There are many different forms of water filtration systems and water purifiers available for household use. Some, like carafe filters and faucet-mounted filters, are slow and ineffective at removing many common contaminants. Others, like under-sink filters and whole house filters, are costly to install and maintain, and require professional installation. Of the filtration options available that also works as an arsenic water filter, reverse osmosis provides the most complete removal of contaminants.
A countertop reverse osmosis system is an excellent option for those who want complete water purification without the difficulty and space issues of a traditional under-sink RO system.