Badwater and Contamination: Complete Defense Guide

Badwater is one of Timberborn's most dangerous environmental hazards and one of its most valuable mid-game resources. During badtide events, contaminated water floods your map, poisoning crops, contaminating terrain, and sickening beavers who drink it. Yet with the right infrastructure, you can not only defend against badwater but harness it to produce Extract, a critical late-game material used for advanced explosives, bot production, and terraforming. This guide covers every aspect of the badwater system, from the mechanics of contamination to building an automated defense and processing network.

Badtide Mechanics: How Contamination Events Work

Badtides are one of two hazardous weather events in Timberborn, alternating with droughts during the hazardous weather cycle. During a badtide, water sources on the map emit contaminated water instead of clean water. This contaminated fluid looks visually distinct (a sickly green-brown color) and carries devastating effects.

Contamination during a badtide ramps up gradually. When a badtide begins, water source contamination starts at 50% and increases to 100% over the first 12 in-game hours. This means you have a brief window at the start where contamination is not at full strength. Similarly, contamination begins decreasing 12 hours before the badtide ends, reversing down from 100% to 50% before clean water returns. This ramping behavior is important for timing your Floodgate management.

Badtide duration scales with difficulty, similar to droughts. On easy difficulty, the first badtide lasts only 1 day. On normal, it also starts at 1 day but escalates faster. On hard difficulty, the first badtide can last 6 to 12 days, presenting an immediate and severe threat. Like droughts, badtide duration increases with each subsequent event.

The probability of a badtide occurring follows a streak system. By default, there is a 40% chance that any hazardous event is a badtide (60% chance of drought). However, consecutive droughts increase the badtide probability: after 5 droughts in a row, the chance rises to 70%, and after 7 consecutive droughts, a badtide is guaranteed. This streak mechanic resets when a badtide occurs.

How Contamination Spreads

Contaminated water behaves like regular water in terms of flow physics but carries an additional contamination property. When contaminated water touches clean water, the contamination spreads. When contaminated water sits on terrain, it contaminates the soil beneath it.

Contaminated terrain is one of the most persistent effects of badtides. Once soil becomes contaminated, it stays contaminated even after the badwater recedes. Contaminated terrain cannot support crops, and trees growing on contaminated land will die. The contamination spreads horizontally through connected soil blocks, meaning a single patch of contaminated ground can slowly expand to affect a wider area over time.

Water with contamination above 50% actively kills plants and damages terrain. Below 50%, the effects are less severe but still harmful to beavers who drink it. Beavers who consume contaminated water become sick, suffering wellbeing penalties and reduced productivity. Severe contamination exposure can lead to beaver death.

Contamination can reach your colony through multiple paths: direct flow from the river source, overflow from contaminated reservoirs, seepage through terrain, and even through gaps in your defenses that are too small to notice. Comprehensive defense requires addressing all of these vectors.

Contamination Barrier (Folktails)

The Contamination Barrier is a Folktails-exclusive landscaping structure that prevents contaminated terrain from spreading beneath it. It is one of the most important defensive buildings against badtide damage.

Each Contamination Barrier is a 1x1 flat structure placed on the ground. It blocks contamination from spreading through all dirt blocks directly below it, creating an underground wall that stops soil contamination from reaching your farmland and tree plantations. The barrier costs 5 Planks and 1 Metal Block to build and requires 400 Science to unlock.

Placement is critical: Contamination Barriers must form a continuous line with no gaps. If there is any gap in the barrier line, contamination can seep through and continue spreading on the other side. Barriers only work on ground level and cannot be placed on elevated terrain. They also do not affect irrigation in any direction, so placing them near your farms will not reduce water access to your crops.

A common defense strategy is to place a ring of Contamination Barriers around your main farming district. This creates a protected zone where crops are safe from soil contamination regardless of what happens outside. Extend the barrier line to cover your tree farms and any other vegetation-dependent areas. Remember that barriers stop soil contamination spread, not badwater flow itself. You still need Dams and Levees to block contaminated water from physically flowing into your protected areas.

Irrigation Barrier (Iron Teeth)

The Irrigation Barrier is the Iron Teeth equivalent of the Contamination Barrier, but with an important distinction: it blocks both contamination spread and irrigation. This dual functionality makes it more powerful for contamination defense but requires careful placement to avoid cutting off water access to your crops.

