During the year that Mayor Daley’s son had a hidden ownership stake in a sewer company, the business not only landed lucrative deals at City Hall, it also got work from another local government—the Metropolitan Water Reclamation District of Greater Chicago.

Records show the Water Reclamation District paid the company, Municipal Sewer Services, more than $200,000 to inspect sewers under a contract awarded in 2004. At the time, the agency’s top administrator was John Farnan, a longtime member of the 11th Ward Democratic organization run by the mayor’s brother, Cook County Commissioner John Daley. Farnan, who has since retired, did not return calls seeking comment.