Contaminated water causes Fortitude saves (DC 15 mild to 20 toxic) each hour or take 1d4 CON damage and gain Sickened.
Contaminated water zones are areas with polluted or toxic water -- a chemical spill, a radioactive lake, or a sewage system. The zone is divided into tiers based on toxicity: mild (DC 15), moderate (DC 18), and toxic (DC 20). At each interval (1 hour for ambient zones, 10 minutes for direct exposure), characters inside must make a Fortitude save against the zone's DC. A failed save deals 1d4 Constitution damage; mild zones impose Sickened, while moderate and toxic zones impose Exhausted. Characters wearing water filters or sealed suits gain +4 resistance to these saves.
Rules Reference
Field
Value
Duration / Default Formula
until filtered or exited; ticks at interval
Duration / Type
persistent
Onset / Trigger
entry
Onset / Type
immediate
Prevented By
Water filter / sealed suit, Antitoxin
Save / Dc
15 (mild), 18 (moderate), 20 (toxic)
Save / Interval
1 hour (ambient), 10 minutes (direct exposure)
Save / Type
Fortitude
Stacking
extend
Category
hazard
Effect
description: Failed save deals 1d4 Constitution damage.
Field
Value
description
Failed save deals 1d4 Constitution damage.
modifier
-1d4
target
constitution
description: Mild zones impose Sickened on failed save.
Field
Value
description
Mild zones impose Sickened on failed save.
modifier
sickened
target
condition
description: Moderate and toxic zones impose Exhausted on failed save.
Field
Value
description
Moderate and toxic zones impose Exhausted on failed save.
modifier
exhausted
target
condition
Mitigation
description: Water filter or sealed suit grants +4 resistance.
Field
Value
description
Water filter or sealed suit grants +4 resistance.
description: Antitoxin grants +2 resistance for 1 hour.
Field
Value
description
Antitoxin grants +2 resistance for 1 hour.
description: Medicine check (DC 15) to administer an antitoxin.
Field
Value
description
Medicine check (DC 15) to administer an antitoxin.