Water quality is at the heart of what MSD does every day.
Visit our interactive Water Quality Story Map to learn more about MSD's water quality monitoring program in a visual format.
MSD monitors water quality and aquatic habit in the Mill Creek, Little Miami River, and Muddy Creek & other tributaries. MSD partners with the Midwest Biodiversity Institute (MBI) to perform comprehensive biological, chemical, and physical sampling and analysis in sampling rounds every four or five years. The results are then compared to previous studies and Ohio Water Quality Standards
The most recent (third round) of water quality sampling was conducted in 2021-2023.
The second round of sampling was conducted in 2016-2019:
The benchmarking (baseline) round of sampling was conducted in 2011-2014:
For more information about our local streams, please see our stream-specific webpages below.
The health of local streams isn’t just dependent on what's in the water; it's also important for fish and other aquatic organisms to have a natural habitat.
Toward that goal, MSD and the MILL CREEK ALLIANCE are working to eliminate low-head dams on the Mill Creek mainstem. LEARN MORE
The Mill Creek, once named the most endangered urban stream in America, is on its way toward recovery.
learn more
The lower Little Miami, a State and National Wild and Scenic River, is sustaining water quality in the mainstem but is widely impaired by E. coli.
learn more
A majority of Muddy Creek and other tributaries of the Ohio River are not in attainment with their aquatic life uses and there is widespread impairment of E. coli.
learn more