Microcystin Levels

View current and historical microcystin levels in Grand Lake St. Marys here.

Grand Lake St. Marys Water Quality: 2021 in Review

Video from the November 2021 LIA member meeting, plus a Grand Lake St. Marys water quality PowerPoint presentation shared by

The Fishes of Grand Lake St. Marys

Grand Lake St. Marys water quality update & The Fishes of Grand Lake St. Marys presented by Wright State University-Lake Campus' Dr. Stephen Jacquemin at the April 2021 Lake Improvement Association membership meeting.

Grand Lake St. Marys Water Quality Update – September 2020

Water quality update by Dr. Stephen Jacquemin, Associate Professor of Biology, Wright State University-Lake Campus.

Summary of GLSM Wetlands Monitoring 2019

Wright State University's Dr. Stephen Jacquemin and Ag Solutions' Theresa Dirksen gave an update on wetlands monitoring at the February 2020 Lake Improvement Association member meeting.

Changes in Water Quality in GLSM Watershed Following Manure Application Regulations

These documents offer a summary and full report of the water quality changes in the Grand Lake St. Marys watershed following manure application regulations.

Adaptive Management Plan 2017

This file contains the updated Adaptive Management Plan created for Grand Lake St. Marys in 2017.

Prairie Creek Treatment Train Schematic Design Narrative

An overview of the treatment train at Prairie Creek near Grand Lake St. Marys. Featuring a project description, maps, photos,

Battelle Grand Lake St. Marys Assessment – Airy Gator Performance Report

The Battelle Grand Lake St. Marys Assessment – Airy Gator Performance Report details Battelle’s findings for Grand Lake St. Marys

FFT ECSIA Force Algae Control Sample Trials

FFT ECSIA Force Algae Control Sample Trials Microcystin and other trends