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Aluminum Sulfate Antitrust Case


On December 1, Lockridge Grindal Nauen filed an antitrust class action on behalf of the City of Rochester, Minnesota, alleging price-fixing and bid-rigging involving liquid aluminum sulfate (aka “Alum”). Alum is used by municipalities to treat drinking and waste water, and by paper companies in the paper manufacturing process. On October 27, 2015, the United States Department of Justice and the FBI announced that a former executive of General Chemical Corporation pled guilty to rigging bids, allocating customers and fixing prices of alum over a 13-year period with other as-yet unidentified companies.

If you purchased alum between 1997 and today from General Chemical, Chemtrade Logistics, Gentek, Hawkins, C&S Chemical, GEO Specialty, USALCO, Kemira, Thatcher, or other suppliers of alum, you may have overpaid.

LGN Partner Joe Bruckner explains the case in the Duluth News Tribune.


If you would like to discuss your legal options, please contact Joe Bruckner, Heidi Silton, or Brian Clark at or at 612-339-6900.

Articles & Documents

02-23-2016Class Action Complaint – City of Milwaukee

02-17-2016Indictment of former General Chemical President Vincent Opalewski and GEO Specialty executive Brian Steppig

02-04-2016Judicial Panel on Multidistrict Litigation Order Centralizing Alum Cases in New Jersey

The Judicial Panel on Multidistrict Litigation has centralized the liquid aluminum sulfates antitrust actions in the District of New Jersey. LGN represents several municipalities and other plaintiffs in this complex litigation. The LGN antitrust team is looking forward to prosecuting the case before Judge Linares in New Jersey.

01-15-2016Class Action Complaint – City of St. Cloud

01-04-2016Star Tribune article:  Minnesota cities allege prices of water-quality chemical were inflated.

12-29-2015Class Action Complaint – Board of Water Commissioners City of St. Paul

12-21-2015Class Action Complaint – City of Minneapolis

12-21-2015Class Action Complaint – TeeMark Corporation

12-21-2015Class Action Complaint – City of Duluth

12-11-2015Class Action Complaint – City of East Grand Forks

12-07-2015Class Action Complaint – Met Council

12-01-2015Class Action Complaint – City of Rochester

12-01-2015Minneapolis/St. Paul Business Journal article regarding Complaint

10-27-2015Plea Agreement

10-27-2015Criminal information