Storage, Filtration & Safe Drinking Water for Power Outages, Storms, and Utility Disruptions

Off Grid Gear Guy Field Guide

The Simple Water Rule

The baseline emergency water target is:

1 gallon per person, per day

That amount is for drinking, basic cooking, brushing teeth, and minimal hygiene. FEMA and CDC both use the one-gallon-per-person-per-day rule, and the CDC recommends storing at least a 3-day supply, with a 2-week supply if possible.

Minimum Starter Goal

Household Size	3 Days	7 Days	14 Days
1 person	3 gallons	7 gallons	14 gallons
2 people	6 gallons	14 gallons	28 gallons
3 people	9 gallons	21 gallons	42 gallons
4 people	12 gallons	28 gallons	56 gallons
5 people	15 gallons	35 gallons	70 gallons
6 people	18 gallons	42 gallons	84 gallons

Add More Water For

• • Hotter climates

• • Pregnant women

• • Nursing mothers

• • Infants

• • Elderly family members

• • Sick family members

• • Pets

• • Medical needs

• • Heavy cleanup after storms

The CDC specifically recommends storing more water for pregnant women, people with illnesses, pets, and households in hotter climates.

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Your Family Water Calculator

Use this simple formula:

Number of people × number of days = gallons needed

Example:

A family of 4 preparing for 7 days:

4 people × 7 days = 28 gallons

Now add pets.

Pet Water Estimate

Use this as a simple planning number:

• • Small dog/cat: ¼ to ½ gallon per day

• • Medium dog: ½ to 1 gallon per day

• • Large dog: 1 gallon or more per day

My Household Water Plan

Number of people: _______

Number of pets: _______

Days prepared for: _______

Water needed for people: _______ gallons

Water needed for pets: _______ gallons

Total household water target: _______ gallons

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The Three-Layer Water System

Do not rely on one type of water storage. A strong family water setup has three layers:

Layer 1: Ready-to-Drink Water

This is bottled water or sealed drinking water that you can use immediately.

Best for:

• • First 24–72 hours

• • Kids

• • Elderly family members

• • Evacuation

• • Boil-water advisories

• • Fast access at night

Good options:

• • Cases of bottled water

• • Gallon jugs

• • Sealed emergency water boxes or pouches

Your goal:

Keep at least 3 days of ready-to-drink water available.

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Layer 2: Bulk Stored Water

This is your larger home supply.

Best for:

• • Multi-day outages

• • Hurricanes

• • Utility disruptions

• • Shelter-in-place events

• • Cooking and hygiene

Good options:

• • 5-gallon water containers

• • 7-gallon water jugs

• • Stackable water bricks

• • Larger food-grade water barrels

Use only food-grade containers designed for drinking water storage. CDC guidance says safe storage includes clean containers with tight-fitting lids, and stored water should be kept cool, out of direct sunlight, and away from gasoline, pesticides, and other toxic substances.

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Layer 3: Treatment Backup

This is your safety net if stored water runs low or if tap water becomes questionable.

Best for:

• • Boil-water advisories

• • Flooding

• • Storm damage

• • Unknown water quality

• • Longer disruptions

Treatment tools may include:

• • Stove or camping stove for boiling

• • Water filter

• • Water purification tablets

• • Unscented household bleach suitable for disinfection

• • Clean cloth, coffee filter, or paper towel for pre-filtering cloudy water

The CDC notes that boiling is one of the surest ways to kill disease-causing organisms in water, while chemical disinfectants can kill many germs but may not work as well against certain parasites.

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What to Buy First

Start with the basics. Fancy gear can help, but plain water is what matters most in emergencies.

First $25–$50

Buy:

• • 3 cases of bottled water

• • 1 permanent marker

• • 1 roll of masking tape or water-resistant labels

• • 1 manual can opener (if you do not already have one)

Do this:

• • Write the purchase month/year on each case.

• • Store in a cool, shaded place

• • Keep one case easily accessible.

