A boil water advisory is a public notice from the water provider telling customers to bring tap water to a rolling boil before using it for drinking, cooking, making ice, brushing teeth, or washing food. In Washington, notices usually go out through the local water system's website, local news, and automated calls or door hangers. Read the full notice, since it names the affected area and the conditions for lifting the advisory.
An advisory is usually issued when a main breaks, water pressure drops, or testing raises a question about the water. Pressure loss matters because it can allow outside water to enter pipes. The advisory is a precaution while the provider confirms the water is safe, and only the provider lifts it. Clear, odorless water can still need boiling, so appearance alone is not a reliable signal.
Wait for the official all-clear
Do not stop boiling because the water seems normal or because a neighbor says the advisory is over. Look for a notice from the provider stating that the advisory has been lifted. Some systems also ask customers to run cold taps for a while after the all-clear. Follow those instructions exactly, and keep boiling until you have the notice in hand.
Flush the lines and fixtures
Pressure changes can stir up sediment and leave air or debris in lines, so flushing helps clear the home's plumbing.
- Run each cold tap in the home for several minutes, starting with the one farthest from the main shutoff.
- Run hot taps after the cold lines, then check that the water runs clear and steady.
- Remove faucet aerators and shower heads, rinse out any debris, and reinstall them.
- If the water heater was drained or off during the event, flush it according to the manufacturer's directions before relying on it.
Clean what touched the water during the advisory
- Throw out ice made during the advisory, then clean the ice bin and refill it with water you have confirmed is clear.
- Run fresh water through the coffee maker, kettle, and any humidifier that was used during the advisory.
- Replace the cartridge in a refrigerator or under-sink filter if you use one, following the maker's instructions, since a filter used during an advisory may be loaded with material.
- Run a clean cycle in the dishwasher and washing machine before the next full load.
What a softener or filter does and does not do
Washington's tap water is described in local reports as very hard, with iron, combined radium, and gross alpha also noted. A boil advisory deals with microbial safety, which is a separate issue from those mineral and radioactivity topics. A water softener mainly reduces hardness minerals, so it does not make water safe to drink during an advisory. Boiling kills many microbes, but it does not remove dissolved minerals or metals, and it does not remove radium. Before counting on any filter, check whether it is certified for the specific contaminant you are concerned about.
If you have a private well
A city boil advisory does not cover a private well. Wells are unregulated, so nobody tests yours except you. Flooding, heavy rain, and nearby surface water can carry coliform bacteria and E. coli into a well. Washington sits in Franklin County, and homes in the Missouri River-bottom area have particular reason to check their wells after high water. After any flood or nearby advisory, have the well tested for total coliform and E. coli by a state-certified or accredited lab. Ask the lab for sampling instructions, because the sample must be collected without contamination. A bacteria test will not show hydrogen sulfide, iron, hardness, nitrate, or radium, so request those separately if you suspect them. Deeper bedrock wells in the region can carry naturally elevated radium, so including radium in your test is a reasonable request.
If a well tests positive for coliform or E. coli, follow the lab's and the county health office's guidance and have a licensed well contractor inspect and disinfect the system before you resume normal use.
Keep a simple record
- Save the advisory notice and the all-clear notice with their dates.
- Note which fixtures you flushed, when you did it, and what you cleaned.
- Keep any well test results in the same folder so you can compare them over time.
When to call for help
Contact the water provider's office if the notice is unclear or if your water still looks or smells wrong after the all-clear. For a private well with a positive result, contact a licensed well contractor or your county health office. Ask questions in writing when possible, so you have a record of the answers.