DATA DISCLAIMER: Some data are preliminary and subject to revision until they have been thoroughly reviewed and receive final approval. Not all data is used for Clean Water Act regulatory purposes, such as 305(b)/303(d) listing. Some data collected by third-parties cannot be validated by EPD; therefore, we cannot guarantee data accuracy and may not know the analytical methods used. The data should be used with caution before making decisions concerning personal/public safety or conducting business that involves substantial monetary or operational consequences. Groundwater wells and springs monitoring data can only be found using the Advanced Search.