coal
Polluted Dirt is an organic resource and unprocessed biological waste in the game Oxygen Not Included. If stored at a pressure below 1800g, it emits Polluted Oxygen over time, even while in storage bins. This emission of Polluted Oxygen can be prevented by submerging Polluted Dirt in a liquid or storing it under a gas pressure of at least 1.8 kg/tile. It can also be converted into Dirt inside a Compost.
One way to utilise Polluted Dirt is to feed it to Sage Hatches, which will then excrete solid coal as waste. Sage Hatches are a variant of Hatch, a critter found in the starting Temperate Biome of the game. Hatches produce coal, eggs, meat, and refined metal. They can be domesticated and are useful for coal production.
Sage Hatches have a glossy green colour and consume organic compounds, including Polluted Dirt, slime, algae, and normal foodstuffs such as Meal Lice. They are particularly advantageous for the disposal of surplus Polluted Dirt. Sage Hatches are indifferent to bacteria or spoilage and can consume otherwise spoiled or inedible organics. They have the highest conversion rate among all four variants of Hatches.
To effectively use Polluted Dirt to feed Sage Hatches for coal production, players can ensure an adequate supply of Polluted Dirt by storing it properly to prevent the emission of Polluted Oxygen. This can be done by submerging it in water or storing it under sufficient gas pressure. Additionally, players can convert Polluted Dirt into Dirt using a Compost or generate it through various methods, such as using an Ethanol Distiller with Lumber or a Water Sieve with Polluted Water and Sand or Regolith.
By utilising these methods to manage and generate Polluted Dirt, players can ensure a consistent supply to feed Sage Hatches, resulting in a steady production of coal for their colony in Oxygen Not Included.
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Frequently asked questions
Polluted Dirt emits Polluted Oxygen over time and loses mass in the process. To prevent this emission, submerge polluted dirt in a liquid or store it under a Gas pressure of at least 1.8kg/tile. Alternatively, you can store polluted dirt in a Storage Bin under water to prevent the emission of polluted oxygen.
Polluted Dirt is unprocessed biological waste and is an organic resource in the game.
Polluted Oxygen is emitted by Polluted Dirt and Polluted Water. It can be filtered into pure oxygen.
Polluted Oxygen can be prevented by addressing its sources: Polluted Dirt and Polluted Water.
Polluted Water can be purified into clean water using a Water Sieve. It can also be converted into Fertilizer using a Fertilizer Synthesizer, or bottled and fed to Hatches to produce coal.











































