Toxic water will quench thirst at the cost of significant radiation damage and poses a high risk of disease. Unlike dirty water, toxic water cannot be boiled or filtered.
It can be collected at toxic water sources, which are brown and orange in color, and give the player character 30 rads when entered.
- The repair beacon area at Hornwright Industrial Headquarters.
- Abandoned mine shaft 6.
- Mama Dolce's Food Processing, a river just to the southwest of the plant.
- In the water beneath abandoned mine shaft 3.
- Two can be found in item form at Monongah Overlook - one at the overlook itself, one inside the tent.
- In the basement of Vault-Tec Agricultural Research Center.
- In the building in Bolton Greens.
- Near the waterslides in Wavy Willard's Water Park.