In 2012, over 22 billion gallons of Lake Michigan water, worth between an estimated $64 million and $147 million, were lost to leaky, aging infrastructure. CNT and CMAP studied the water loss control techniques used by Lake Michigan water suppliers and found that over the last several years, 21% of permittees have been out of compliance with the current 8% annual water loss standard set by Illinois Department of Natural Resources (IDNR). In addition to offering recommendations to IDNR, this report also acknowledges the challenges faced by utilities in tackling the water loss issue and provides manageable solutions specifically addressing available industry best practices.