A creature requires an amount of water per day based on its size, as shown in the Water Needs per Day table. A creature that drinks less than half the required water for a day gains 1 Exhaustion level at the day's end. Exhaustion caused by dehydration can't be removed until the creature drinks the full amount of water required for a day. See also "Exhaustion."
Table: Water Needs per Day
| Size | Water | Size | Water |
|---|---|---|---|
| Tiny | 1/4 gallon | Large | 4 gallons |
| Small | 1 gallon | Huge | 16 gallons |
| Medium | 1 gallon | Gargantuan | 64 gallons |