Breathe Easy: Stop Toxic Buildup Fast in RimWorld (1.6.4633) | Toxic Fix Tool

RimWorld Toxic Survival Desk
Local build 1.6.4633 rev1266 Toxic fallout 2.5 to 10.5 days Face mask +50% TER

Stop Toxic Buildup Fast

Breathe Easy: Stop Toxic Buildup Fast and Keep Colonists Fighting

Move the pawn under a roof or out of gas, kill outdoor work, get them off polluted tiles, and let the local ToxicBuildup hediff tick down at a baseline -0.08 severity per day while you lock a safe route. This page is built to answer what to do right now, why indoor buildup still happens, and which upgrades matter next.

Quick Fix Indoor Poison Gear Genes & Organs Combat Gas World Map Patch Watch Resources
1. Stop Toxic Buildup Now

Quick-Solution Playbook

Fastest safe moves for fallout, pollution, and tox gas fights.

Toxic Triage One-Pager
Trigger First Move Hold Until
Fallout sky Draft under roof, cancel outdoor work, zone SafeRoof. Below 30% before routine outdoor jobs.
Polluted route Stop pathing it, floor or reroute it, keep meals indoors. No polluted daily loop.
Dense tox gas Step out first, close doors, re-enter only with protection. Clear line of gas.
Serious 60%+ Bed rest 1, indoor food, indoor recreation, no hauling. Below 40%.
  1. Roof or gas exit comes before medicine.
  2. Zone the pawn, not just the room.
  3. Move food, meds, and fun under cover.
  4. At extreme buildup, treat the pawn like ICU.
Treatment Planner

This planner uses the local -0.08/day baseline decay from ToxicBuildup once exposure is truly zero.

Immediate plan

    Relevant statToxic environment resistance
    To 20% baseline4.0 days
    To 0% baseline6.5 days
    Light20%
    Moderate40%
    Serious60%
    Extreme80%
    Lethal100%

    Indoors But Still Getting Poisoned?

    The common failure points are route gaps, held-open doors, and polluted indoor floors.

    Work Restriction Snippet
    work_restrictions:
  haul_outdoors: false
  harvest: false
  hunt: false
  clean_pollution: runner_only
  area: SafeRoof
  bed_rest: priority_1
    Roof overlay first Food indoors Recreation indoors
    Fast Indoor Checklist
    • Toggle the roof overlay and patch tiny corner gaps.
    • Remove held-open doors from the safe lane.
    • Floor or avoid any polluted tile inside the route.
    • Move meals, medicine, and joy into the sealed room.
    • Keep one protected runner for emergency hauling only.

    Local rule: toxic fallout hurts living things not under a roof, but a roof does not make a polluted tile clean.

    Exposure Math You Can Trust

    What actually matters: Toxic environment resistance vs toxic resistance.

    Source Relevant Rule What Helps Do Not Assume
    Toxic fallout sky Roofed tiles block the sky exposure entirely. Roofed lanes, indoor stockpiles, TER gear. That one open doorway is harmless.
    Polluted terrain Polluted ground still matters even inside a roofed room. Reroute or floor the tile, plus TER. “Indoors” means safe by itself.
    Tox gas Break gas exposure first; toxic resistance matters most here. Gas mask, vacsuit helmet, tox-safe genes. Headgear cures buildup already taken.
    World travel Polluted travel stacks slowly but punishes already-sick pawns. Shorter route, shelter day, better headgear. A moderate pawn can brute-force a long detour.
    Recovery Local ToxicBuildup decays at -0.08/day away from exposure. Zero exposure, bed rest, indoor supplies. Bed rest itself is a cure.
    Animals, Guests, Prisoners
    • Penned animals will seek shelter during fallout, but only if the shelter exists.
    • Build a fast roofed barn for hay and bonded animals before the herd starves outside.
    • Stop prisoner labor and guest pathing that crosses outdoor tiles.
    When Serum Is Worth It
    • Use healer mech serum when buildup is extreme and exposure cannot be fully stopped.
    • The local serum description says it heals the single worst health condition.
    • Do not spend it just to skip a recoverable indoor wait.
    2. Advanced: Loadouts, Genes, Bionics, and Base Design

    Gear That Matters

    Pick protection that matches the source instead of wearing random helmets and hoping.

    Item Fallout / Pollution Tox Gas Best Use
    Face mask Yes. Local files give it +50% toxic environment resistance. Partial. Fast craft, cheap runner gear, safe short errands.
    Gas mask Limited. Strong. Waster fights, tox-shell cleanup, sealed killbox work.
    Vacsuit helmet Strong. Strong. Best general toxic head slot when you can field it.
    Marine / power helmet Armor first, toxic protection second. Do not rely on it alone. Good in gunfights, bad as a dedicated toxic answer.
    Healer mech serum Emergency only. Emergency only. Reset the worst condition when the pawn is spiraling.
    Face mask craft10 fabric ResearchComplex Clothing Work to make800

    Face mask is the cheap locally confirmed pick. The other toxic headgear lines shown here follow the current 1.6 toxic gear set.