Like the Contamination Barrier, Irrigation Barriers are 1x1 ground-level structures that prevent contaminated terrain from spreading through the soil blocks below them. The key difference is that they also block the irrigation mechanic, which means crops on the far side of an Irrigation Barrier from your water source will not receive irrigation water.

This trade-off means Iron Teeth players must plan their defense lines carefully. Place Irrigation Barriers between your water source and any areas you want to protect from contamination, but ensure your farmland has an alternative irrigation source on its side of the barrier. This often means building a secondary water supply (a dedicated reservoir or Water Tank feeding a Fluid Dump) within the protected zone.

Iron Teeth have a natural advantage in dealing with this limitation because their Hydroponic Garden does not require irrigation at all. Mushrooms and Algae grow using stored water from tanks, completely bypassing the irrigation system. A colony that relies heavily on Hydroponic Gardens for food can use Irrigation Barriers aggressively without worrying about crop irrigation.

Badwater Pump and Badwater Collection

Rather than simply defending against badwater, advanced colonies harvest it as a resource. The Badwater Pump (Folktails) and Deep Badwater Pump (Iron Teeth) extract contaminated water and store it for processing.

The Badwater Pump is placed adjacent to a contaminated water source and extracts badwater into storage. This serves two purposes: it removes contaminated water from your environment (reducing the contamination threat) and it collects raw material for the Centrifuge. Place Badwater Pumps at the upstream edge of your colony where contaminated water first arrives during badtides, creating a collection point that intercepts contamination before it reaches your farms.

The Deep Badwater Pump (Iron Teeth exclusive) can access contaminated water at greater depths, similar to how the Deep Water Pump accesses deeper clean water. This is valuable on maps where badwater pools in deep depressions or behind dams. Iron Teeth players can build dedicated badwater collection reservoirs: areas where contaminated water is deliberately channeled and stored for later pumping and processing.

Badwater storage requires large tanks, and badwater weighs 2 kg per unit. Store badwater separately from clean water to avoid contamination of your drinking supply. Plan your badwater storage and processing area downstream or in a separate district from your main colony to minimize the risk of accidental contamination.

Centrifuge and Extract Production

The Centrifuge is the primary building for converting raw badwater into useful Extract. It is available to both factions and represents the transition from badwater defense to badwater exploitation.

Each Centrifuge is a 3x3 building that requires 200 horsepower and 2 workers to operate. It converts 4 units of Badwater plus 0.1 Logs into 1 unit of Extract, with a processing time of 0.75 hours per cycle. The building can store 80 units of Badwater input, 5 Logs, and 20 units of Extract output. Construction requires 60 Planks, 40 Gears, and 30 Metal Blocks, and you need 600 Science to unlock it. The bot workplace upgrade costs an additional 1,500 Science.

Extract is an incredibly versatile resource used in several advanced recipes. It fuels the Explosives Factory for producing advanced Dynamite used in terraforming. It powers certain bot production and maintenance processes. It can also be used in the production of additional beavers via advanced breeding mechanics.

A well-designed badwater processing chain flows as follows: Badwater Pumps extract contaminated water during badtides and store it in dedicated tanks. The Centrifuge draws from these tanks to produce Extract continuously, even during temperate weather when no new badwater is available. Excess badwater can be disposed of through the Fluid Dump if storage becomes full. This chain transforms a deadly threat into a steady resource income.

Decontamination Buildings and Terrain Recovery

After a badtide, contaminated terrain persists and continues spreading slowly. Decontamination buildings reverse this damage, restoring contaminated soil to usable land.

Decontamination structures work by gradually cleaning contaminated terrain within their radius. Place them at the edges of contaminated zones to push the contamination boundary back over time. Multiple decontamination buildings working on the same area speed up the process. The key is starting decontamination immediately after the badtide ends, while the contaminated area is still relatively contained.

Each faction has different tools for terrain recovery. Folktails rely on their natural affinity with the land, using buildings that slowly heal terrain through organic processes. Iron Teeth take a more industrial approach, using powered machinery to strip contamination from the soil. Both methods achieve the same result but at different speeds and resource costs.

