Dirty Water is the unofficial name for regular Water Bottles in this mod. This is because, after drinking an unpurified water bottle, you will gain Nausea for 10 seconds and Slowness for 30 seconds. There is a 5% chance that dirty water can hydrate you, but if it doesn't, you have an 80% chance to receive the Thirst effect for 5 minutes. You can turn dirty water into spring water using a sand filter.