Quick answer: Loss of electricity alone does not tell you whether your tap water is safe. Check the notice from the operator serving your address. A system may keep operating with backup power, while another can lose pumping, pressure or treatment. Restored flow is not a drinking-water clearance.
Identify the supply serving your home
Record whether your drinking water comes from a public utility, private well or a building system supplied by a utility. Keep the responsible operator’s alert page and phone number. The electric utility’s restoration estimate is useful for electricity, but it does not answer the water-quality question.
EPA provides incident checklists specifically for water utilities, including power outages. The response depends on the system; do not assume a neighbor on a different supply has the same instructions.
Check the address and the latest notice
- Open the water utility or public-health alert source.
- Confirm that your address is inside or outside the affected area.
- Read the exact type of notice and each permitted use.
- Save its date and the stated clearance conditions.
If the supply’s status is unclear, use an available known-safe drinking-water source while contacting the operator. Clear appearance, a normal smell or restored pressure does not establish that an applicable advisory has ended.
Three notices require different responses
| Notice | Main distinction |
|---|---|
| Boil water | Follow the specified boiling or alternative-water instructions for germ risks. |
| Do not drink | Use the instructed alternative for drinking and cooking; do not assume boiling solves the reason. |
| Do not use | Avoid the affected water as directed, including contact uses. |
CDC explains these categories; the actual local notice supplies the task-specific instructions. Keep it with the household water station so someone else does not apply boil-water rules to a chemical-related restriction.
If you have a private well
A utility clearance may not cover your well. Contact the responsible local health or well service provider about the specific outage, any flooding and the condition of the system. CDC cautions that water suspected of fuel or toxic chemical contamination cannot be made safe by routine emergency treatment. Use the instructed alternative supply; do not build a treatment recipe around an unidentified problem.
What to ask before restarting normal use
- Is the water approved for drinking at my address?
- Are there separate flushing or appliance instructions?
- Does the clearance cover my supply type?
- Where will an updated notice appear?
Record the answer and notice date. This small decision log separates electricity restoration, water-flow restoration and water-use clearance, which may happen at different times.
If boiling is required, use the advisory preparation guide. Check refrigerator water and ice separately, and follow local permission for handwashing water.
Sources
Official guidance checked on October 13, 2026. Household checklists are planning aids; local instructions and system-specific directions take priority.