A portable water purifier is a great tool to have with you whether you are traveling abroad to a third world country, or simply "living off the land" on a camping weekend! UV light as a water purification system is tested and effective!
UV Light Purification as an Alternative to the Water Filter Systems
When you are heading out on a hike you want to take only what you need and still make your pack as light as possible, a UV water filtration system can go a long way to lightening your load. You obviously know how important it is to keep yourself hydrated when you are hiking on the trail. Those store-bought plastic bottles of water are convenient for you to get but you probably will need more than one or two bottles while you're on the trail and let's face it those can get really heavy. Having a way to purify the water available to you on the trail is ideal.
Backpack filters are good for such an occasion but they can be bulky and time consuming to filter and annoying to use if the water is already pretty clear. The beauty of a UV light filtration system is that the system is very small and compact. It is generally not much bigger than a good sized pocket knife and often weighs less than a pound. They are easy to use and you don't have to worry about wearing your arm out pumping the water.
These little lights are simple. You simply go to what every water source you have available. Fill your container with the water, stick the UV light filtration system into the water and turn it on. Each light is slightly different on the exact length of time that you need to expose the water volume before it is considered purified. You will need to follow your instructor guide on this part, generally though you will have a 16 ounce bottle purified in just under a minute. Once the time is up simply turn off the light and remove it from the bottle. That's it, no pumping required.
These lights will kill 99% of bacteria, viruses and common protozoans. They are very affective and you don't have to worry about clogging or cleaning. Simply wipe off the light and put the cover back on it. They do have one big draw back and that is the fact that if the water is dirty with sludge and dirt then you will simply be drinking purified muddy water. The taste and dirt will still be there.
UV light purifiers are great for those who know they are going to an area that has clear water but are unsure of what microscopic undesirables might be lurking in the water.