I would say at the hardware store
Carbon
Everpure water filters for the home are sold by WaterFilters, Casa, Filterpros, Filters Fast, Fresh Water Systems, DiscountFilterStore, and WaterFilterExperts.
Affordable everpure water filters can be found at Kohler sinks and faucets as well as large home improvement centers like Home Depot, Lowes or Sears Home and Garden.
Everpure water filters can give you the best tasting water you've ever had. The filters are designed to soften hard water and to remove chemicals found in tap water to ensure water purity.
Many websites sell water filters. One can order water filters off of the websites of Target, Sears, Home Depot, Filters Fast, eBay, and Amazon. One can also go to local stores to purchase water filters.
There are a number of places one can purchase an LT600P water filters. Some examples include House of Filters, Filters Fast, GTA Water, Home Depot and Amazon.
There are many different retailers who offer water filters for sinks. Most home improvement stores like Lowe's and Home Depot carry these types of water filters.
Home water filters provide an enormous amount of benefits; clean safe drinking water for your family, and not to mention the hundreds of dollars you will save on constantly buying bottled water every month.
Home water purification devices are sold at Filters Fast, MSC Industrial Supply, Filters-NOW, Fixture Universe, Walmart, Faucet Depot, Lowe's, and Home Depot.
Camping filters are definitely not the only way to clean water there are many others. For example: Home water filters, reverse osmosis, or distilling your water. But there are many other more scientific ways also.
Information about water filtration systems that can provide whole-house coverage can be found in the DIY sections of Home Depot and Lowes. Commercial grade models can be purchased through All Filters, Culligan and Sears.
Culligan sells whole house water filters, iron water filters, municipal water filters, arsenic water filters and sulfur water filters. They also sell water conditioners.