Lake Cornelia, just south of Highway 62 in Edina, is a shallow lake facing challenging water quality issues.

street view map of Lake Cornelia
Lake Cornelia, Edina

Water Quality

graph showing phosphorous levels in cornelia over time
Phosphorous levels in Lake Cornelia exceed the state standard.

Water quality in Lake Cornelia is poor and not meeting state standards for shallow lakes. The poor water quality is from excess nutrients (phosphorus) in the lake. The excess nutrients promotes algal growth (measured by chlorophyll-a) and can cause decreases in water clarity. The phosphorus in Lake Cornelia comes from several sources, including stormwater runoff from the large watershed area that drains to the lake, the breakdown of plants, and nutrient-rich sediments. Bottom-feeding fish species like bullhead and goldfish also stir up bottom sediments and release nutrients. In addition to the invasive goldfish found in the lake, curly-leaf pondweed, purple loosestrife, hybrid cattails, and common carp are also found in Lake Cornelia.


graph of water quality in cornelia over time
Water clarity in Lake Cornelia consistently exceed state standards.
graph of chlorophyll-a in cornelia over time
Chlorophyll-a levels in Lake Cornelia consistently exceed the state standard.


Printable lake fact sheet

Current Projects

The Nine Mile Creek Watershed District is conducting projects to improve the health of Lake Cornelia. An in-lake alum treatment was conducted in May 2020 to help control phosphorous release from lake bottom sediments. This project should decrease phosphorous and improve the overall health of the lake. The District is also studying the goldfish population in order to understand the best way to manage the population living in the lake. The District will undertake additional projects to continue to improve water quality conditions.

For information about other past District projects, click here.


icon of person hikingicon of picnic tableicon of fishing






Lake Cornelia has a 1.1 mile paved biking/hiking trail around the lake. Rosland Park, adjacent to Lake Cornelia, has picnic areas, disc golf, baseball fields, a playground, and an aquatic center. A variety of fish species live in the lake including: black bullhead, black crappie, bluegill, green sunfish, hybrid sunfish, pumpkinseed, yellow perch, common carp, golden shiner, and goldfish.


The Minnesota Department of Natural Resources may have additional information on the lake (including fishing regulations; location; water access sites; lake maps; lake reports on stocking, ice in/out and water quality; fish consumption; and aquatic plant surveys) if so, that information can be found here:


Downloadable water quality data can be found here:


diagram of ways to clean water—clean off boats for AIS, sweep up leaves and grass, pick up after pets, and plant native plants