Prevention is always more efficient than cure. A well-placed line of Contamination Barriers or Irrigation Barriers that prevents contamination from reaching your farmland eliminates the need for decontamination in those areas entirely. Focus decontamination efforts on strategically important terrain that was not protected, such as newly acquired land for district expansion or areas you plan to develop for farming.

Building an Automated Badwater Defense

The ultimate goal for badwater management is a fully automated system that defends your colony and processes badwater with minimal player intervention.

Start with a layered defense perimeter. Your first layer is a Dam or Levee wall across the river upstream of your colony, equipped with Floodgates for controlled water release during temperate weather. Close these Floodgates during badtides to prevent contaminated water from flowing into your colony area. Your second layer is a continuous line of Contamination Barriers (Folktails) or Irrigation Barriers (Iron Teeth) around your farmland and living areas, preventing soil contamination from spreading through the ground.

Next, build a dedicated badwater collection zone on the contaminated side of your defenses. Channel badwater into a containment reservoir using terrain shaping and Levee walls. Place Badwater Pumps along this containment area to extract the contaminated water. Route the collected badwater through storage tanks to your Centrifuge processing facility.

The processing facility should include multiple Centrifuges with dedicated power supply (200 horsepower each) and a steady supply of Logs. A single Centrifuge processes roughly 5.3 units of Badwater per hour (4 units per 0.75-hour cycle). For a large colony collecting substantial badwater during badtides, plan for 2 to 3 Centrifuges running continuously.

Iron Teeth have a unique advantage in automated defense: the Badwater Discharge combined with a Large Water Wheel generates power from the contaminated water flow during badtides. This means your processing facility can be partially powered by the very hazard it is defending against. Channel badwater through a Badwater Discharge, use the flow to drive Water Wheels for power, then collect the used badwater for Centrifuge processing downstream.

Sluice and Flow Control for Contaminated Water

Managing the flow of contaminated water requires careful infrastructure design. While the Sluice building has been made obsolete in recent updates, its role in controlling one-way fluid flow has been replaced by more modern building options and Floodgate configurations.

Floodgates remain your primary tool for controlling badwater flow. During badtides, keep Floodgates on your main Dam closed to prevent contaminated water from entering your clean water reservoirs. If you have a separate badwater collection channel, open the Floodgates on that channel to direct contaminated flow into your containment reservoir.

Levee-walled channels can direct badwater around your colony to a processing area downstream. Build a bypass channel with Levee walls high enough to contain the expected badtide water levels. This channel routes contaminated water away from your farmland and living areas while delivering it to your Badwater Pumps and Centrifuges.

An advanced design uses a three-reservoir system: one clean water reservoir upstream (sealed during badtides), one badwater collection reservoir in the middle (open during badtides to receive contaminated flow), and one clean water supply reservoir downstream (fed from the upstream reservoir through Floodgates during temperate weather only). This three-stage system completely separates your clean water supply from badwater while maximizing collection for Extract production.

Faction-Specific Strategies for Badwater

Each faction has distinct advantages and challenges when dealing with badwater contamination.

Folktails excel at prevention. Their Contamination Barrier blocks soil contamination without affecting irrigation, making it simple to protect farmland. The Beehive accelerates crop regrowth after badtide damage, helping farms recover quickly. Folktails should prioritize a strong barrier perimeter and focus on recovering contaminated terrain through decontamination buildings. Their crop variety (especially aquatic crops from the Aquatic Farmhouse like Cattail and Spadderdock) gives them flexibility in relocating food production away from contaminated areas.

Iron Teeth excel at exploitation. Their Deep Badwater Pump accesses contaminated water at greater depths, enabling more efficient collection. The Engine provides drought-proof power for Centrifuge operation, and the Badwater Discharge generates bonus power from contaminated flow during badtides. Iron Teeth should lean into badwater processing as a core part of their economy, building larger Centrifuge arrays and using Extract for advanced manufacturing. Their Hydroponic Garden provides contamination-immune food production, and the Irrigation Barrier gives them a powerful (if irrigation-blocking) defense option.

Regardless of faction, the transition from treating badwater as a pure threat to treating it as a resource is the mark of a mature colony. Early game, focus on defense and prevention. Mid game, build your first Centrifuge and start collecting. Late game, design your entire water infrastructure to maximize badwater collection during badtides while keeping your colony safe and productive.