Lambert Creek discharges into Vadnais Lake, the final impoundment reservoir containing the potable water supply for the city of St. Paul and eight nearby suburbs. Monitoring data indicates high nutrient levels and the creek is listed by the State as having high bacterial levels. In-stream work along Lambert Creek has been maximized with restoration improvements achieving nutrient load reduction. The next step to further improve water quality is to concentrate on restoration efforts on a subwatershed level.
Improving stormwater management in Grand Marais is a priority for the community. The Cook County Comprehensive Water Plan identifies water quality and quantity concerns related to residential development include increased runoff from roads, parking areas, roofs, etc. into Lake Superior.
Lambert Creek is wholly within the Vadnais Lake Area Water Management Area. Vadnais Lake is the drinking water reservoir for the City of St. Paul and surrounding communities. Lambert Creek has elevated bacteria and nutrient levels and water quality in Vadnais Lake will not improve unless there is a reduction in the phosphorus loading from Lambert Creek.
