In well construction, what does the term "mesh size" refer to?

The term "mesh size" specifically relates to the filter capability of the screen in well construction. It refers to the size of the openings in the screen material that allows water to flow into the well while preventing larger particles, such as sand and gravel, from entering. A smaller mesh size means finer openings, which can filter out more particulate matter but may also reduce the flow rate. Conversely, a larger mesh size allows for greater flow but may also let in larger particles. Understanding mesh size is crucial for ensuring that the well functions efficiently and maintains water quality, as it directly influences the well's ability to provide clean water while protecting the pump and reducing maintenance needs.