This document summarizes information about frac sand mining in western Wisconsin. It discusses what frac sand is, where it is located geologically in the region, and how it is used in hydraulic fracturing operations to extract oil and natural gas. It also outlines some of the economic and environmental issues associated with frac sand mining, how regulations aim to address problems related to groundwater, air quality, traffic and noise, and explains that with proper practices, frac sand mining can be conducted safely.