Check the supply, not just the tap symbol
Confirm that drinking water is available during your dates and check for current notices. Seasonal taps may be turned off. Plan for your group, weather, cooking and time between reliable refills, plus a reserve. Keep a separate, clearly labelled container if carrying water that is not for drinking.
Treat an uncertain source with care
Clear-looking stream or lake water can contain germs. Use an appropriate treatment method and follow its instructions. CDC guidance for killing germs by boiling is a rolling boil for one minute, or three minutes above 6,500 feet, then cooling in a clean covered container.
A clear water plan makes everyday camp jobs easier.
Know the limits of treatment
Boiling or disinfecting does not make water containing fuel or toxic chemicals safe. Filters differ in what they remove, so do not assume any filter treats every hazard. If contamination is suspected, choose another reliable source and follow local public-health advice.
Sources & further reading
Read the original guidance for more detail. Product reviews and demonstrations belong to their publishers.