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First $100–$150

Buy:

• • 4 to 6 cases of bottled water

• • 2 food-grade 5-gallon water containers

• • 1 basic water filter

• • 1 pack of purification tablets

• • Unscented household bleach labeled for disinfection/sanitization

Do this:

• • Fill and label containers.

• • Create a water station.

• • Print this guide and place it nearby.

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Strong Family Setup

Buy:

• • 3-day bottled water supply

• • 7-to-14-day bulk water supply

• • Water filter

• • Boiling method

• • Purification tablets

• • Bleach backup

• • Collapsible container for extra water

• • Small water bottles for evacuation bags

• • Pet water supply

Do this:

• • Label everything

• • Store in multiple areas

• • Rotate on a schedule.

• • Practice using your filter before you need it.

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Where to Store Emergency Water

Good storage places:

• • Pantry floor

• • Interior closet

• • Laundry room shelf

• • Under beds

• • Garage interior wall, if not too hot

• • Utility room

• • Hall closet

• • Storm supply shelf

Avoid storing water:

• • In direct sunlight

• • Near gasoline

• • Near pesticides

• • Near paint, solvents, or chemicals

• • In hot vehicles, long-term

• • On weak shelving

• • In containers not meant for drinking water

CDC safe storage guidance recommends keeping water containers cool, out of direct sunlight, and away from toxic substances.

Pro Tip:

Do not put all your water in one place.

A smart setup has:

• • Some water near the kitchen

• • Some near bedrooms

• • Some are near your evacuation gear.

• • Some in the garage or utility area

Water is heavy, so make sure to spread out the weight.

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How to Label Your Water

Every water container should have a simple label.

Use this format:

DRINKING WATER
Filled on: __________
Rotate/check on: __________
Container size: __________ gallons

For bottled water cases, write the purchase month and year on the outside.

Example

DRINKING WATER
Filled on: July 2026
Rotate/check on: January 2027
Size: 5 gallons

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Water Rotation Plan

For store-bought bottled water:

• • Follow the manufacturer’s date when available.

• • Inspect every 6 months.

• • Replace if bottles are damaged, leaking, cloudy, or smell unusual.

For home-filled containers:

• • Check every 6 months.

• • Replace if the container leaks, smells odd, looks cloudy, or has been exposed to heat/chemicals.

• • Keep the container sealed unless using it.

Easy Rotation Trick

Tie water rotation to dates you already remember:

• • New Year’s weekend

• • Start of hurricane season

• • Daylight saving time changes

• • Your birthday month

• • First weekend of summer

“Preparedness works best when it fits into habits you already have.”

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Boil-Water Advisory Action Plan

A boil-water advisory means local officials believe tap water may contain germs that can make people sick.

During a boil-water advisory, use bottled water or boiled tap water for:

• • Drinking

• • Brushing teeth

• • Making coffee

• • Preparing food

• • Washing fruits and vegetables

• • Making ice

• • Mixing baby formula, unless officials give different instructions

• • Giving water to pets

The CDC says to bring clear water to a rolling boil for 1 minute; at elevations above 6,500 feet, boil for 3 minutes. Boiling kills germs, but it does not remove chemicals, so local instructions matter.

Boil-Water Steps

1. 1. Fill a clean pot with water.

1. 1. If the water is cloudy, let it settle, then filter it through a clean cloth, paper towel, or coffee filter.

1. 1. Bring clear water to a rolling boil.

1. 1. Boil for 1 minute.

1. 1. Let cool naturally.

1. 1. Store in a clean, covered container.

1. 1. Label as “boiled drinking water.”

Important

Boiling does not remove chemical contamination. If officials issue a “do not drink” advisory, use bottled water instead.

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Emergency Water Disinfection Backup

Boiling is preferred when possible.

If you cannot boil water, the EPA says that household bleach may be used to disinfect water, but only regular, unscented bleach suitable for disinfection and sanitization. Do not use scented bleach, color-safe bleach, or bleach with added cleaners.

Before Disinfecting Cloudy Water

If water is cloudy:

1. 1. Let it settle.

