Which classification is a PWS that supplies water to the same population year-round?

• A. Non-Transient Non-Community Water System
• B. Transient Non-Community Water System
• C. Seasonal Community Water System
• D. Community Water System

Answer: (D)

Public water systems are categorized by who they serve and for how long. If a system provides drinking water to the same group of people year-round, it is a Community Water System. This distinguishes it from seasonal systems (which serve the same people only part of the year), and from non-transient non-community or transient non-community systems (which serve people who are not regular residents). So the classification that fits supplying water to the same population year-round is a Community Water System.