Water Quality - Mill Creek Study

Mill Creek Study

The Mill Creek study was conducted in 2011, and a study report, titled the Biological and Water Quality Study of Mill Creek and Tributaries 2011, was published in 2012 by MSD’s consultant, the Midwest Biodiversity Institute.

The study included the entire mainstem of the Mill Creek from the border of Butler and Hamilton counties to the Ohio River, the West Fork of the Mill Creek, the East Fork of the Mill Creek, and tributaries to each. This watershed encompasses a drainage area of 170 square miles in a highly urban and industrial landscape.

As part of the study, standardized biological, chemical and physical monitoring and assessment techniques were employed using Ohio EPA methods and criteria. Sampling was conducted at 92 sites between June and October. The biological sampling and analysis was performed by Level 3 qualified data collectors and under a study plan approved by Ohio EPA. Seventy-six of the 92 sampling locations were evaluated against the warmwater habitat (WWH) or modified warmwater habitat (MWH) designation, while 16 of the sampling locations were evaluated against the Primary Headwater Habitat (PHWH) designation.

Highlighted findings of the study, as compared to a 1992 Ohio EPA study of the Mill Creek, are as follows:

  • General Conditions
  • Aquatic Life Use Attainment Status
  • Recreational Use Status

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