Market Definition by Product:

For the purposes of this study a residential water treatment (RWT) system is defined as:

Point-of-use (POU) systems: Point-of-use (POU) systems are intended to filter water for drinking and cooking purposes. They are typically installed at the point where the water is used. For purposes of this study, POU systems are further segmented as counter top systems, under-the-sink systems, and faucet mount systems.

Point-of-entry (POE) systems: Point-of-entry or whole house systems treat all the water entering the home.

Point-of-use counter top (CT) systems: Counter top systems can either be placed on the kitchen counter or can be wall mounted (typically in Asia). 

Point-of-use under-the-sink (UTS) systems: The UTS systems are usually placed under the kitchen sink and do not clutter the kitchen counter.

Point-of-use faucet mount (FM) systems: FM systems have small filters that go directly on the end of a faucet and are relatively easy to install. FM systems have low capacities and low flow rates as compared to pitchers and other types of water treatment systems.

Pitcher systems: These systems are also knows as jug filters in certain parts of the world. Water is filtered by gravity through a filter cartridge, mostly made up of carbon. Pitchers and faucet mount systems are cheap residential water treatment systems available to consumers.

Replacement filters: Include cartridges, membranes, or other filters that need to be replaced regularly for the system to perform efficiently. This report covers replacement filters.