    Bionics vs Genes

    Buy time with masks first; buy freedom with organs and genes later.

    Deaths now?         -> Yes -> 1 detoxifier lung first -> 2nd later -> kidney after
                   -> No
Outdoor-heavy base? -> Yes -> lungs + helmet -> tox-safe genes if you can lock them in
                   -> No
Fighting wasters?   -> Yes -> masks / gas kit first -> organs after loadout is stable
                   -> No  -> upgrade only the pawns who must go outside
    Which Stat Matters?
    • Toxic environment resistance protects against fallout, polluted routes, and rot-stink style exposure.
    • Toxic resistance is the key line against direct toxic gain and tox-gas style attacks.
    Upgrade Order
    • Cheap immediate: face masks and indoor zoning.
    • Mid-game steady fix: detox organs on outdoor workers.
    • Late-game comfort: tox-safe genes so the route matters less.

    Combat vs Wasters

    Fight in gas only when the room, doors, and fallback lane are already planned.

    • Double doors beat “open killbox” habits because gas punishes laziness harder than bullets do.
    • Build one clean-air bubble behind the firing line so downed pawns do not collapse inside gas.
    • Wasters and mechs ignore tox plans; always keep a non-gas win condition.
    Seal doors Fallback bubble Do not babysit gas

    Pre-Raid Gas Prep Checklist

    Short, practical, and easy to forget under pressure.

    1. Keep two toxic-safe helmets or masks per front-line shooter.
    2. Pre-place door blueprints where the fight tends to spread gas.
    3. Keep medicine and rescue lanes out of the gas room.
    4. If the density sticks after two door cycles, abandon the firing point.

    World Map

    Polluted travel is fine for healthy pawns and ugly for moderate ones.

    Situation Call Reason
    Light buildup, one short polluted stretch Go Healthy pawn + decent headgear usually beats the exposure.
    Moderate buildup and two dirty days Delay Take a roofed rest stop or wait until the pawn is safer.
    Serious buildup and no shelter Abort The caravan can turn a recoverable pawn into an emergency.

    Base Design That Actually Helps

    • Roof the loops that matter first: beds, freezer, hospital, tailoring, batteries.
    • Floor ugly emergency routes before building pretty rooms that still path across poison.
    • Make one indoor animal room so fallout does not turn handlers into rescue crews.
    Fix orderroute > room Best emergency buildroofed barn Top mistakeheld-open doors
    3. Tools, Patches, and What Changed Recently

    Patch Watch

    Useful edge-case reminders for pollution, gravships, and gas cleanup.

    Date Official Change Why You Care
    Aug 28, 2025 Gravships no longer clear pollution on landing. Do not plan around landing tricks to clean toxic ground.
    Jul 29, 2025 Landed gravship gas-dissipation bug fixed. Post-raid cleanup is more predictable around landed craft.
    Aug 6, 2025 Mid-cycle 1.6 shuttle and gravship fixes. Good baseline if your older save feels inconsistent.
    Oct 31, 2025 1.6.4630 stability sweep. Useful compatibility floor for late-2025 toxic advice.

    Odyssey Hazards & Event Data

    Handle toxic vents like objectives, not weather you can wait out forever.

    Ancient Toxic Vent

    Destroy it, avoid it, or route around it. Treat it like a toxic-spewer style problem with local map consequences, not a passive weather card.

    Event Cards & Data

    Local ToxicFallout lasts 2.5 to 10.5 days, has a 90 day minimum refire, and penned animals seek shelter if you built it for them.

    Real Cases, Recap, and Resources

    Short Cases
    • The two-tile leak: fallout kept climbing because the dining room route crossed an unroofed bend.
    • The fake safe room: the bedroom was roofed, but the only food path still crossed polluted dirt.
    • The gas trap flip: closing doors mid-fight mattered more than one more tox shell.
    Action Recap
    • Break exposure first.
    • Lock the route second.
    • Upgrade gear and organs only after the daily loop stops poisoning the pawn.
    Local wiki: ToxicBuildup thresholds and recovery Local wiki: Toxic environment resistance Local wiki: Face mask (Apparel_ClothMask) Related post: Toxic fallout timer and bunker checklist Related post: Airlock fixes for safer sealed routes
    Local files used on this page:
    /game/Data/Core/Defs/HediffDefs/Hediffs_Global_Misc.xml for ToxicBuildup thresholds, lethality, and baseline decay.
    /game/Data/Core/Defs/GameConditionDefs/GameConditions_Misc.xml for the roof rule and penned-animal sheltering.
    /game/Data/Core/Defs/Storyteller/Incidents_Map_Misc.xml for the ToxicFallout duration and refire window.
    /game/Data/Core/Defs/Stats/Stats_Pawns_General.xml for the difference between ToxicEnvironmentResistance and ToxicResistance.
    /game/Data/Core/Defs/ThingDefs_Misc/Apparel_Headgear.xml for the local face-mask craft cost, research, and toxic-environment bonus.
    /app/static/data/rimworld/1.6.4633_rev1266/entities/ThingDef.json for the local healer mech serum description and build-linked entity data.