We've been following the escalating dispute between Attorney General Andrew Cuomo and local officials over five upstate hospitals and nursing homes that have been fined for flushing drugs down the drain. Here's a timeline of the controversy with links to our coverage.

Jan. 12: Cuomo sanctions hospitals.

Jan. 28: The Catskill Watershed Corporation holds emergency meeting in response.

Jan. 29: State Senator John Bonacic and Assemblyman Clifford Crouch demand that Cuomo fire watershed inspector general Philip Bein.

Feb. 1: Assemblyman Clifford Crouch says that the hospitals risk losing their $1 million loans from the Catskill Watershed Corporation.

Feb. 3: We get a draft of a formal compaint Delaware County may file has filed against the A.G. with the state's Watershed Protection and Partnership Council.

May 27: NYC DEP announces the results of a study on pharmaceuticals in the city's water supply; claims the trace levels of pharmaceuticals it found "pose no public health risks." (The full report can be downloaded here.)

Some context: A brief backgrounder on the politics of New York City's watershed.