Water Outage: What to Do in the First Hour

Fill everything you own in the first thirty minutes.

Pressure usually holds for a while after a break is reported, and whatever is still sitting in the mains is the last water you will get for free. Tubs, pots, pitchers, bottles, the washing machine drum, a cooler. It does not have to be tidy and it does not have to be sorted. Catch it now and sort it later.

Almost everybody inverts this. They spend the first hour reading about purification and come out of it with two gallons in the house and a filter they did not need yet.

The order that matters

Fill first. Every container, while there is still pressure.

Protect the heater second. There is a valve on the cold pipe entering the top of your water heater. Close it. That isolates 40 to 50 gallons of clean water and stops contaminated water being pulled into the tank behind whatever you draw off. If the outage is a main break, that valve is the difference between a full tank of drinking water and a full tank of whatever came down the street.

Drain the pipes third. There is a gallon or two standing in your plumbing and gravity will hand it over, but only if you let air in first. Open the highest tap in the house, then collect from the lowest, usually a basement tap or an outside spigot. Skip the first step and most of it stays in the pipes.

Count fourth. Now work out what you actually have, including the heater and every toilet tank. Most households find 50 or 60 gallons they did not know about, and the total changes what you do next.

Ration fifth, and only once you know the number. Rationing before you have counted is guessing.

What people get wrong

Toilet tank yes, toilet bowl no. The upper tank holds clean water that never touched the bowl, two to three gallons per toilet. The bowl is never a source. And if you use an in-tank cleaner tablet, that tank is not drinkable either, though it is still fine for flushing.

The water heater needs to cool and settle. It is the largest container in most houses, and drawing it hot is both a scald risk and a mouthful of sediment. Cut the power first, let it stand, and take from the bottom valve once it has settled.

Boiling is for a boil notice, not an outage. If the water simply stopped, what you have stored is fine. Boiling matters when the supply is running but contaminated, which is a different event with different advice, and it only answers half of that. Do not spend the first hour boiling water that was never suspect.

Do not flush if the sewer might be down. During flooding, or if lift stations have lost power, flushing pushes waste back into the lowest fixture in your house. When in doubt, switch to a lined bucket.

Then decide which problem you have

Once you have a number of days, the situation sorts into one of three.

Days of water and a short outage. Stop flushing, hold everything else, wait it out.

Days of water and no end date. Ration properly rather than casually, starting with flushing and showers, and start looking at what you can produce rather than what you can keep.

Not enough days. That is the point to be finding more water rather than conserving what you have, and to be honest with yourself about the difference.

Before the next one

Two things are worth doing on an ordinary afternoon, because neither can be done during the event.

Find the valves. The cold inlet on your heater, the drain valve at the bottom, the breaker or gas control. Knowing which is which in daylight is the difference between a resource and a puzzle.

And keep a bathtub liner in a drawer. Thirty dollars, stores flat, and it turns a tub into 60 to 100 gallons of genuinely clean water in the window before a supply goes off. It does nothing at all if you buy it after.