Contact Recreation Season Bacteria Monitoring Data

Updates every Friday (April 1st – October 31st):Weekly Bacteria Results 2024

During the contact recreation season (April-October), ORSANCO monitors bacteria levels in six urban areas along the Ohio River. Samples are collected at upstream, downtown, and downstream locations in Cincinnati. Samples are also collected at upstream and downstream locations at the five other urban areas. Samples are analyzed for both fecal coliform and E. Coli bacteria.

Water User’s Bacteria Summary Data

The Water Users Data Summary contains data that are provided by Ohio River water utilities and are combined with ORSANCO’s Contact Recreation season bacteria monitoring data.

Longitudinal Bacteria Data

Ohio River longitudinal bacteria surveys were completed as part of the Ohio River Watershed Pollutant Reduction Program. These surveys involved collecting samples for E. coli analysis approximately every five miles along the entire length of the Ohio River. Additional samples were also collected at the mouths of over 125 direct tributaries to the Ohio River.

For more information on Bacteria data, please contact Stacey Cochran.



Bacteria Data

1998 - 2023 Bacteria Annual Summary Download
2006 - 2023 Bacteria Year End Report Download
2001 - 2023 Water Users Data Summary Download
2018 Bacteria Trends Report Download
2008 - 2012 Cincinnati Enterococcus Study Results Download
2003 - 2012 Ohio River Longitudinal and Tributary Bacteria (E. Coli) Data Download