The excess clear water from I/I problems uses sanitary sewer capacity needed for wastewater. The result is
increased costs (about $300-$400 million annually) for needlessly putting clear water through the wastewater treatment process
Metropolitan Council Environmental Services (MCES),
which provides regional wastewater collection and treatment for the metropolitan area, requires communities with excess I/I to invest in local reduction remedies such as disconnecting sump pumps and foundation drains from sanitary sewers and repairing leaky sanitary sewer pipes.
To urge compliance, MCES incorporated surcharges for communities with excess I/I.
Maple Plain was identified as a contributor of excess I/I and therefore pays a surcharge. As a result, Maple Plain is working to resolve the problem of excess I/I.