Maryland Appendix C — Testing the Waters is a document published by the Maryland Department of the Environment (MDE) to provide guidance to local governments on water quality monitoring and testing. The document outlines the requirements for local governments to use in order to develop an effective water quality monitoring program and ensure that water resources are adequately protected. The document provides guidance on the types of testing to be conducted, the frequency of testing, the types of sampling equipment to be used, and the methods for data analysis. It also outlines the necessary procedures for reporting results and other related information. There are three types of Maryland Appendix C — Testing the Waters documents: 1. Testing the Waters: Monitoring and Sampling Guidance for Local Governments and 2. Testing the Waters: Laboratory Analysis and Reporting Guidance for Local Governments 3. Testing the Waters: Reporting Guidance for Local Governments.