February 28, 2006

Phosphorus levels in Lake Allegan are declining, according to a recent report released by Michigan State University. Specifically, findings show the lake inlet phosphorus concentration has been reduced by nearly 20 percent in the last 5 years, and is two-thirds of the way toward reaching the water quality goal for Lake Allegan.

Department of Environmental Quality Director Steven E. Chester attributes the improvements to an innovative partnership of landowners, industry, government, community organizations, and citizens.

“The community should be commended for their efforts to reduce phosphorus, and their commitment to improving their environment,” said Director Chester. “This is a real success story.”

Phosphorus is an essential nutrient for all life forms; however, excessive amounts can cause extensive growth of aquatic plants and algae blooms. This condition can lead to low oxygen levels in the water and cause fish kills, taste and odor problems in drinking water, and can adversely impact recreational uses such as swimming and boating.

Under an innovative approach approved by the US Environmental Protection Agency, the DEQ reissued surface water discharge permits accompanied by a Cooperative Agreement among participating point and nonpoint source contributors in the watershed in which the parties committed to the development and implementation of plans to reduce sources of phosphorus.

The plans developed by local stakeholders to meet the goals of lowering the phosphorous levels in the lake outline reduction strategies in such areas as agriculture, construction activities, greenhouse nutrient management, storm water, point sources, septic systems, transportation systems, turf management, and alternative landscaping.

The Lake Allegan report is based on a rigorous study conducted by Dean G. Baas, working from the W. K. Kellogg Biological Station. The report can be obtained online at http://www.kbs.msu.edu/kzoonps.

Editor’s note: DEQ news releases are available on the department’s Internet home page at www.michigan.gov/deq.

“Protecting Michigan’s Environment, Ensuring Michigan’s Future”

Revised February 28, 2006 by Pat Watson