Bottom Sediment Sampling

Samples of Ohio River and tributary bottom sediments were collected during continuous low flows in August and September of 2001 on the upper 317 miles of the Ohio River and […]

Section 303(d) of the Clean Water Act requires states to develop Total Maximum Daily Loads (TMDLs) for waters not meeting designated uses after technology-based controls have been implemented.  A TMDL […]

The Ohio River Valley Water Sanitation Commission (ORSANCO) is currently using a sampling technique called high-volume water sampling to quantify instream concentrations of dioxin, PCBs and chlordane in the Ohio […]

Between 1995 and 2007, ORSANCO conducted studies of wet weather impacts in areas of the Ohio River including Cincinnati, Louisville, and Wheeling. The Cincinnati area study was completed in 2002; […]

The Ohio River Watershed Pollutant Reduction Program was initiated in 1995 and continued until 2010.  Its goal was to generate information relevant to reducing levels of significant pollutants found in […]

ORSANCO completes an assessment and report of Ohio River water quality conditions every two years, otherwise known as the “305b Report.”  Water quality data are compared to water quality criteria […]

Required by the Safe Drinking Water Act Amendments to protect public drinking water supplies, the Source Water Assessment Program requires states to: delineate source water protection areas for public water […]

The Organics Detection System is a cooperative effort involving water utilities and other major Ohio River water users to monitor volatile organic compounds (VOCs) in the river. The program is […]

Nutrient pollution, especially from nitrogen and phosphorus, has consistently ranked as one of the top causes of degradation in some U.S. waters for more than a decade. Excess nitrogen and […]