Is tap water safe during a power outage? Usually until a notice says otherwise, but pressure loss can cause problems. When to boil and how to store water.
- Municipal water often stays safe, but loss of pressure can allow contamination.
- Follow boil water advisories from your local authority, and do not drink water that looks or smells off.
- Store water before storms; wells with electric pumps stop working without power.
In many outages tap water keeps flowing, but not always. Here is what to watch for.
City water
Treatment plants and pumps often have backup power, but long outages or low pressure can cause problems. Listen for notices from your local authority and follow boil water advisories exactly.
Boiling and treating
Health Canada gives steps for making water safe in an emergency. See the Health Canada page in the sources. For filters, see water filter comparison.
Wells
An electric pump stops without power. Read well pump in an outage.
Store water
Keep stored water: how much and how long it lasts. You can also use your water heater tank in an emergency.
Backup power picks (Canada)
Size the unit to your own load first: see the sizing guide.
Quick comparison
| Brand | Best for |
|---|---|
| BBerkey | Countertop gravity filter systems |
| FFrizzlife | Home countertop and under-sink filters |
| LLifeStraw | Portable filters for backup and travel |
Gravity filters for stored or questionable water, no power needed.
- Gravity-fed, no pump needed
- Check which contaminants each model is rated for
- Plan how you will refill and clean it
Countertop and under sink filters, and emergency water options.
- Systems for daily home use
- Compare certifications and filter life
- Check replacement cost
Compact filters for a go bag or kit.
- Straw, bottle and larger formats
- Handy as a backup, not your main supply
- Check exactly what each model removes
Quick answers
Is tap water safe in a power outage?
Usually, until a notice says otherwise. Follow local advisories.
What if there is a boil advisory?
Boil water as instructed by your authority.
What about a well?
The pump stops without power. Store water.