Observation wells are specialized boreholes used to monitor groundwater levels and quality. They provide valuable data for understanding aquifer conditions and can help in managing water resources effectively. These wells are typically constructed with a casing that allows water to enter while preventing contaminants from affecting the groundwater. In addition to measuring water levels, observation wells can also be used to collect samples for testing water quality. This information is crucial for environmental studies and hydrology, as it helps scientists and policymakers make informed decisions about water use and conservation.