As the Detroit Water and Sewerage Department moves to shut off water to thousands of residents who are delinquent on their bills, a coalition of activists is appealing to the United Nations High Commission for Human Rights to intervene on behalf of the bankrupt city’s most vulnerable citizens.  Their report, filed Wednesday with the UN’s Special Rapporteur on the Human Right to Safe Drinking Water and Sanitation, alleges that the DWSD crackdown is part of an effort “to sweeten the pot for a private investor” to take over the city’s heavily-indebted water and sewer system as part of Detroit’s broader bankruptcy proceedings...[The] activists...[allege] disparate treatment of residential and commercial clients by the DWSD. The People’s Water Board claims that delinquent business entities “have not been targeted in the same way as residential users,” a claim the department strongly disputes. “There are no sacred cows. We aren’t discriminating in terms of individuals or businesses,” DWSD spokesman Bill Johnson said... “...Everybody is getting cut off who is $150 or 60 days in arrears...” The department has not yet had time to break out the data on water shutoffs by client category, Johnson said, but he hopes to be able to report exact figures on the number of business clients who have lost water access soon...[Plans] to privatize the city’s water services have been criticized as too rapid, too costly, and too damaging to residents’ quality of life.