Surface Water:  The District conducts water monitoring activities on the rivers and their tributaries in Cortland County.  Goals of monitoring include better defining the status of water quality, identifying new challenges and supporting larger scale efforts such as harmful algal bloom monitoring.  Surface water quality concerns include excess nutrients, sediments and sodium chloride (salt), high or low pH, and low dissolved oxygen.

Groundwater: The District also monitors groundwater in Cortland County in support of local municipalities’ efforts to protect drinking water supplies.  Water quality concerns in Cortland County groundwater includes trichloroethene (TCE), other organics and sodium chloride.