1. 1. Filter it through a clean cloth, coffee filter, or paper towel.

1. 1. Use the clearer water for treatment.

The EPA recommends this settling and filtering step before disinfection when water is cloudy.

Safety Notes

• • Follow the bleach label.

• • Never mix bleach with ammonia or other cleaners.

• • Use only regular unscented bleach.

• • Store bleach safely away from children.

• • When in doubt, use bottled water.

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Water Filter Decision Guide

A filter is not a cure-all. Different filters solve different problems.

Use this simple decision guide:

If your water may have germs

Best options:

• • Boiling

• • Purification tablets

• • Filter rated for bacteria/protozoa, followed by disinfection if needed.

If your water may have dirt or sediment

Best options:

• • Let settle

• • Pre-filter through a clean cloth or a coffee filter

• • Use a water filter

If your water may have chemicals

Best option:

• • Use bottled water

• • Follow local emergency instructions.

Boiling kills many disease-causing organisms, but it does not remove chemicals.

If you are under a boil-water advisory

Best options:

• • Bottled water

• • Boiled water

• • Follow local instructions

Do not assume a basic pitcher filter makes unsafe tap water safe during an advisory.

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The Family Water Depot

Create a single, designated location for emergency water supplies.

Your water station should include:

• • Bottled water

• • Bulk water containers

• • Water filter

• • Purification tablets

• • Unscented bleach backup

• • Measuring spoon/dropper if needed

• • Permanent marker

• • Labels or masking tape

• • Printed instructions

• • Clean funnel

• • Clean pot

• • Pet bowl

• • Small flashlight

Best Location

Choose a place that is:

• • Cool

• • Dry

• • Easy to reach

• • Away from chemicals

• • Not blocking exits

• • Strong enough to support heavy containers

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Room-by-Room Water Plan

Kitchen

Keep:

• • Bottled water

• • Boiling pot

• • Filter

• • Clean containers

• • Printed boil-water steps

Bedrooms

Keep:

• • 1–2 bottles per person

• • Flashlight nearby

• • Water for nighttime medication needs

Bathroom

Keep:

• • Hand sanitizer

• • Wipes

• • Small water container for hygiene only, clearly labeled if not drinking water.

Garage or Utility Area

Keep:

• • Bulk water

• • Larger containers

• • Backup filter

• • Extra bottled water

Vehicle

Keep:

• • Small water bottles

• • Avoid using vehicle water as your primary long-term supply, as heat can be a problem.

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First 10 Minutes After the Tap Stops Working

When water pressure drops, tap water stops, or a boil-water alert hits, do this:

1. 1. Stop drinking tap water until you know what is happening.

1. 1. Check local emergency alerts.

1. 1. Put bottled water on the counter.

1. 1. Fill clean containers if officials say tap water is still usable.

1. 1. Turn off automatic ice makers if water quality is questionable.

1. 1. Put a note by the sink: “Do not drink tap water.”

1. 1. Start using your stored water plan.

1. 1. Check on children, elderly family members, pets, and neighbors if appropriate.

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Special Household Considerations

Babies

Store extra water if your household uses formula. During advisories, follow local public health instructions carefully.

Medical Needs

Store extra water for:

• • Medications

• • CPAP cleaning

• • Wound care

• • Mobility limitations

• • Heat-sensitive health conditions

Pets

Pets need emergency water too. Keep the pet’s water near the pet food and evacuation supplies.

Apartments

Apartment-friendly water options:

• • Bottled water cases

• • Stackable water bricks

• • Under-bed containers

• • Collapsible containers

• • Bathtub water bladder for non-drinking emergency water if filled before an outage

Seniors

Keep smaller containers available. Five-gallon containers are useful but heavy.

One gallon of water weighs about 8.3 pounds. A 5-gallon container weighs more than 40 pounds when full.

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Common Water Preparedness Mistakes

Avoid these:

• • Storing too little water

• • Forgetting pets

• • Keeping water near chemicals

• • Using random containers not meant for drinking water

• • Buying a filter but never testing it.

