Stormwater retention ponds
Our HOA in Maple Grove has a stormwater retention pond which drains into Elm Creek and 7 miles later into the Mississippi. Homeowners living directly on the pond are troubled by the presence of algae and weeds in the pond. The ponds are currently being treated with chemicals to inhibit that growth. The treatment apparently has been at least partially ineffective. Do the chemicals defeat the purpose of the pond? Homeowners living on the pond would like to place fountains in the pond to limit the growth of the algae. There are no fish in the pond. Will fountains be effective in limiting the growth of algae and weeds? Are there any other recommended methods to limit the growth of the algae and weeds that are approved and effective? Tim Engel Director Terrace Condominiums 651-481-9723
Hennepin County Minnesota
Thank you for your question.
Since we don't have the expertise to provide a research-based answer, we would like to suggest that you contact local organizations/groups such as your local Soil and Water Conservation District (SWCD) or perhaps your county Environmental Services office.