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Scenario 10 · America's most common utility emergency

What to Do in a Water Outage or Boil Water Advisory

Thousands of boil water advisories happen every year, and most households improvise through them. The stored-gallon math below makes the next one a non-event.

Updated July 2026 · Boil and disinfection guidance follows the CDC and EPA

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Quick answer

Water emergencies come in two flavors: no water, from main breaks and pump failures, and unsafe water, the boil advisory. The plan covers both: one gallon per person per day stored for 3 days, a rolling boil for one full minute when advised, and the non-obvious rules people miss, like ice makers and coffee machines counting as raw tap. Store the gallons once and every advisory after that is a shrug.

Numbers are set for 4 people. Change your household size below and every quantity updates.

1 min

Rolling boil makes water safe

1 gal

Per person per day, minimum

8 drops

Plain bleach per gallon, backup method

The ice maker

The advisory rule everyone forgets

How a water emergency actually unfolds

The notice

A text, a knock, or a news alert: main break, pressure loss, or contamination detected. From this moment, the tap is either dry or suspect.

Hour 1

Switch the house to stored water, kill the ice maker, tape a note over the coffee machine, and start the first boil batch cooling in a pitcher.

The advisory days

Drinking and cooking from stored and boiled water, dishes with a bleach-rinse step, showers fine for adults with mouths closed. Life, slightly annotated.

The all-clear

Flush every tap cold for five minutes, dump the ice maker's first three batches, replace filter cartridges, and restock the stored gallons.

Play it out

One advisory weekend, three decisions

A Friday-night boil water advisory, played honestly.

Scene 1 of 3

Friday, 9pm. A city text: water main break, boil water advisory until further notice. The kitchen holds one half-empty case of bottled water and a full ice maker bin.

Prefer to read it straight through?

Scene 1

Friday, 9pm. A city text: water main break, boil water advisory until further notice. The kitchen holds one half-empty case of bottled water and a full ice maker bin.

If you half a case will stretch. deal with it tomorrow: Saturday morning discovers that coffee, cereal, the dog bowl, and teeth-brushing all wanted water before 9am. The half case dies by noon, and you join the store line where pallets are going out as fast as they land.

If you start the boil rotation tonight and inventory the real need: Two big pots boil while you watch a show: one full minute at a rolling boil, then into pitchers to cool overnight. By morning there are two gallons ready, the math says the household needs four a day, and the rotation is already ahead of demand.

Field note: A rolling boil for one full minute is complete treatment for advisory-grade water. The trick is running it as a background rotation, not a crisis: two pots a night stays ahead of a family's needs.

Scene 2

Saturday, 8am. Half-asleep, you pour cereal, and someone's glass fills at the fridge door dispenser. It tastes completely normal. The advisory scrolls along the bottom of the morning news.

If you it went through the fridge filter. it's fine: The everyday mistake, made in kitchens across the whole advisory zone this morning. Carbon filters polish taste; they do not disinfect. Odds are genuinely good it is harmless, and odds are what advisories exist to remove. Watch for symptoms, carry on smarter.

If you dump it, and tape off the dispenser and ice maker: Thirty seconds with painter's tape turns the fridge's water features off-limits even for autopilot hands. This is the discipline that makes an advisory boring: raw tap has exactly zero remaining pathways into a glass.

Field note: Fridge filters, pitcher filters, and ice makers do not make advisory water safe: carbon improves taste, it does not disinfect. Tape is how you beat muscle memory.

Scene 3

Sunday evening. The all-clear arrives: advisory lifted. The family cheers and someone immediately reaches to refill the water pitcher straight from the tap.

If you advisory's over. fill everything: The lines in your own house still hold the water that sat through the advisory. Almost always fine, and flushing exists because almost is doing work in that sentence. The pitcher gets refilled with day-old advisory water and nobody knows the difference, probably.

If you run the post-advisory reset first: Every cold tap runs five minutes, the ice maker's next three batches go down the drain, the fridge filter goes on the replacement list, and THEN the pitcher fills. Fifteen minutes of protocol closes the event completely.

