How Much Drinking Water to Store for Emergencies Calculator

Why You Need an Emergency Water Supply

Picture this: You wake up one morning, shuffle to the kitchen for your first cup of coffee, and turn on the tap. Nothing. You try again. Still nothing. A water main broke overnight, and the city has shut down service to your entire neighborhood. No timeline for repairs yet—could be hours, could be days. How much water do you have on hand right now?

Most of us take clean, running water completely for granted. According to the EPA, the average American uses between 80 and 100 gallons every single day for drinking, cooking, washing dishes, showering, and flushing toilets. That's enough to fill a standard bathtub more than twice. We barely think about it until the moment we turn the faucet and nothing comes out. Hurricanes, earthquakes, floods, winter storms, infrastructure failures, and even contamination events can all disrupt water service without warning. When disaster strikes, bottled water disappears from store shelves within hours, leaving unprepared families scrambling.