On this day in 1942, Field Marshal Erwin Rommel is brought to a standstill in the battle for control of North Africa. In June, the British had succeeded in driving Rommel into a defensive position in Libya.
Most commercially bottled water will have an expiration date. Even if no expiration date is provided, the shelf life should be approximately one year. For water that comes from your faucet, pumped there by a municipal water source and stored in plastic containers, the water should be replaced every six months.
Most germs die quickly at high temperatures. Water that has been boiled for 1 minute is safe to drink after it has cooled. If no other method of water disinfection is available, very hot tap water may be safe to drink if it has been in the tank for a while. A variety of filters are available from camping stores.