Field note: The all-clear covers the utility's pipes, not the water sitting in yours. Flush cold taps five minutes, dump three ice batches, and swap filters that drank advisory water.

The water outage checklist

People in your household

One page per scenario: quantities resize in place, and the link you share always shows this plan.

Your head start

0 of 3 days covered

0 of 12 essentials on hand

Tick what you already own.Save this as your real plan →

Supplies buy you days. Gear keeps those days livable. Most families discover they start around day 3.

ItemFor 4 peopleWhy it mattersCovers
Water · 12 gallons total
Bottled water, 24-pack cases3 cases (about 7 gal)Sealed, portable, splits between rooms and the car.All days
5-gallon water jugs1 jugThe cheapest gallons you can store. Fill spares before the event, not during.Backup
Water purification tablets1 packTurns suspect tap or tub water into drinking water after day 3.Backup
Treatment, three ways
A big stockpot with a lid2The boil rotation's engine: two pots a night stays ahead of a family.Method 1
Plain unscented bleach and a dropper1 bottle8 drops per gallon, 30 minutes, when boiling is not an option. Plain only, never splashless or scented.Method 2
Water purification tablets1 packThe zero-effort backup that lives in the kit for years.Method 3
Painter's tape1 rollGoes over the ice maker, the fridge dispenser, and the coffee machine on day one.Discipline
Hygiene without the tap
Hand sanitizer pumps2 pumpsHandwashing is the biggest hidden water cost in an outage.Daily
Paper plates and cups for the duration3 days worthEvery dish not washed is half a gallon banked.Daily
Unscented baby wipes2 packsField-tested hygiene when showers are off the table.Daily
Health and documents
First aid kit1Minor injuries spike during cleanup, exactly when help is hardest to reach.All week
Prescription medications14-day supply eachPharmacies reopen slowly. Ask your pharmacist about an emergency refill before you need it.2 weeks
Documents in a waterproof bagIDs, insurance, cash in small billsATMs and card readers die with the power.Grab and go
Manual can opener1Most of the calories above are locked inside cans without it.Critical

The stored gallons below are the entire difference between an advisory being a crisis and a footnote. Print this page to take it shopping.

In the app

Know your gallons before the advisory text arrives

Provision Planner has a built-in Water Outage scenario. It tracks stored gallons against your household's real daily need, flags bottled water aging out, and its alerts carry local advisories so the notice and the plan arrive together.

Run the water outage scenario

Frequently asked questions

How long do I boil water to make it safe?

Bring it to a full rolling boil for one minute (three minutes above 6,500 feet), then let it cool. That treats bacteria, viruses, and parasites at advisory grade. Boiling longer wastes fuel and water to evaporation without adding safety.

Can I shower during a boil water advisory?

Yes, adults and older kids can shower with care not to swallow water. Use boiled or bottled for brushing teeth, and give babies and young children sponge baths instead. Open cuts merit bottled-water cleaning.

Does my fridge or pitcher filter make the water safe?

No. Household carbon filters improve taste and odor; they are not certified to remove advisory-grade microbial contamination. During an advisory, the fridge dispenser and ice maker count as raw tap, and their filters should be replaced after the all-clear.

How much bleach disinfects water, and what kind?

8 drops of plain, unscented household bleach (6% sodium hypochlorite) per gallon of clear water, stirred and left 30 minutes; double for cloudy water. Never use scented, splashless, or color-safe bleach. It should smell faintly of chlorine at the end; if not, repeat once.

Explore more scenarios

Every scenario gets the same treatment: the event, the supplies, the timeline, and your number.

Go deeper: 3-Day Supply Plan for 4 People · Food Storage Calculator

Boil, bleach, and post-advisory guidance follows the CDC and EPA. This is general planning guidance: immunocompromised household members merit bottled water throughout any advisory. Photography: NASA image library and Pexels, used under their respective licenses.