For example, I regularly plug a Micro USB cable into an iPhone charger and charge with that. Cheap, non phone chargers however, may not be regulated, and that could damage your phone. In short: Any cable or charger from an old phone is fine to use if its Micro USB (same connector).
Untreated surface water in rivers, streams, lakes, and ponds is not safe to drink unless it is treated to remove bacteria, viruses, and parasites.
Water from the hot tap is not recommended for drinking as it often contains elevated levels of metals such as copper which makes the water taste astringent. Cold water in bathrooms and wash rooms is not recommended for drinking as it may be from a tank that is not suitable for drinking water purposes. You can find advice on what to do if your drinking water comes from a tank here.