Which type of water system includes individual wells under certain conditions?

The type of water system that includes individual wells under certain conditions is best described as a private non-commercial well. Private non-commercial wells are typically owned by individuals or organizations and are used for personal use, such as supplying water for homes or small businesses. These wells are regulated by state and local laws, ensuring they meet safety and quality standards.

In contrast, a public water system refers to a system that is designed to provide water to the public, generally involving more extensive infrastructure and regulation to serve a larger population. Seasonal water supplies are systems that may only operate during certain times of the year, and temporary irrigation systems are designed specifically for agricultural purposes rather than ongoing domestic water supply.