PFAS Supplemental Study

ORSANCO is conducting a PFAS (per- and polyfluoroalkyl substances) monitoring project during 2021-2022. The purpose of the study is to determine the ambient level of PFAS compounds in the Ohio […]

ORSANCO conducted two supplemental studies of mercury, in addition to routine monitoring as part of the Clean Metals program. The first study, on the mainstem of the Ohio River, evaluated […]







The National Rivers and Streams Assessment (NRSA) is a US EPA program to evaluate the ecological condition of the nation’s rivers and streams. During the 2018 and 2019 field seasons, […]

ORSANCO developed a Harmful Algal Bloom Monitoring (HAB), Response and Communications Plan for the Ohio River. (Available under Files.) EPA, in partnership with ORSANCO, recently developed an app to predict […]

In addition to monitoring and reporting the current status of water quality, ORSANCO occasionally conducts trend assessments of its historical water quality data. Recent trend reports are available to view […]

General report on  What are Fish Consumption Advisories State Links Illinois Illinois Environmental Protection Agency, Office of Chemical Safety (217) 785-0830 Illinois Department of Public Health, Division of Food, Drugs […]

The objective of the Water Quality Act of 1987 is to “restore and maintain the chemical, physical, and biological integrity of the nation’s waters.” Monitoring strategies described by the U.S. […]