• • Assuming boiling removes chemicals.

• • Storing everything in the garage in extreme heat

• • Forgetting to turn off the water for brushing teeth and hygiene

• • Waiting until a storm is already coming

• • Relying only on bottled water from stores

Relying on the grocery store as an emergency plan is not a good idea, since everyone else will be doing the same!!

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Your 30-Minute Water Setup

Use this if you want to start today.

Minute 1–5: Calculate

Number of people: _______

Number of pets: _______

3-day water target: _______ gallons

7-day water target: _______ gallons

Minute 5–15: Gather

Find what you already have:

• • Bottled water

• • Empty food-grade containers

• • Filter

• • Pot for boiling

• • Bleach

• • Labels

• • Marker

Minute 15–25: Organize

Create one water station.

Label:

• • Drinking water

• • Hygiene water

• • Pet water

• • Filter

• • Treatment backup

Minute 25–30: Buy List

Write down what is missing:

• • Bottled water

• • Bulk containers

• • Filter

• • Purification tablets

• • Extra pet water

• • Labels

• • Storage shelf

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Shopping List

Basic Starter List

• • Bottled water cases

• • 2 food-grade 5-gallon containers

• • Permanent marker

• • Labels or masking tape

• • Water filter

• • Purification tablets

• • Unscented bleach suitable for disinfection

• • Clean funnel

• • Clean pot for boiling

Strong Family Setup

• • 3-day bottled water supply

• • 7-to-14-day bulk water supply

• • Water filter

• • Backup filter cartridges

• • Purification tablets

• • Unscented bleach

• • Collapsible water container

• • Small bottles for go-bags

• • Pet water containers

• • Printed water plan

• • Storage rack or shelf

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Printable Checklist

Emergency Water Setup Checklist

Calculate

[ ] Count household members
[ ] Count pets
[ ] Calculate 3-day water need
[ ] Calculate 7-day water need
[ ] Calculate 14-day water goal

Buy

[ ] Bottled water
[ ] Food-grade storage containers
[ ] Water filter
[ ] Purification tablets
[ ] Unscented bleach backup
[ ] Labels
[ ] Permanent marker
[ ] Clean pot for boiling
[ ] Funnel
[ ] Pet water supply

Store

[ ] Store water in a cool place
[ ] Keep away from chemicals
[ ] Keep out of direct sunlight
[ ] Spread water across more than one area
[ ] Keep some water easy to access
[ ] Label all containers

Prepare

[ ] Print boil-water instructions
[ ] Test water filter
[ ] Teach the family where the water is stored
[ ] Add water to evacuation bags
[ ] Add water to vehicle kit
[ ] Set rotation date

Review

[ ] Check every 6 months
[ ] Replace damaged bottles
[ ] Inspect containers
[ ] Refresh home-filled water if needed
[ ] Update household needs

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Adopt this New Water Preparedness Standard

A prepared family should have:

Good

3 days of drinking water stored.

Better

7 days of drinking water stored, plus a basic filter.

Best

14 days of water, a filter, a boiling method, treatment backup, pet water, labels, and a rotation schedule. Start with the basics, work toward a better setup, and aim for the best you can do. Preparedness is not just a personality trait; it is a system for your household.

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Final Family Water Plan

Household members: _______

Pets: _______

Minimum 3-day water target: _______ gallons

Preferred 7-day water target: _______ gallons

Longer 14-day water target: _______ gallons

Primary water storage location: __________________________

Backup water storage location: __________________________

Water filter location: __________________________

Boiling supplies location: __________________________

Rotation/check date: __________________________

Person responsible for checking supplies: __________________________

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Closing Note

Getting ready for water emergencies does not have to be dramatic.  You do not need a bunker, a panic room, or a garage packed with blue barrels to get started.  You need a clear number, clean containers, a safe storage spot, and a simple backup plan.

Start with three days. Then build to seven. Then build to fourteen, because simple, steady routines are always better than last-second panic.